沉积学报2012，Vol.30Issue(1)：197-203,7.
渤海湾盆地东营凹陷沙四下亚段地层压力演化与天然气成藏
Pressure Evolution and Gas Accumulation of the Fourth Member of the Shahejie Formation in Dongying Depression,Bohai Bay Basin
摘要
Abstract
After the paleo-pressure build-up by means of measured pressure,mudstone sonic log interval and fluid inclusions,the pressure evolution model of the fourth member of the Shahejie Formation is analyzed in Minfeng area,Dongying depression.The results show that,different periods of reservoir formation correspond to different pressure system in Es4 reservoir,Minfeng area： the hydrocarbon accumulation of Sha 2-last stage of Dongying was accomplished in a higher pressure system;the hydrocarbon accumulation environment of the last stage of Ng was normal pressure;and after the middle and late period of Nm the cracking gas in the central area of sub sag was formed in a high pressure system.The dynamic evolution process of formation pressure is the results of integrated effect of multiple factors,the first high pressure was due to uncompaction of the high-rate deposition of the formation,and the hydrocarbon-generation made a little contribution;a large amount of hydrocarbon played an important part in the form of the second high pressure,in addition,the sedimentation acted as the auxiliary role.Under the influence of the decrease of geothermal gradient,fracture,sand body-pressure discharge and the deep-burial of gas reservoir,the gas reservoir founded in Sha 4 reservoir,Minfeng area is mainly normal pressure.关键词
渤海湾盆地/东营凹陷/裂解气/成藏动力/地层压力演化Key words
Dongying depression/cracking gas/dynamic hydrocarbon accumulation/paleo-pressure分类
能源科技引用本文复制引用
刘华,蒋有录,宋国奇,蔡东梅,徐昊清..渤海湾盆地东营凹陷沙四下亚段地层压力演化与天然气成藏[J].沉积学报,2012,30(1):197-203,7.基金项目
国家“十五”科技攻关项目 （）
中国石油大学（华东）自主创新项目资助 （）
