济阳坳陷东营凹陷沙三中亚段流体包裹体古流体势场恢复

doi:10.11743/ogg20090103

Abstract

Abstract:

Based on the analyses of 376 samples of fluid inclusions from the middle Es³ in the Dongying sag,hydrocarbon charging in the study area was divided into three different stages with exact time.The evolution of paleo-formation pressure during these three charging stages was obtained through PVT thermodynamic modeling of the fluid inclusions.The results in combination with the plane and sectional views of current pressure distribution reveal that the hydrocarbon reservoirs in Es³ belong to the same pressure system.The evolution of paleo-fluid potential fields in Es³ during these three stages were reconstructed with the parameters obtained from fluid inclusion analysis and their distribution features were analyzed.The favorable areas for hydrocarbon accumulation during these three periods of hydrocarbon charging were discussed.It is believed that the reservoir distribution in the Dongying sag was closely related to the evolution of paleo-fluid potential,and the thresholds of paleo-fluid potential controlling hydrocarbon accumulation in these three charging periods were 7 kJ/kg,10.5 kJ/kg and 22 kJ/kg respectively.The northern slope of the Lijin subsag and the southern slope of the Niuzhuang subsag were the favorable areas for hydrocarbon accumulation during the first period of hydrocarbon charging;the surrounding areas of the Lijin and the Niuzhuang subsags(high oil potential centrers) were the favorable areas during the second period of hydrocarbon charging;while the surrounding areas of the Minfeng and the Boxing subsags were the favorable areas during the third period of hydrocarbon charging.

Key words: paleo-fluid potential field, hydrocarbon accumulation, fluid inclusion, Dongying Sag, Jiyang Depression

CLC Number:

TE112.1

Cai Limei, Chen Honghan, Li Chunquan, Li Zhaoqi, Liu Huimin, Hao Xuefeng. Reconstruction of the paleo-fluid potential field of Es³ in the Dongying Sag of the Jiyang Depression with systematic fluid inclusion analysis[J]. Oil & Gas Geology, 2009, 30(1): 17-25.

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Reconstruction of the paleo-fluid potential field of Es³ in the Dongying Sag of the Jiyang Depression with systematic fluid inclusion analysis

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Reconstruction of the paleo-fluid potential field of Es3 in the Dongying Sag of the Jiyang Depression with systematic fluid inclusion analysis

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Reconstruction of the paleo-fluid potential field of Es³ in the Dongying Sag of the Jiyang Depression with systematic fluid inclusion analysis