
[[Image:Oil well3419.jpg|frame|Nodding donkey pumping an oil well near Sarnia, Ontario, 2001]] Petroleum (from Latin ''petra'' – rock and ''oleum'' – oil), crude oil, sometimes colloquially called ''black gold'', is a thick, dark brown or greenish flammable liquid, which exists in the upper strata of some areas of the Earth's Crust (geology). It consists of a complex mixture of various hydrocarbon, largely of the alkane series, but may vary much in appearance, composition, and purity. It is an important "primary energy" source ([http://www.iea.org/bookshop/add.aspx?id=144 IEA Key World Energy Statistics]). Petroleum is also the raw material for many chemical products, including solvents, fertilizers, pesticides, and plastics. ==Origin== ===Biogenic theory=== Most geologys view crude oil, like coal and natural gas, as the product of diagenesis of ancient vegetation over geological timescales. According to this theory, it is formed from the decayed remains of prehistoric marine animals and terrestrial plants. Over many centuries this organic matter, mixed with mud, is buried under thick sedimentary layers of material. The resulting high levels of heat and pressure cause the remains to Diagenesis first into a waxy material known as kerogen, and then into liquid and gaseous hydrocarbons in a process known as Catagenesis_%28geology%29. These then migrate through adjacent rock layers until they become trapped underground in porous rocks called reservoirs, forming an oil field, from which the liquid can be extracted by drilling and pumping.
===Alternative theories === Thomas Gold was the most widely known Western proponent of the Russian-Ukrainian theory of abiogenic petroleum origin. This theory suggests that large amounts of carbon exist naturally in the planet, some in the form of hydrocarbons. Hydrocarbons are less dense than aqueous pore fluids, and so migrate upward. Deep Microorganismforms convert them into the various hydrocarbon deposits. Thermodynamic calculations and experimental studies confirm that n-alkanes (common petroleum components) do not spontaneously evolve from methane at pressures typically found in sedimentary basins, and so the theory of an abiotic origin of hydrocarbons suggests deep generation (below 200 km) (see [http://www.gasresources.net/ results]). *[http://www.gasresources.net/DisposalBioClaims.htm Dismissal of the Claims of a Biological Connection for Natural Petroleum.] *[http://www.aapg.org/explorer/2002/11nov/abiogenic.cfm Abiogenic Gas Debate 11:2002 (EXPLORER)] *Abiogenic petroleum origin ==Composition== In refining, the component chemicals of petroleum are separated by distillation. Products based on refined crude oil include kerosene, benzene, gasoline, paraffin wax, asphalt, etc. Subtler techniques, such as gas chromatography, HPLC, and GC-MS, can separate some fractions of petroleum into individual compounds. Strictly speaking, petroleum consists of hydrocarbons: compounds of hydrogen and carbon; and non-hydrocarbon fractions: compounds which might also include nitrogen, sulfur, oxygen, or traces of metals such as vanadium or nickel. The four lightest alkanes — CH4 (methane), C2H6 (ethane), C3H8 (propane) and C4H10 (butane) — are all gases, boiling at -161.6°C, -88.6°C, -42°C, and -0.5°C, respectively (-258.9°, -127.5°, -43.6°, and +31.1° F). The chains in the C5-7 range are all light, easily vaporized, clear Naphtha. They are used as solvents, dry cleaning fluids, and other quick-drying products. The chains from C6H14 through C12H26 are blended together and used for gasoline. Kerosene is made up of chains in the C10 to C15 range, followed by diesel fuel/heating oil (C10 to C20) and heavier fuel oils as the ones used in ship engines. These petroleum compounds are all liquid at room temperature. Lubricating oils and semi-solid greases (including Vaseline®) range from C16 up to C20. Chains above C20 form solids, starting with paraffin wax, then tar and asphaltic bitumen. Boiling ranges of petroleum atmospheric pressure distillation fractions in degrees Celsius: * petrol ether: 40 - 70 °C (used as solvent) * light petrol: 60 - 100 °C (automobile fuel) * heavy petrol: 100 - 150 °C (automobile fuel) * light kerosene: 120 - 150 °C (household solvent and fuel) * kerosene: 150 - 300 °C (jet engine fuel) * gas oil: 250 - 350 °C (Diesel fuel/ heating) * lubrication oil: > 300 °C (engine oil) * remaining fractions: tar, asphalt, residual fuel ==Extraction== Generally the first stage in the extraction of crude oil is to drill a well into the underground reservoir. Historically, in the USA some oil fields existed where the oil rose naturally to the surface, but most of these fields have long since been depleted, except for certain remote locations in Alaska. Often many wells will be drilled into the same reservoir, to ensure that the extraction rate will be economically viable. Also some wells may be used to pump water, steam or various gas mixtures into the reservoir to raise or maintain the reservoir pressure, and so maintain an economic extraction rate. If the underground pressure in the oil reservoir is sufficient, then the oil will be forced to the surface under this pressure. Gaseous fuels or natural gas are usually present, which also supplies needed underground pressure. In this situation it is sufficient to place a complex arrangement of valves on the well head to connect the well to a pipeline network for storage and processing. This is called primary oil recovery. Usually, only about 20% of the oil in a reservoir can be extracted this way. Over the lifetime of the well the pressure will fall, and at some point there will be insufficient underground pressure to force the oil to the surface. If economical, and it often is, the remaining oil in the well is extracted using secondary oil recovery methods. see: Energy balance and Net energy gain. Secondary oil recovery uses various techniques to aid in recovering oil from depleted or low-pressure reservoirs. Sometimes pumps, such as Nodding donkey and Electrical Submersible Pumps (ESPs), are used to bring the oil to the surface. Other secondary recovery techniques increase the reservoir's pressure by Water Injection, natural Gas reinjection and Gas Lift, which injects air, carbon dioxide or some other gas into the reservoir. Together, primary and secondary recovery allow 25 to 35% of the reservoir's oil to be recovered. Tertiary oil recovery reduces the oil's viscosity to increase oil production. Tertiary recovery is started when secondary oil recovery