Application of typical profile to analysis of reservoir pressure evolution and hydrocarbon accumulation in Dongying Sag

ZHU Jinli; ZOU Yue; CHEN Dongxia

doi:10.3969/j.issn.1673-8926.2011.04.011

Lithologic Reservoirs >

2011 , Vol. 23 >Issue 4: 58 - 64

DOI: https://doi.org/10.3969/j.issn.1673-8926.2011.04.011

Application of typical profile to analysis of reservoir pressure evolution and hydrocarbon accumulation in Dongying Sag

ZHU Jinli ,
ZOU Yue ,
CHEN Dongxia

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1. State Key Laboratory of Petroleum Resources and Prospecting， China University of Petroleum， Beijing 102249， China； 2. College of Geosciences， China University of Petroleum， Beijing 102249， China； 3. Logging Technology Company， Shengli Oilfield Company Limited， Sinopec， Dongying 257096， China

Online published: 2011-08-20

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Abstract

Basin modeling technology is applied to analyze distribution and evolution characteristics of abnormal pressure system of Cenozoic in Dongying Sag. Based on the analysis of hydrocarbon accumulation stages, the influence of reservoir pressure evolution on the hydrocarbon accumulation is studied. Numerical modeling result shows that abnormally high pressures occur in the third and fourth members （Es3 and Es4） of Eocene Shahejie Formation, and the pressures are mainly overpressure. The overpressure evolution in the sag is fluctuating and divided into three stages: original-forming, medium-declining adjustment and latest-raising stages, respectively corresponding to the stage of Shahejie to the final stage of Dongying Formation, the stage of uplifting and denudation, and the stage of Guantao Formation to Quaternary depositional stage. The study of overpressure evolution and hydrocarbon accumulation stages shows that the reservoir which is in the overpressure environment now may not be in overpressure environment when the hydrocarbon accumulation occurred. In the early time, the overpressure is favorable power for hydrocarbon migration and accumulation in the lithologic reservoir, and conducive to the preservation of lithologic reservoir.

Key words： carbon isotope; gas-source correlation; natural gas origin; middle-shallow natural gas; the middle part of Western Sichuan Depression; Sichuan Basin

Cite this article

ZHU Jinli , ZOU Yue , CHEN Dongxia . Application of typical profile to analysis of reservoir pressure evolution and hydrocarbon accumulation in Dongying Sag[J]. Lithologic Reservoirs, 2011 , 23(4) : 58 -64 . DOI: 10.3969/j.issn.1673-8926.2011.04.011

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