Archive:Petroleum seep: Difference between revisions

Latest revision as of 16:00, 7 June 2009

For other uses of "seep" see Seep (disambiguation)

A petroleum seep is a place where liquid or gaseous hydrocarbons escape to the surface through fractures and fissures in the rock and between geological layers. Petroleum seeps are quite common: California has thousands of them. Much of the petroleum discovered in California during the 19th century was from observations of seeps.^[1]

Petroleum seeps may be a significant source of pollution.

References

↑ http://seeps.wr.usgs.gov/ Natural Oil and Gas Seeps in California

Hornafius, J.S.Quigley, D.C., and Luyendyk, B.P. "The world's most spectacular marine hydrocarbon seeps (Coal Oil Point, Santa Barbara Channel, California): Quantification of Emissions", Journal of Geophysical Research, v.104, n. C9, pp. 20,703-20,711, September 15, 1999. [1]

[1] ttp://seeps.wr.usgs.gov/ Natural Oil and Gas Seeps in California

[1]

@@ Line 1: / Line 1: @@
-{{wiktionarypar|seep}}
+:''For other uses of "seep" see [[Seep (disambiguation)]]''
-A '''seep''' is a wet place where a [[liquid]], usually [[groundwater]], has oozed from the ground to the surface. Seeps are usually not flowing, with the liquid sourced only from underground.
-The term seep may also refer to the movement of liquid [[hydrocarbons]] to the surface through fractures and fissures in the rock and between [[geological]] layers. [[Petroleum]] seeps are quite common:  [[California]] has thousands of them.  Much of the petroleum discovered in California during the 19th century was from observations of seeps.
+A '''petroleum seep''' is a place where liquid or gaseous [[hydrocarbons]] escape to the surface through fractures and fissures in the rock and between [[geological]] layers. [[Petroleum]] seeps are quite common:  [[California]] has thousands of them.  Much of the petroleum discovered in California during the 19th century was from observations of seeps.<ref>http://seeps.wr.usgs.gov/ Natural Oil and Gas Seeps in California</ref>
-Seeps may be a significant source of [[pollution]].
+Petroleum seeps may be a significant source of [[pollution]].
-==Coal Oil Point Seep Field==
+==See also==
+*[[Coal Oil Point seep field]]
-One seep, the [[Coal Oil Point Seep Field]] offshore from [[Santa Barbara, California]] has a seep area of about three [[square kilometer]]s, and releases about 40 [[ton]]s per day of [[methane]] and about 19 tons of reactive organic gas ([[ethane]], [[propane]], [[butane]] and higher [[hydrocarbon]]s), which is about the same as that released by all the cars and trucks in the county. The liquid [[petroleum]] produces a slick that is many [[kilometer]]s long and when degraded by [[evaporation]] and [[weathering]], produces [[tar ball]]s which wash up on the [[beach]]es for miles around.
+*[[Tar pit]]
-This seep also releases on the order of 100 to 150 barrels of liquid petroleum per day. [http://seeps.geol.ucsb.edu/ Hornafius et al.]  The [[Monterey Formation]] contains about one billion barrels, so at the current leaking rate, it would be emptied of liquid petroleum in about 20 [[millennia]] if it were not being replenished.{{Fact|date=June 2008}}  The estimated lifetime of the [[natural gas]] component is even shorter. The field produces about 9 [[cubic meter]]s of natural gas per barrel of petroleum, and so there is about 9,000,000 cubic meters of gas in the reservoir. [http://seeps.geol.ucsb.edu/ Hornafius et al.]  The seep would deplete this amount of gas in about 150 years.
-==See also ==
-* [[Aquifer]]
-* [[Spring (hydrosphere)]]
 ==References==
+{{Reflist}}
 * Hornafius, J.S.Quigley, D.C., and Luyendyk, B.P. "The world's most spectacular marine hydrocarbon seeps (Coal Oil Point, Santa Barbara Channel, California): Quantification of Emissions", Journal of Geophysical Research, v.104, n. C9, pp. 20,703-20,711, September 15, 1999.  [http://seeps.geol.ucsb.edu/]
-==External links==
-* [http://seeps.wr.usgs.gov/ Natural Oil and Gas Seeps in California]
-* [http://seeps.geol.ucsb.edu/ Hydrocarbon Seeps] This UCSB site has a collection of papers describing a major seep just offshore from Santa Barbara, California.
 [[Category:Economic geology]]
-[[Category:Hydrogeology]]
+[[Category:Petroleum]]

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Latest revision as of 16:00, 7 June 2009

See also

References