techniques are no longer enough to sustain production, but only when the oil can still be extracted profitably. This depends on the cost of the extraction method and the current price of crude oil. When prices are high, previously unprofitable wells are brought back into production and when they are low, production is curtailed. Thermally-enhanced oil recovery methods (TEOR) are tertiary recovery techniques that heat the oil and make it easier to extract. Steam injection is the most common form of TEOR, and is often done with a cogeneration plant. In this type of cogeneration plant, a gas turbine is used to generate electricity and the waste heat is used to produce steam, which is then injected into the reservoir. This form of recovery is used extensively to increase oil production in the San Joaquin Valley, which has very heavy oil, yet accounts for 10% of the United State's oil production. In-situ burning is another form of TEOR, but instead of steam, some of the oil is burned to heat the surrounding oil. Occasionally, detergents are also used to decrease oil viscosity. Tertiary recovery allows another 5 to 15% of the reservoir's oil to be recovered. ==History== The first oil wells were drilled in China in the 4th century or earlier. The oil was burned to evaporate brine and produce sodium chloride. By the 10th century, extensive bamboo pipeline transport connected oil wells with salt springs. The modern history of oil began in 1853, with the discovery of the process of oil distillation. Crude oil was distilled into kerosene by Ignacy Lukasiewicz, a Polish scientist. The first "rock oil" mine was created in Bobrka, near Krosno in southern Poland in the following year and the first refinery (actually a distillery) was built in Ulaszowice, also by Lukasiewicz. The American petroleum industry began with Edwin Drake's discovery of oil in 1859, near Titusville, Pennsylvania. The industry grew slowly in the 1800s and did not become a real national concern until the early part of the 20th century; the introduction of the internal combustion engine provided a demand that has largely sustained the industry to this day. Early "local" finds like those in Pennsylvania and Ontario were quickly exhausted, leading to "oil booms" in Texas, Oklahoma, and California. Other countries had sizable oil reserves as a part of their colonial holdings, and started to develop them at an industrial level. While even in 1955 coal was still the world's foremost fuel, oil began to take over. Following the 1973 energy crisis and the 1979 energy crisis there was significant media coverage of oil supply levels. This brought to light the concern that oil is a limited resource that will eventually run out, at least as an economically viable energy source. At the time, the most common and popular predictions were always quite dire, and when they did not come true, many dismissed all such discussion. The future of petroleum as a fuel remains somewhat controversial. USA Today news (2004) reports that there are 40 years of petroleum left in the ground. Some would argue that because the total amount of petroleum is finite, the dire predictions of the 1970s have merely been postponed. Others argue that technology will continue to allow for the production of cheap hydrocarbons and that the earth has vast sources of unconventional petroleum reserves in the form of tar sands, bitumen fields and oil shale that will allow for petroleum use to continue for an extremely long period in the future. Today about 90% of vehicular fuel needs are met by oil. Petroleum also makes up 40% of total energy consumption in the United States, but is responsible for only 2% of electricity generation. Petroleum's worth as a portable, dense energy source powering the vast majority of vehicles and as the base of many industrial chemicals makes it one of the world's most important commodities. Access to it was a major factor in several military conflicts, including World War II and the Persian Gulf War. About 80% of the world's readily accessible reserves are located in the Middle East. USA territory has less than 3%. ==Environmental effects== The presence of oil has significant social and environmental impacts, from accidents and routine activities such as seismic exploration, drilling, and generation of polluting wastes. Oil extraction is costly and sometimes environmentally damaging, although Dr. John Hunt from Woods Hole pointed out in a 1981 paper that over 70% of the reserves in the world are associated with visible macroseepages, and many oil fields are found due to natural leaks. Offshore exploration and extraction of oil disturbs the surrounding marine environment. Extraction may involve dredging, which stirs up the sea bed, killing the sea plants that marine creatures need to survive. Crude oil and refined fuel spills from tanker ship accidents have damaged fragile ecosystems in Alaska, the Galapagos Islands, Spain, and many other places. Renewable energy source alternatives do exist, although the degree to which they can replace petroleum and the possible environmental damage they may cause is controversial. == Future of oil == ''Main article: Hubbert Peak'' The Hubbert peak theory, also known as peak oil, is a controversial theory concerning the long-term rate of conventional oil and other fossil fuel production and depletion. It assumes that oil reserves are not replenished, and predicts that future world oil production must inevitably reach a peak and then decline as these reserves are exhausted. Much of the controversy is over whether past production or discovery data can be used to predict a future peak. Based on available production data, proponents have previously (and incorrectly) predicted the peak years to be 1989, 1995, or 1995-2000, however these predictions date from before the recession of the early 1980's, and the consequent reduction in global consumption, the effect of which was to delay the date of any peak by several years. A new prediction by Goldman Sachs picks 2007 for oil and some time later for natural gas. == Classification == The oil industry classifies "crude" by the location of its origin (e.g., "West Texas Intermediate, WTI" or "Brent") and often by its relative weight (API gravity) or viscosity ("light", "intermediate" or "heavy"); refiners may also refer to it as "sweet", which means it contains relatively little sulfur, or as "sour", which means it contains substantial amounts of sulfur and requires more refining in order to meet current product