摘要
苏北盆地以常压盆地著称,针对局部异常高压,利用实测资料结合测井压力预测,分析高邮凹陷北斜坡阜宁组地层压力纵向及平面分布特征;应用流体包裹体热动力学模拟方法恢复古压力,分析异常高压演化特征及其成因机制;探讨异常高压下油气成藏特征,并建立不同压力系统下油气运聚模式。研究表明:阜宁组在成藏期已发育异常高压,经历复杂增压—降压—缓慢增压过程后,至今仍在一定范围内保存异常幅度;异常高压为内坡阜宁组形成富集油藏提供重要动力条件,尤其对源下油气成藏起到明显控制作用。异常高压发育特征研究对拓展内坡油气勘探提供重要理论基础。
The Subei Basin is generally a normal pressure basin.For local abnormal high-pressure,using measured data,combined with pressure prediction of logging,the longitudinal and horizontal distribution characteristics of formation pressure was systematically analyzed in Funing Formation of the northern slope of Gaoyou Sag.Using the fluid inclusion thermal dynamics simulation method to restore paleopressure,it was analyzed the evolution characteristics and genetic mechanism of abnormal high-pressure.On this basis,the characteristics of hydrocarbon accumulation were discussed under abnormal high-pressure.And then the hydrocarbon migration and accumulation modes were established under different pressure systems.The results indicated that Funing Formation in the hydrocarbon accumulation period has been developed to be abnormal high-pressure,and to date still preserves the abnormal amplitude within a certain extent after the process of complex pressurization,step-down and slow turbocharging.The abnormal high-pressure provides important dynamic conditions for the formation of enriched reservoirs in the Funing Formation,especially controlling the hydrocarbon accumulation under source rocks.The research results provide an important theoretical basis for expanding the hydrocarbon exploration in the inner slope of Gaoyou Sag.
作者
钱诗友
郑元财
吴峰
李纯泉
QIAN Shiyou;ZHENG Yuancai;WU Feng;LI Chunquan(Exploration and Development Research Institute of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China;Key Laboratory of Tectonics and Petroleum Resources,China University of Geosciences,Ministry of Education,Wuhan 430074,China)
出处
《复杂油气藏》
2018年第2期31-37,共7页
Complex Hydrocarbon Reservoirs
基金
中国石油化工集团公司科技攻关项目"苏北盆地油气聚集规律及精细评价关键技术"(ZDP17010)
江苏油田分公司科技攻关项目"高邮凹陷北斜坡阜宁组异常高压与油藏关系研究"(JS15001)
关键词
异常高压
油气成藏
阜宁组
北斜坡
高邮凹陷
abnormal high-pressure
hydrocarbon accumulation
Funing Formation
northern slope
Gaoyou Sag
