Archive:Petroleum seep: Difference between revisions
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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. | 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. | 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.<ref>http://seeps.wr.usgs.gov/ Natural Oil and Gas Seeps in California</ref> | ||
Petroleum seeps may be a significant source of [[pollution]]. | |||
==Coal Oil Point Seep Field== | ==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. | 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.<ref name=UCSB> http://seeps.geol.ucsb.edu/ Hornafius et al.</ref> | ||
This seep also releases on the order of 100 to 150 barrels of liquid petroleum per day. | This seep also releases on the order of 100 to 150 barrels of liquid petroleum per day. The field produces about 9 [[cubic meter]]s of natural gas per barrel of petroleum.<ref name=UCSB/> | ||
==See also == | ==See also == | ||
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==References== | ==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/] | * 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/] | ||
{{Geology-stub}} | |||
[[Category:Economic geology]] | [[Category:Economic geology]] | ||
[[Category:Hydrogeology]] | [[Category:Hydrogeology]] | ||
Revision as of 13:40, 31 July 2008
Template:Wiktionarypar 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.[1]
Petroleum seeps may be a significant source of pollution.
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 kilometers, and releases about 40 tons per day of methane and about 19 tons of reactive organic gas (ethane, propane, butane and higher hydrocarbons), 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 kilometers long and when degraded by evaporation and weathering, produces tar balls which wash up on the beaches for miles around.[2]
This seep also releases on the order of 100 to 150 barrels of liquid petroleum per day. The field produces about 9 cubic meters of natural gas per barrel of petroleum.[2]
See also
References
- ↑ http://seeps.wr.usgs.gov/ Natural Oil and Gas Seeps in California
- ↑ 2.0 2.1 http://seeps.geol.ucsb.edu/ Hornafius et al.
- 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]