specifications. The world reference barrel (unit)s are: * Brent Blend, comprising 15 oils from fields in the Brent Oilfield and Ninian systems in the East Shetland Basin of the North Sea. The oil is landed at Sullom Voe terminal in the Shetlands. Oil production from Europe, Africa and Middle Eastern oil flowing West tends to be priced off the price of this oil, which forms a benchmark. See also Brent crude. * West Texas Intermediate (WTI) for North American oil. * Dubai used as benchmark for the Asia-Pacific region for Middle East Oil * Tapis (from Malaysia, used as a reference for light Far East oil) * Minas (from Indonesia, used as a reference for heavy Far East oil) * The OPEC Basket consisting of ** Arab Light Saudi Arabia ** Bonny Light Nigeria ** Fateh Dubai ** Isthmus Mexico (non-OPEC) ** Minas Indonesia ** Saharan Blend Algeria ** Tia Juana Light Venezuela OPEC attempts to keep the price of the Opec Basket between upper and lower limits, by increasing and decreasing production. This makes the measure important for market analysts. The OPEC Basket, including a mix of light and heavy crudes, is heavier than both Brent and WTI. See also [http://tonto.eia.doe.gov/ask/crude_types1.html] ==Pricing== References to the oil price are usually either references to the spot price of either WTI/Light Crude as traded on New York Mercantile Exchange (NYMEX) for delivery in Cushing, Oklahoma; or the price of Brent as traded on the International Petroleum Exchange (IPE) for delivery at Sullom Voe. The price of a barrel of oil is highly dependent on both its grade (which is determined by factors such as its specific gravity or API and its sulpher content) and location. The vast majority of oil will not be traded on an exchange but on a Over-the-counter_trading basis, typically with reference to a marker crude oil grade that is typically quoted via the pricing agency Platts. For example in Europe a particular grade of oil, say Fulmar, might be sold at a price of "Brent plus US$0.25/barrel".or as an intra-company transaction. IPE claim that 65% of traded oil is priced off their Brent benchmarks. Other important benchmarks include Dubai, Tapis, and the OPEC basket. The Energy Information Administration (EIA) uses the Imported Refiner Acquisition Cost, the weighted average cost of all oil imported into the US as their "world oil price". It is often claimed that OPEC sets the oil price and the true cost of a barrel of oil is around $2, which is equivalent to the cost of extraction of a barrel in the Middle East. These estimates of costs ignore the cost of finding and developing oil reserves. Furthermore the important cost as far as price is concerned, is not the price of the cheapest barrel but the cost of producing the marginal barrel. By limiting production OPEC has caused more expensive areas of production such as the North Sea to be developed before the Middle East has been exhausted. OPEC's power is also often overstated. Investing in spare capacity is expensive and the low oil price environment in the late 90s led to cutbacks in investment. This has meant during the oil price rally seen between 2003-2005, OPEC's spare capacity has not been sufficient to stabilise prices. Oil demand is highly dependent on global macroeconomic conditions, so this is also an important determinant of price. Some economists claim that high oil prices have a large negative impact on the global growth. This means that the relationship between the oil price and global growth is not particularly stable although a high oil price is often thought of as being a late cycle phenomenon. A recent low point was reached in January 1999, after increased oil production from Iraq coincided with the Asian financial crisis, which reduced demand. The prices then rapidly increased, more than doubling by September 2000, then fell until the end of 2001 before steadily increasing, reaching US $40 to US $50 per barrel by September 2004 (see Oil price increases of 2004). [http://futures.tradingcharts.com/chart/CO/M] In October 2004, light crude futures on the NYMEX for November delivery exceeded US $53 per barrel and for December delivery exceeded US $55 per barrel. Crude oil prices surged to a record high above $59 a barrel in June 2005, sustaining a rally built on strong demand for gasoline and diesel and on concerns about refiners' ability to keep up. The New York Mercantile Exchange (NYMEX) trades crude oil (including futures contracts) and provides the basis of US crude oil pricing via WTI (West Texas Intermediate). Other exchanges also trade crude oil futures, eg the International Petroleum Exchange (IPE) in London trades contracts in Brent crude. See also [http://www.wtrg.com/prices.htm History and Analysis of Crude Oil Prices] ==Top petroleum producing countries== (Ordered by amount ''produced'' in 2003): *Saudi Arabia (OPEC) *United States *Russia *Iran (OPEC) *Mexico *China *Norway *Canada *United Arab Emirates (U.A.E) (OPEC) *Venezuela (OPEC) *United Kingdom (U.K.) *Kuwait (OPEC) *Nigeria (OPEC) (Ordered by amount ''exported'' in 2003): *Saudi Arabia (OPEC) *Russia *Norway *Iran (OPEC) *United Arab Emirates (U.A.E) (OPEC) *Venezuela (OPEC) *Kuwait (OPEC) *Nigeria (OPEC) *Mexico *Algeria (OPEC) *Libya (OPEC) Note that the USA consumes almost all of its own production. Source: [http://www.eia.doe.gov/emeu/cabs/topworldtables1_2.html Energy Statistics from the U.S. Government] See also: Organization of Petroleum Exporting Countries. ==Related topics== * Abiogenic petroleum origin * List of oil fields * List of oil-producing states. * List of petroleum companies. * Energy crisis: 1973 energy crisis, 1979 energy crisis. * Fossil fuel. * Greenhouse gases. * History of the Petroleum Industry. * Hubbert peak (aka peak oil). * Future energy development. * 1990 spike in the price of oil * Non-conventional oil. * Oil imperialism. * Oil price increases of 2004 * Oil price increases of 2005 * Oil refinery. * Oil supplies. * Oil well. * Olduvai theory (not strictly about oil, but it basically assumes that oil and gas are the only significant energy sources). * Petroleum disasters. * Petroleum politics. * Renewable energy. * Thermal depolymerization. * Thomas Gold. ==External links== * [http://www.api.org/ American Petroleum Institute] - A site run by the American Petroleum Institute, the trade association of the US oil industry. * [http://www.eia.doe.gov/oil_gas/petroleum/info_glance/petroleum.html US Energy Information Administration] - Part of the informative website of the US Government's