https://ideawaza.com/api.php?action=feedcontributions&feedformat=atom&user=67.158.66.240 2026-09-29T16:44:08Z User contributions MediaWiki 1.46.0 https://ideawaza.com/index.php?title=Archive:Petroleum_seep&diff=49167 2008-10-10T23:48:13Z

<p>67.158.66.240: /* Coal Oil Point seep field */ link went to the .tar file format, which is nonsensical in this context</p> <hr /> <div>:''For other uses of &quot;seep&quot; see [[Seep (disambiguation)]]'' <br /> <br /> 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.&lt;ref&gt;http://seeps.wr.usgs.gov/ Natural Oil and Gas Seeps in California&lt;/ref&gt;<br /> <br /> Petroleum seeps may be a significant source of [[pollution]].<br /> <br /> ==Coal Oil Point seep field==<br /> <br /> 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 balls which wash up on the [[beach]]es for miles around.&lt;ref name=UCSB&gt; http://seeps.geol.ucsb.edu/ Hornafius et al.&lt;/ref&gt;<br /> <br /> 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.&lt;ref name=UCSB/&gt;<br /> <br /> ==References==<br /> {{Reflist}}<br /> * Hornafius, J.S.Quigley, D.C., and Luyendyk, B.P. &quot;The world's most spectacular marine hydrocarbon seeps (Coal Oil Point, Santa Barbara Channel, California): Quantification of Emissions&quot;, Journal of Geophysical Research, v.104, n. C9, pp. 20,703-20,711, September 15, 1999. [http://seeps.geol.ucsb.edu/]<br /> <br /> {{Geology-stub}}<br /> [[Category:Economic geology]]<br /> [[Category:Petroleum]]</div>

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