苏北盆地张家垛油田阜三段油气富集规律

doi:10.11743/ogg20120202

Abstract

Abstract:

The 3^rd member of Funing Formation has a great potential for oil and gas exploration and will be one of the most important targets for reserve growth and production addition of SINOPEC Huadong Oilfield Company.However,the reservoir heterogeneity is strong and hydrocarbon enrichment patterns are poorly understood,seriously constraining future exploration and development.Based on study of the basic geologic conditions for source rocks,reservoirs,and traps,abnormal pressure is analyzed according to the rules of mudstones compaction.The abnormal pressures of Funing Formation are caused by ofundercompaction,instead of hydrocarbon generation of kerogen.The deep high-quality reservoirs are closely related with undercompaction and the high-quality reservoirs occur in areas where the abnormal pressure is high.The high abnormal pressure occurs in interval from the top 3^rd member to 4^th member of Funning Formation and forms a regional seal.Hydrocarbons mainly accumulate in low potential areas below this seal.High abnormal pressure favors hydrocarbon accumulation in the 3^rd member of Funning Formation,while low abnormal pressure may be favorable for hydrocarbon accumulation in the overlying Dainan Formation.Based on study of the regional high abnormal pressure seal and sedimentary microfa-cies,it is believed that the hydrocarbon accumulation conditions of the 3^rd member of Funning Formation are better to the south,thus the 3^rd member to the south is a favorable target for future exploration.

Key words: abnormal pressure, undercompaction, reservoir, the 3^rd member of Funing Formation, Zhangjiaduo oilfield, Subei Basin

CLC Number:

TE122.3

Jiao Lili. Hydrocarbon enrichment patterns of the 3^rd member of Funing Formation in Zhangjiaduo oilfield, Subei Basin[J]. Oil & Gas Geology, 2012, 33(2): 166-172.

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Hydrocarbon enrichment patterns of the 3^rd member of Funing Formation in Zhangjiaduo oilfield, Subei Basin

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Hydrocarbon enrichment patterns of the 3rd member of Funing Formation in Zhangjiaduo oilfield, Subei Basin

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Hydrocarbon enrichment patterns of the 3^rd member of Funing Formation in Zhangjiaduo oilfield, Subei Basin