Energy Information Administration. * [http://www.geo.uw.edu.pl/BOBRKA/DATY/daty.htm Major dates of the Polish petroleum industry] *[http://www.gasresources.net/DisposalBioClaims.htm Dismissal of the Claims of a Biological Connection for Natural Petroleum.] *[http://www.aapg.org/explorer/2002/11nov/abiogenic.cfm Abiogenic Gas Debate 11:2002 (EXPLORER)] *[http://www.gasresources.net/Introduction.htm An introduction to the modern petroleum science, and to the Russian-Ukrainian theory of deep, abiotic petroleum origins.] *[http://www.spe.org/elibinfo/eLibrary_Papers/spe/1982/82UGR/00010836/00010836.htm Unconventional Ideas About Unconventional Gas (Society of Petroleum Engineers)] ===Articles=== * [http://pr.caltech.edu/periodicals/CaltechNews/articles/v38/oil.html The End of the Age of Oil] - article adapted from a talk by Caltech vice provost and professor of physics David Goodstein * [http://www.publicintegrity.org/oil/ The Politics of Oil] - A report on the oil industry's influence of lawmakers and public policy by the ''Center for Public Integrity''. * [http://news.bbc.co.uk/2/hi/business/3953907.stm BBC: Stability fears rise as oil reliance grows] * [http://www.washingtonpost.com/wp-dyn/content/article/2005/06/09/AR2005060900148_pf.html Top Saudi Says Kingdom Has Plenty of Oil] "261 billion barrels in reserve..." ===Data=== *[http://www.eia.doe.gov/emeu/international/petroleu.html Department of Energy EIA - World supply and consumption] * [http://www.eia.doe.gov/oil_gas/petroleum/info_glance/prices.html US petroleum prices] ==Books about the petroleum industry== * * * * * * * * * ==Films about petroleum== * * * * ** http://www.endofsuburbia.com * * * * * * * * * ==Writers covering the petroleum industry== *Colin Campbell (geologist) *Jay Hanson *Kenneth S. Deffeyes *David Goodstein *Daniel Yergin *Thomas Gold Fossil fuels Lubricants Materials Natural resources Peak oil Petroleum vi:Dầu mỏ
== Fraction table == Should the fraction list be made into a table? -User:Smack 01:12 20 Jun 2003 (UTC) == Word origin == I would just like to note that petroleum does not derive from latin but from the Greek words petra (meaning stone) and elaion (meaning oil). Although i am not an expert in linguistics i believe that those words existed in greek long before they were introduced in latin (and continue to exist today with the exact same spelling and meaning as 2000 years ago). Moreover the word in greek today is in fact petraileo. Until now origins of words have been very accurate in wikipedia so anyone knowing better than my self should be kind enough to correct me. Gerasimos Contoguris The English word petroleum is derived from (and identical to) the medieval Latin petroleum. One could trace that through pre-medieval Latin, to Greek, perhaps even back to Proto-Indoeuropean if one were so inclined, but I am of the opinion that the etymology presented should refer to how the word entered the English language, rather than its oldest known ancestors. Since the word entered from Latin, an explanation of the Latin roots should be sufficient. For the curious, the OED has it like this: [a. med.L. petroleum, f. L. petra (Gr.) rock + oleum oil.]
--User:129.22.21.126 10:54, 9 Apr 2005 (UTC)
== Oil production costs ==
Looking for a link for oil production costs vs oil commedidy price over time (by region). Found everything from $1.70US to $9.00US per B for Light Sweet Crude 2000-2003 timeframe.
CHRISTOPHER
*Generally, oil & gas production cost differs from one country to another…and even from one field to another. But in the Arabian Gulf, it is very low compared to the rest of the world. No published data is available (all confidential). In the US, its cost was $18-22 to reach refineries. -- User:EagleamnUser_talk:EagleamnUser_talk:EagleamnUser_talk:Eagleamn 10:15, Jun 1, 2005 (UTC)
== Reference Barrels ==
West Texas Intermediate should be folded in here and the page made a redirect.
Need some more Info, I'll do what I can, but not my field (pun intended).
== Explanation of cuts ==
The description here reads like somthing out of a school text book and does not align with normal terminology. It is also at odds with a similar list in the oil refinery article. I'll try to work on a more sensible list, but one issue here is that the words used for the various cuts are very different in differnt parts of the world, and also differ between oil companies so I do not know how to handle this.--User:GPoss 12:03, Sep 3, 2004 (UTC)
== Types of Hydrocarbon ==
Article states that all crude oil is aliphatic. What is source of this statement, as most crude oil also have many aromatic molecules and none are purely aliphatic. --User:GPoss 12:06, Sep 3, 2004 (UTC)
: I agree. Should be both aliphatic and aromatic, AFAIK. --User:Iediteverything 14:21, 3 Sep 2004 (UTC)
== applications of petroleum, its impact on our everday lives? ==
There seems to be a bit missing from the petroleum entry, and that is the applications of petroleum and petroleum derivatives. One application in particular that I am researching is plastics. I'd like to know how much petroleum goes into producing each of the seven classifications of plastics (codes 1 - 7, explained below in terms of applications and recyclability:
1 - PET (Polyethylene terephthalate)
PET is used in the production of soft drink bottles, peanut butter jars...
PET can be recycled into fiberfill for sleeping bags, carpet fibers, rope, pillows...
2 - HDPE (High-density polyethylene)
HDPE is found in milk jugs, butter tubs, detergent bottles, motor oil bottles...
HDPE can be recycled into flower pots, trash cans, traffic barrier cones, detergent bottles...
3 - V (Polyvinyl chloride)
PVC is used in shampoo bottles, cooking oil bottles, fast food service items...
PVC can be recycled into drainage and irrigation pipes...
4 - LDPE (Low-density polyethylene)
LDPE is found in grocery bags, bread bags, shrink wrap, margarine tub tops...
LDPE can be recycled into new grocery bags...
5 - PP (Polypropylene)
PP is used in most yogurt containers, straws, pancake syrup bottles, bottle caps....
PP can be recycled into plastic lumber, car battery cases, manhole steps...
6 - PS (Polystyrene)
PS is found in disposable hot cups, packaging materials (peanuts), and meat trays...
PS can be recycled into plastic lumber, cassette tape boxes, flower pots...
7 - Other
Any insights? [mailto:jbeeson@gladstone.uoregon.edu]
== Petroleum in Romania ==
: The petroleum industry began with Edwin Drake's discovery of oil in 1859, near Titusville, Pennsylvania.
