Fluid Geochemical Features and Preservation Conditions of Marine Stratum in Typical Structure of Jianghan Plain Area  

作　　者：徐国盛 龚德瑜 袁海锋 李昌鸿 王国芝 胡晓凤 林娟华 朱建敏 

机构地区：[1]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology [2]Institute of Exploration and Exploitation,Jianghan Oil Field Branch of SINOPEC

出　　处：《Journal of Earth Science》2011年第6期768-779,共12页地球科学学刊（英文版）

基　　金：supported by the Major Project of Chinese National Programs for Fundamental Research and Development 973 Program (No. 2012CB214805)

摘　　要：Many scholars carried out large quantity of researches on oil and gas preservative condi-tions of marine carbonate rocks from the aspects of cap rocks,faults,formation water,hydrodynamic,and tectonism.This article gives dynamic evaluation on oil and gas preservative conditions of marine stratum in Jianghan（江汉） plain of multiphase tectonic disturbance from the view of paleofluid geo-chemistry.The conclusion shows that there mainly existed fluid filling of two periods in the reservoir of Lower-Middle Triassic to Permian.The fluid filled in the earlier period came from Lower Palaeozoic.The interchange of fluid in Lower-Middle Triassic to Permian suggested the oil and gas in Lower Pa-laeozoic had been broken up.The fluid filled in the later period（Lower-Middle Triassic to Permian） came from the same or adjacent strata and lacked anatectic fluidogenous features coming from Palaeozoic.With good preservative conditions of bulk fluid at the time,the fluid of Lower-Middle Triassic to Permian and that of Lower Palaeozoic did not connect with each other.However,the hydrocarbon generation peak of marine source rocks had passed or the paleo-oil and gas reser-voirs had been destroyed at that time and the marine stratum of Palaeozoic to Triassic in the research area did not put out commercial oil and gas flow.Many scholars carried out large quantity of researches on oil and gas preservative condi-tions of marine carbonate rocks from the aspects of cap rocks,faults,formation water,hydrodynamic,and tectonism.This article gives dynamic evaluation on oil and gas preservative conditions of marine stratum in Jianghan（江汉） plain of multiphase tectonic disturbance from the view of paleofluid geo-chemistry.The conclusion shows that there mainly existed fluid filling of two periods in the reservoir of Lower-Middle Triassic to Permian.The fluid filled in the earlier period came from Lower Palaeozoic.The interchange of fluid in Lower-Middle Triassic to Permian suggested the oil and gas in Lower Pa-laeozoic had been broken up.The fluid filled in the later period（Lower-Middle Triassic to Permian） came from the same or adjacent strata and lacked anatectic fluidogenous features coming from Palaeozoic.With good preservative conditions of bulk fluid at the time,the fluid of Lower-Middle Triassic to Permian and that of Lower Palaeozoic did not connect with each other.However,the hydrocarbon generation peak of marine source rocks had passed or the paleo-oil and gas reser-voirs had been destroyed at that time and the marine stratum of Palaeozoic to Triassic in the research area did not put out commercial oil and gas flow.

关 键 词：fluid geochemistry preservative condition of oil and gas marine stratum Jiang-han plain. 

分 类 号：P744.4[天文地球—海洋科学]