Bạch Hổ oil field

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The '''Bạch Hổ oil field''' ('''White Tiger oilfield''') is a major [[Petroleum reservoir|oil field]] in the [[Mekong|Cuu Long]] basin of the [[South China Sea|East Sea]] located offshore due east of the [[Mekong Delta]] of [[Vietnam]]. The field contains major reserves hosted within highly fractured granitic basement rocks. The Cuu Long basin is a [[rift]] zone developed during the [[Oligocene]] to Early [[Miocene]]. The rift occurred in [[Jurassic]] to Late [[Cretaceous]] [[granite]] to [[granodiorite]] intrusions.<ref name=Nguyen>Nguyen Du Hung and Hung Van Le, ''Petroleum Geology of Cuu Long Basin - Offshore Vietnam'', Search and Discovery Article #10062 (2004), http://www.searchanddiscovery.net/documents/2004/hung/index.htm</ref><ref>Tatyana Nickolaevna Nemchenko, ''Oil in Granites on Example of White Tiger Field, Vietnam'', AAPG & AAPG European Region Energy Conference and Exhibition (November 18–21, 2007) Technical Program (abstract) {{cite web|url=http://aapg.confex.com/aapg/2007int/techprogram/A113544.htm |title=Oil in Granites on Example of White Tiger Field, Vietnam |accessdate=2008-06-15 |url-status=dead |archiveurl=https://web.archive.org/web/2008120...nfex.com/aapg/2007int/techprogram/A113544.htm |archivedate=2008-12-04 }}</ref> The fractured granitic rocks occur as a [[horst (geology)|horst]] overlain and surrounded by Upper Oligocene [[Lake|lacustrine]] [[shale]] [[source rock]]s.<ref name=Nguyen/>	The '''Bạch Hổ oil field''' ('''White Tiger oilfield''') is a major [[Petroleum reservoir|oil field]] in the [[Mekong|Cuu Long]] basin of the [[South China Sea|East Sea]] located offshore due east of the [[Mekong Delta]] of [[Vietnam]]. The field contains major reserves hosted within highly fractured granitic basement rocks. The Cuu Long basin is a [[rift]] zone developed during the [[Oligocene]] to Early [[Miocene]]. The rift occurred in [[Jurassic]] to Late [[Cretaceous]] [[granite]] to [[granodiorite]] intrusions.<ref name=Nguyen>Nguyen Du Hung and Hung Van Le, ''Petroleum Geology of Cuu Long Basin - Offshore Vietnam'', Search and Discovery Article #10062 (2004), http://www.searchanddiscovery.net/documents/2004/hung/index.htm</ref><ref>Tatyana Nickolaevna Nemchenko, ''Oil in Granites on Example of White Tiger Field, Vietnam'', AAPG & AAPG European Region Energy Conference and Exhibition (November 18–21, 2007) Technical Program (abstract) {{cite web|url=http://aapg.confex.com/aapg/2007int/techprogram/A113544.htm |title=Oil in Granites on Example of White Tiger Field, Vietnam |accessdate=2008-06-15 |url-status=dead |archiveurl=https://web.archive.org/web/2008120...nfex.com/aapg/2007int/techprogram/A113544.htm |archivedate=2008-12-04 }}</ref> The fractured granitic rocks occur as a [[horst (geology)|horst]] overlain and surrounded by Upper Oligocene [[Lake|lacustrine]] [[shale]] [[source rock]]s.<ref name=Nguyen/>
Bạch Hổ is not the only oil field convincingly shown to be hosted in granite;<ref name=geofrc>http://www.geoscience.co.uk/geofrc/geobaseasia.html {{Webarchive|url=https://web.archive.org/web/20080723122042/http://www.geoscience.co.uk/geofrc/geobaseasia.html |date=2008-07-23 }} Basement reservoirs in Asia</ref> however, inspection of the seismic profile of the area shows [[Fault (geology)|faulted]] basement passive margin which is sealed by an onlapping [[sedimentary]] sequence.<ref name=AAPG>{{cite web|url=http://www.aapg.org/explorer/2005/02feb/vietnam.cfm|title=Explorer|work=aapg.org}}</ref><ref>Hydrocarbons in Crystalline Rocks, 242 pages, Geological Society of London; (January 2003) {{ISBN|1-86239-137-8}}</ref>	Bạch Hổ is not the only oil field convincingly shown to be hosted in granite;<ref name=geofrc>http://www.geoscience.co.uk/geofrc/geobaseasia.html {{Webarchive|url=https://web.archive.org/web/20080723122042/http://www.geoscience.co.uk/geofrc/geobaseasia.html |date=2008-07-23 }} Basement reservoirs in Asia</ref> however, inspection of the seismic profile of the area shows [[Fault (geology)|faulted]] basement passive margin which is sealed by an onlapping [[sedimentary]] sequence.<ref name=AAPG>{{cite web|url=http://www.aapg.org/explorer/2005/02feb/vietnam.cfm|title=Vietnam Finds Oil in the Basement|work=aapg.org |archive-url=https://web.archive.org/web/20051101140546/http://www.aapg.org/explorer/2005/02feb/vietnam.cfm |archive-date=2005-11-01 |url-status=dead}}</ref><ref>Hydrocarbons in Crystalline Rocks, 242 pages, Geological Society of London; (January 2003) {{ISBN|1-86239-137-8}}</ref>
It is plausible that the oil has migrated laterally from the lowermost, mature sediments into the fault systems within the granite. The [[seismic]] profile shows a definite basement [[Horst (geology)|horst]] with onlapping sedimentary [[source rock]]s, draped by a reservoir seal.<ref>http://www.aapg.org/explorer/2005/02feb/vietnamcuulong.cfm CuuLong</ref> This trap view would see the oil migrate up the horst bounding faults from the lower source units, into the trap unit draped over the top.	It is plausible that the oil has migrated laterally from the lowermost, mature sediments into the fault systems within the granite. The [[seismic]] profile shows a definite basement [[Horst (geology)|horst]] with onlapping sedimentary [[source rock]]s, draped by a reservoir seal.<ref>http://www.aapg.org/explorer/2005/02feb/vietnamcuulong.cfm CuuLong</ref> This trap view would see the oil migrate up the horst bounding faults from the lower source units, into the trap unit draped over the top.

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