According to several sources [http://www.petrelrob.com/regional/international/europe/romania.html petrelrob.com], [http://www.petrom.ro/engleza/en_perioada1.htm petrom.ro], [http://www.radford.edu/~wkovarik/oil/5oilreservehistory.html radford.edu], [http://www.leeric.lsu.edu/bgbb/4/occurance.html lsu.edu], etc. Romania extracted 257 tones of petroleum in 1857 and thus began the modern oil industry. User:Bogdangiusca | User talk:Bogdangiusca 21:41, 1 Jan 2005 (UTC)
== Boiling points ==
The boiling points of the light alkanes were incorrect, the author had mixed up °F and °C. I replaced the values with the ones that were stated in the entries dealing with these compounds. -User:GalFisk
== Volume of large oil storage tanks ==
I was wondering if anyone knew the volume of those large cylindrical oil storage tanks that are seen around refineries. It appears to me there are two standard sizes. I would like to put this information into the barrel article because it might help people visualize large volumes of oil mentioned in some articles. Google was not easy to navigate on this one. Cheers. --User:Csnewton 12:45, 31 May 2005 (UTC)
: With a quick look I didn't find specific info (and I have doubts about two sizes). Found a nice picture [http://www.uscg.mil/d8/mso/corpus/photogallery/Refinery%20and%20barge%20positioning.jpg] and if "corpus" in the URL is Corpus Christi, some info might be at ([http://www.iwr.usace.army.mil/ndc/ports/pdf/ps/ps25.pdf]) but I don't know the name of the facility in the picture. Look along the ship channel on maps or photos for that facility and you might find the location, perhaps well enough to find the street address. If you can find the diameter of the tank and the height you can calculate the volume of that cylinder. That would be an estimate, as many tanks have floating lids or the outer shell encloses other structures which use up some of the volume. If you know of a nearby refinery or oil pipeline terminal, search for those names to find specific info for those. And telephone them and ask. (User:SEWilco 16:52, 31 May 2005 (UTC))
:: Very large industrial tanks are generally customized to the size the customer needs. The cost of materials and construction for unneeded capacity exceeds the savings gained by mass production. For example, let's say there's a choice of a 1 million or a 2.5 million gallon tank. If a company needs a tank that can hold 1.4 million gallons, there's going to be a lot of wasted space. (unsigned comment by 66.214.73.44)
== UK crude limit ==
In the UK, teachers aren't allowed to use Crude oil in front of pupils because it possibly causes cancer and infertility. Where might I say this? User:Celestianpower 15:43, 5 Jun 2005 (UTC)
:Oil casues infertility? Well that's interesting. Saudi Arabia has one of the highest rates of fertility in the world. -- User:EagleamnUser_talk:EagleamnUser_talk:EagleamnUser_talk:Eagleamn 16:19, Jun 5, 2005 (UTC)
:: Maybe you can say it in a "Strange things about the UK" letter to a London newspaper. (User:SEWilco 22:32, 5 Jun 2005 (UTC))
So you're saying it's nonnotable and shouoldn't go on then? User:Celestianpower 14:50, 6 Jun 2005 (UTC)
:::i think he was being a bit tounge in cheek but if this is true (which i suspect it is theres a lot of fairly nasty impurities in crude) and we are going to put it in the article. then we need a reputable source with more detail (prefereablly the original regulation if it exists). User:Plugwash 14:58, 6 Jun 2005 (UTC)
Well I found out first fro,m my chemistry teacher and He would know because he's been banned from using it. I'll ask him.User:Celestianpower 17:06, 6 Jun 2005 (UTC)
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Petroleum
[[Image:Oil well3419.jpg|frame|Nodding donkey pumping an oil well near Sarnia, Ontario, 2001]] Petroleum (from Latin ''petra'' – rock and ''oleum'' – oil), crude oil, sometimes colloquially called ''black gold'', is a thick, dark brown or greenish flammable liquid, which exists in the upper strata of some areas of the Earth's Crust (geology). It consists of a complex mixture of various hydrocarbon, largely of the alkane series, but may vary much in appearance, composition, and purity. It is an important "primary energy" source ([http://www.iea.org/bookshop/add.aspx?id=144 IEA Key World Energy Statistics]). Petroleum is also the raw material for many chemical products, including solvents, fertilizers, pesticides, and plastics. ==Origin== ===Biogenic theory=== Most geologys view crude oil, like coal and natural gas, as the product of diagenesis of ancient vegetation over geological timescales. According to this theory, it is formed from the decayed remains of prehistoric marine animals and terrestrial plants. Over many centuries this organic matter, mixed with mud, is buried under thick sedimentary layers of material. The resulting high levels of heat and pressure cause the remains to Diagenesis first into a waxy material known as kerogen, and then into liquid and gaseous hydrocarbons in a process known as Catagenesis_%28geology%29. These then migrate through adjacent rock layers until they become trapped underground in porous rocks called reservoirs, forming an oil field, from which the liquid can be extracted by drilling and pumping.
===Alternative theories === Thomas Gold was the most widely known Western proponent of the Russian-Ukrainian theory of abiogenic petroleum origin. This theory suggests that large amounts of carbon exist naturally in the planet, some in the form of hydrocarbons. Hydrocarbons are less dense than aqueous pore fluids, and so migrate upward. Deep Microorganismforms convert them into the various hydrocarbon deposits. Thermodynamic calculations and experimental studies confirm that n-alkanes (common petroleum components) do not spontaneously evolve from methane at pressures typically found in sedimentary basins, and so the theory of an abiotic origin of hydrocarbons suggests deep generation (below 200 km) (see [http://www.gasresources.net/ results]). *[http://www.gasresources.net/DisposalBioClaims.htm Dismissal of the Claims of a Biological Connection for Natural Petroleum.] *[http://www.aapg.org/explorer/2002/11nov/abiogenic.cfm Abiogenic Gas Debate 11:2002 (EXPLORER)] *Abiogenic petroleum origin ==Composition== In refining, the component chemicals of petroleum are separated by distillation. Products based on refined crude oil include kerosene, benzene, gasoline, paraffin wax, asphalt, etc. Subtler techniques, such as gas chromatography, HPLC, and GC-MS, can separate some fractions of petroleum into individual compounds. Strictly speaking, petroleum consists of hydrocarbons: compounds of hydrogen and carbon; and non-hydrocarbon fractions: compounds which might also include nitrogen, sulfur, oxygen, or traces of metals such as vanadium or nickel. The four lightest alkanes — CH4 (methane), C2H6 (ethane), C3H8 (propane) and C4H10 (butane) — are all gases, boiling at -161.6°C, -88.6°C, -42°C, and -0.5°C, respectively (-258.9°, -127.5°, -43.6°, and +31.1° F). The chains in the C5-7 range are all light, easily vaporized, clear Naphtha. They are used as solvents, dry cleaning fluids, and other quick-drying products. The chains from C6H14 through C12H26 are blended together and used for gasoline. Kerosene is made up of chains in the C10 to C15 range, followed by diesel fuel/heating oil (C10 to C20) and heavier fuel oils as the ones used in ship engines. These petroleum compounds are all liquid at room temperature. Lubricating oils and semi-solid greases (including Vaseline®) range from C16 up to C20. Chains above C20 form solids, starting with paraffin wax, then tar and asphaltic bitumen. Boiling ranges of petroleum atmospheric pressure distillation fractions in degrees Celsius: * petrol ether: 40 - 70 °C (used as solvent) * light petrol: 60 - 100 °C (automobile fuel) * heavy petrol: 100 - 150 °C (automobile fuel) * light kerosene: 120 - 150 °C (household solvent and fuel) * kerosene: 150 - 300 °C (jet engine fuel) * gas oil: 250 - 350 °C (Diesel fuel/ heating) * lubrication oil: > 300 °C (engine oil) * remaining fractions: tar, asphalt, residual fuel ==Extraction== Generally the first stage in the extraction of crude oil is to drill a well into the underground reservoir. Historically, in the USA some oil fields existed where the oil rose naturally to the surface, but most of these fields have long since been depleted, except for certain remote locations in Alaska. Often many wells will be drilled into the same reservoir, to ensure that the extraction rate will be economically viable. Also some wells may be used to pump water, steam or various gas mixtures into the reservoir to raise or maintain the reservoir pressure, and so maintain an economic extraction rate. If the underground pressure in the oil reservoir is sufficient, then the oil will be forced to the surface under this pressure. Gaseous fuels or natural gas are usually present, which also supplies needed underground pressure. In this situation it is sufficient to place a complex arrangement of valves on the well head to connect the well to a pipeline network for storage and processing. This is called primary oil recovery. Usually, only about 20% of the oil in a reservoir can be extracted this way. Over the lifetime of the well the pressure will fall, and at some point there will be insufficient underground pressure to force the oil to the surface. If economical, and it often is, the remaining oil in the well is extracted using secondary oil recovery methods. see: Energy balance and Net energy gain. Secondary oil recovery uses various techniques to aid in recovering oil from depleted or low-pressure reservoirs. Sometimes pumps, such as Nodding donkey and Electrical Submersible Pumps (ESPs), are used to bring the oil to the surface. Other secondary recovery techniques increase the reservoir's pressure by Water Injection, natural Gas reinjection and Gas Lift, which injects air, carbon dioxide or some other gas into the reservoir. Together, primary and secondary recovery allow 25 to 35% of the reservoir's oil to be recovered. Tertiary oil recovery reduces the oil's viscosity to increase oil production. Tertiary recovery is started when secondary oil recovery techniques are no longer enough to sustain production, but only when the oil can still be extracted profitably. This depends on the cost of the extraction method and the current price of crude oil. When prices are high, previously unprofitable wells are brought back into production and when they are low, production is curtailed. Thermally-enhanced oil recovery methods (TEOR) are tertiary recovery techniques that heat the oil and make it easier to extract. Steam injection is the most common form of TEOR, and is often done with a cogeneration plant. In this type of cogeneration plant, a gas turbine is used to generate electricity and the waste heat is used to produce steam, which is then injected into the reservoir. This form of recovery is used extensively to increase oil production in the San Joaquin Valley, which has very heavy oil, yet accounts for 10% of the United State's oil production. In-situ burning is another form of TEOR, but instead of steam, some of the oil is burned to heat the surrounding oil. Occasionally, detergents are also used to decrease oil viscosity. Tertiary recovery allows another 5 to 15% of the reservoir's oil to be recovered. ==History== The first oil wells were drilled in China in the 4th century or earlier. The oil was burned to evaporate brine and produce sodium chloride. By the 10th century, extensive bamboo pipeline transport connected oil wells with salt springs. The modern history of oil began in 1853, with the discovery of the process of oil distillation. Crude oil was distilled into kerosene by Ignacy Lukasiewicz, a Polish scientist. The first "rock oil" mine was created in Bobrka, near Krosno in southern Poland in the following year and the first refinery (actually a distillery) was built in Ulaszowice, also by Lukasiewicz. The American petroleum industry began with Edwin Drake's discovery of oil in 1859, near Titusville, Pennsylvania. The industry grew slowly in the 1800s and did not become a real national concern until the early part of the 20th century; the introduction of the internal combustion engine provided a demand that has largely sustained the industry to this day. Early "local" finds like those in Pennsylvania and Ontario were quickly exhausted, leading to "oil booms" in Texas, Oklahoma, and California. Other countries had sizable oil reserves as a part of their colonial holdings, and started to develop them at an industrial level. While even in 1955 coal was still the world's foremost fuel, oil began to take over. Following the 1973 energy crisis and the 1979 energy crisis there was significant media coverage of oil supply levels. This brought to light the concern that oil is a limited resource that will eventually run out, at least as an economically viable energy source. At the time, the most common and popular predictions were always quite dire, and when they did not come true, many dismissed all such discussion. The future of petroleum as a fuel remains somewhat controversial. USA Today news (2004) reports that there are 40 years of petroleum left in the ground. Some would argue that because the total amount of petroleum is finite, the dire predictions of the 1970s have merely been postponed. Others argue that technology will continue to allow for the production of cheap hydrocarbons and that the earth has vast sources of unconventional petroleum reserves in the form of tar sands, bitumen fields and oil shale that will allow for petroleum use to continue for an extremely long period in