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East Breaks hydrocarbon generation model (view source)
Revision as of 22:18, 12 March 2014
, 22:18, 12 March 2014→Generation and expulsion timing
Aburial history plot with computed hydrocarbon generation history shows that peak oil generation in the A-29 well began at the inferred base of the lower Miocene when buried below [[depth::11,000 ft]] (3000 m) about 1.2 Ma, at the base of the inferred middle Miocene when it too passed below [[depth::11,000 ft]] (3000 m) burial about 0.2 Ma.
Aburial history plot with computed hydrocarbon generation history shows that peak oil generation in the A-29 well began at the inferred base of the lower Miocene when buried below [[depth::11,000 ft]] (3000 m) about 1.2 Ma, at the base of the inferred middle Miocene when it too passed below [[depth::11,000 ft]] (3000 m) burial about 0.2 Ma.
Miocene source beds, if present, would be actively generating and expelling oil and gas at the present time. Dow et al.<ref name=ch04r29 /> interpret this to account for the biodegraded East Breaks 160-161 field oils being recharged with fresh oil during a later [[migration]] phase. The relatively low maturity of the inferred Miocene section should also result in only minor thermogenic gas generation and might explain the absence of evaporative fractionation in the produced crudes of this field in contrast to approximately 75% of Gulf Coast Tertiary crudes<ref name=ch04r96>Thompson, K. F. M., M. C. Kennicutt, and J. M. Brooks II, 1990, [http://archives.datapages.com/data/bulletns/1990-91/data/pg/0074/0002/0000/0187.htm Classification of offshore Gulf of Mexico oils and gas condensates]: AAPG Bulletin, vol. 74, p. 187–198.</ref>.
Miocene source beds, if present, would be actively generating and expelling oil and gas at the present time. Dow et al.<ref name=ch04r29 /> interpret this to account for the biodegraded East Breaks 160-161 field oils being recharged with fresh oil during a later [[migration]] phase. The relatively low maturity of the inferred Miocene section should also result in only minor thermogenic gas generation and might explain the absence of evaporative fractionation in the produced crudes of this field in contrast to approximately 75% of Gulf Coast Tertiary crudes.<ref name=ch04r96>Thompson, K. F. M., M. C. Kennicutt, and J. M. Brooks II, 1990, [http://archives.datapages.com/data/bulletns/1990-91/data/pg/0074/0002/0000/0187.htm Classification of offshore Gulf of Mexico oils and gas condensates]: AAPG Bulletin, vol. 74, p. 187–198.</ref>
==Burial history==
==Burial history==