the future. Today about 90% of vehicular fuel needs are met by oil. Petroleum also makes up 40% of total energy consumption in the United States, but is responsible for only 2% of electricity generation. Petroleum's worth as a portable, dense energy source powering the vast majority of vehicles and as the base of many industrial chemicals makes it one of the world's most important commodities. Access to it was a major factor in several military conflicts, including World War II and the Persian Gulf War. About 80% of the world's readily accessible reserves are located in the Middle East. USA territory has less than 3%. ==Environmental effects== The presence of oil has significant social and environmental impacts, from accidents and routine activities such as seismic exploration, drilling, and generation of polluting wastes. Oil extraction is costly and sometimes environmentally damaging, although Dr. John Hunt from Woods Hole pointed out in a 1981 paper that over 70% of the reserves in the world are associated with visible macroseepages, and many oil fields are found due to natural leaks. Offshore exploration and extraction of oil disturbs the surrounding marine environment. Extraction may involve dredging, which stirs up the sea bed, killing the sea plants that marine creatures need to survive. Crude oil and refined fuel spills from tanker ship accidents have damaged fragile ecosystems in Alaska, the Galapagos Islands, Spain, and many other places. Renewable energy source alternatives do exist, although the degree to which they can replace petroleum and the possible environmental damage they may cause is controversial. == Future of oil == ''Main article: Hubbert Peak'' The Hubbert peak theory, also known as peak oil, is a controversial theory concerning the long-term rate of conventional oil and other fossil fuel production and depletion. It assumes that oil reserves are not replenished, and predicts that future world oil production must inevitably reach a peak and then decline as these reserves are exhausted. Much of the controversy is over whether past production or discovery data can be used to predict a future peak. Based on available production data, proponents have previously (and incorrectly) predicted the peak years to be 1989, 1995, or 1995-2000, however these predictions date from before the recession of the early 1980's, and the consequent reduction in global consumption, the effect of which was to delay the date of any peak by several years. A new prediction by Goldman Sachs picks 2007 for oil and some time later for natural gas. == Classification == The oil industry classifies "crude" by the location of its origin (e.g., "West Texas Intermediate, WTI" or "Brent") and often by its relative weight (API gravity) or viscosity ("light", "intermediate" or "heavy"); refiners may also refer to it as "sweet", which means it contains relatively little sulfur, or as "sour", which means it contains substantial amounts of sulfur and requires more refining in order to meet current product specifications. The world reference barrel (unit)s are: * Brent Blend, comprising 15 oils from fields in the Brent Oilfield and Ninian systems in the East Shetland Basin of the North Sea. The oil is landed at Sullom Voe terminal in the Shetlands. Oil production from Europe, Africa and Middle Eastern oil flowing West tends to be priced off the price of this oil, which forms a benchmark. See also Brent crude. * West Texas Intermediate (WTI) for North American oil. * Dubai used as benchmark for the Asia-Pacific region for Middle East Oil * Tapis (from Malaysia, used as a reference for light Far East oil) * Minas (from Indonesia, used as a reference for heavy Far East oil) * The OPEC Basket consisting of ** Arab Light Saudi Arabia ** Bonny Light Nigeria ** Fateh Dubai ** Isthmus Mexico (non-OPEC) ** Minas Indonesia ** Saharan Blend Algeria ** Tia Juana Light Venezuela OPEC attempts to keep the price of the Opec Basket between upper and lower limits, by increasing and decreasing production. This makes the measure important for market analysts. The OPEC Basket, including a mix of light and heavy crudes, is heavier than both Brent and WTI. See also [http://tonto.eia.doe.gov/ask/crude_types1.html] ==Pricing== References to the oil price are usually either references to the spot price of either WTI/Light Crude as traded on New York Mercantile Exchange (NYMEX) for delivery in Cushing, Oklahoma; or the price of Brent as traded on the International Petroleum Exchange (IPE) for delivery at Sullom Voe. The price of a barrel of oil is highly dependent on both its grade (which is determined by factors such as its specific gravity or API and its sulpher content) and location. The vast majority of oil will not be traded on an exchange but on a Over-the-counter_trading basis, typically with reference to a marker crude oil grade that is typically quoted via the pricing agency Platts. For example in Europe a particular grade of oil, say Fulmar, might be sold at a price of "Brent plus US$0.25/barrel".or as an intra-company transaction. IPE claim that 65% of traded oil is priced off their Brent benchmarks. Other important benchmarks include Dubai, Tapis, and the OPEC basket. The Energy Information Administration (EIA) uses the Imported Refiner Acquisition Cost, the weighted average cost of all oil imported into the US as their "world oil price". It is often claimed that OPEC sets the oil price and the true cost of a barrel of oil is around $2, which is equivalent to the cost of extraction of a barrel in the Middle East. These estimates of costs ignore the cost of finding and developing oil reserves. Furthermore the important cost as far as price is concerned, is not the price of the cheapest barrel but the cost of producing the marginal barrel. By limiting production OPEC has caused more expensive areas of production such as the North Sea to be developed before the Middle East has been exhausted. OPEC's power is also often overstated. Investing in spare capacity is expensive and the low oil price environment in the late 90s led to cutbacks in investment. This has meant during the oil price rally seen between 2003-2005, OPEC's spare capacity has not been sufficient to stabilise prices. Oil demand is highly dependent on global macroeconomic conditions, so this is also an important determinant of price. Some economists claim that high oil prices have a large negative impact on the global growth. This means that the relationship between the oil price and global growth is not particularly stable although a high oil price is often thought of as being a late cycle phenomenon. A recent low point was reached in January 1999, after increased oil production from Iraq coincided with the Asian financial crisis, which reduced demand. The prices then rapidly increased, more than doubling by September 2000, then fell until the end of 2001 before steadily increasing, reaching US $40 to US $50 per barrel by September 2004 (see Oil price increases of 2004). [http://futures.tradingcharts.com/chart/CO/M] In October 2004, light crude futures on the NYMEX for November delivery exceeded US $53 per barrel and for December delivery exceeded US $55 per barrel. Crude oil prices surged to a record high above $59 a barrel in June 2005, sustaining a rally built on strong demand for gasoline and diesel and on concerns about refiners' ability to keep up. The New York Mercantile Exchange (NYMEX) trades crude oil (including futures contracts) and provides the basis of US crude oil pricing via WTI (West Texas Intermediate). Other exchanges also trade crude oil futures, eg the International Petroleum Exchange (IPE) in London trades contracts in Brent crude. See also [http://www.wtrg.com/prices.htm History and Analysis of Crude Oil Prices] ==Top petroleum producing countries== (Ordered by amount ''produced'' in 2003): *Saudi Arabia (OPEC) *United States *Russia *Iran (OPEC) *Mexico *China *Norway *Canada *United Arab Emirates (U.A.E) (OPEC) *Venezuela (OPEC) *United Kingdom (U.K.) *Kuwait (OPEC) *Nigeria (OPEC) (Ordered by amount ''exported'' in 2003): *Saudi Arabia (OPEC) *Russia *Norway *Iran (OPEC) *United Arab Emirates (U.A.E) (OPEC) *Venezuela (OPEC) *Kuwait (OPEC) *Nigeria (OPEC) *Mexico *Algeria (OPEC) *Libya (OPEC) Note that the USA consumes almost all of its own production. Source: [http://www.eia.doe.gov/emeu/cabs/topworldtables1_2.html Energy Statistics from the U.S. Government] See also: Organization of Petroleum Exporting Countries. ==Related topics== * Abiogenic petroleum origin * List of oil fields * List of oil-producing states. * List of petroleum companies. * Energy crisis: 1973 energy crisis, 1979 energy crisis. * Fossil fuel. * Greenhouse gases. * History of the Petroleum Industry. * Hubbert peak (aka peak oil). * Future energy development. * 1990 spike in the price of oil * Non-conventional oil. * Oil imperialism. * Oil price increases of 2004 * Oil price increases of 2005 * Oil refinery. * Oil supplies. * Oil well. * Olduvai theory (not strictly about oil, but it basically assumes that oil and gas are the only significant energy sources). * Petroleum disasters. * Petroleum politics. * Renewable energy. * Thermal depolymerization. * Thomas Gold. ==External links== * [http://www.api.org/ American Petroleum Institute] - A site run by the American Petroleum Institute, the trade association of the US oil industry. * [http://www.eia.doe.gov/oil_gas/petroleum/info_glance/petroleum.html US Energy Information Administration] - Part of the informative website of the US Government's Energy Information Administration. * [http://www.geo.uw.edu.pl/BOBRKA/DATY/daty.htm Major dates of the Polish petroleum industry] *[http://www.gasresources.net/DisposalBioClaims.htm Dismissal of the Claims of a Biological Connection for Natural Petroleum.] *[http://www.aapg.org/explorer/2002/11nov/abiogenic.cfm Abiogenic Gas Debate 11:2002 (EXPLORER)] *[http://www.gasresources.net/Introduction.htm An introduction to the modern petroleum science, and to the Russian-Ukrainian theory of deep, abiotic petroleum origins.] *[http://www.spe.org/elibinfo/eLibrary_Papers/spe/1982/82UGR/00010836/00010836.htm Unconventional Ideas About Unconventional Gas (Society of Petroleum Engineers)] ===Articles=== * [http://pr.caltech.edu/periodicals/CaltechNews/articles/v38/oil.html The End of the Age of Oil] - article adapted from a talk by Caltech vice provost and professor of physics David Goodstein * [http://www.publicintegrity.org/oil/ The Politics of Oil] - A report on the oil industry's influence of lawmakers and public policy by the ''Center for Public Integrity''. * [http://news.bbc.co.uk/2/hi/business/3953907.stm BBC: Stability fears rise as oil reliance grows] * [http://www.washingtonpost.com/wp-dyn/content/article/2005/06/09/AR2005060900148_pf.html Top Saudi Says Kingdom Has Plenty of Oil] "261 billion barrels in reserve..." ===Data=== *[http://www.eia.doe.gov/emeu/international/petroleu.html Department of Energy EIA - World supply and consumption] * [http://www.eia.doe.gov/oil_gas/petroleum/info_glance/prices.html US petroleum prices] ==Books about the petroleum industry== * * * * * * * * * ==Films about petroleum== * * * * ** http://www.endofsuburbia.com * * * * * * * * * ==Writers covering the petroleum industry== *Colin Campbell (geologist) *Jay Hanson *Kenneth S. Deffeyes *David Goodstein *Daniel Yergin *Thomas Gold Fossil fuels Lubricants Materials Natural resources Peak oil Petroleum vi:Dầu mỏ
Petroleum
== Fraction table == Should the fraction list be made into a table? -User:Smack 01:12 20 Jun 2003 (UTC) == Word origin == I would just like to note that petroleum does not derive from latin but from the Greek words petra (meaning stone) and elaion (meaning oil). Although i am not an expert in linguistics i believe that those words existed in greek long before they were introduced in latin (and continue to exist today with the exact same spelling and meaning as 2000 years ago). Moreover the word in greek today is in fact petraileo. Until now origins of words have been very accurate in wikipedia so anyone knowing better than my self should be kind enough to correct me. Gerasimos Contoguris The English word petroleum is derived from (and identical to) the medieval Latin petroleum. One could trace that through pre-medieval Latin, to Greek, perhaps even back to Proto-Indoeuropean if one were so inclined, but I am of the opinion that the etymology presented should refer to how the word entered the English language, rather than its oldest known ancestors. Since the word entered from Latin, an explanation of the Latin roots should be sufficient. For the curious, the OED has it like this: [a. med.L. petroleum, f. L. petra (Gr.
Petroleum
Fossil fuels Hydrocarbons Economic geology Industries
See other meanings of words starting from letter:
P
PA | PB | PC | PD | PE | PF | PG | PH | PI | PJ | PK | PL | PM | PN | PO | PR | PS | PT | PU | PW | PX | PY | PZ |Words begining with Petroleum:
Petroleum
Petroleum
Petroleum
Petroleum_coke
Petroleum_companies_of_Canada
Petroleum_County
Petroleum_County,_Montana
Petroleum_County,_Montana
Petroleum_County,_Montana
Petroleum_County,_MT
Petroleum_crisis
Petroleum_Development_of_Oman
Petroleum_Development_Oman
Petroleum_disaster
Petroleum_Engineering
Petroleum_engineering
Petroleum_ether
Petroleum_geochemistry
Petroleum_geology
Petroleum_geology
Petroleum_Industry
Petroleum_industry
Petroleum_jelly
Petroleum_jelly
Petroleum_maturation
Petroleum_maturation
Petroleum_politics
Petroleum_production
Petroleum_products
Petroleum_products
Petroleum_refinery
Petroleum_revenue_tax
Petroleum_V._Nasby
Petroleum_Vesuvius_Nasby
Petroleum_war
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