惠民凹陷南部地区断层输导与封闭性能研究  

Main controlling factors analysis and evaluation on transporting and sealing performance of fault,south region of Huimin depression

作　　者：李继岩[1,2] 宋国奇[3] 赵仲祥[1] 吴孔友[1] 王晓蕾[1] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266555 [2]中国石化股份胜利油田分公司,地质科学研究院,山东东营257015 [3]中国石化股份胜利油田分公司,山东东营257001

出　　处：《油气地质与采收率》2011年第4期17-20,112,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金项目“不整合纵向结构特征及其控藏作用”(40772081);国家科技重大专项“中国陆上地层油气藏形成主控因素与成藏模拟研究”(2008ZX05001)

摘　　要：断层是惠民凹陷南部地区油气运移的主要通道,主要油源断层的输导与封闭性决定了该区油气富集程度。利用断裂活动期与油气运移期的匹配关系,研究了该区主要断裂输导与封闭性能的时间变化规律,活动期断层对油气起输导作用,静止期其输导与封闭性能受到很多地质因素影响。采用定量方法对该区夏口断层、营子街断层、玉皇庙南断层的封闭性进行单因素研究,并利用模糊评价方法,分别对其进行了综合评价。结果表明,该区断层静止期,沿断层走向,其输导与封闭性能具有一定的变化规律。沿夏口断层走向,夏23—夏37井区附近封闭性差,夏37井区附近封闭性中等,夏37—夏224井区西侧封闭性较差,夏224—夏223井区附近封闭性中等,夏口断层的最东段封闭性变差;营子街断层自西向东封闭性由差变好;玉皇庙南断层的封闭性整体较好,但是断层东、西段封闭性好,中段封闭性差。该区断层输导与封闭的主控因素有断层活动性及断距、断层走向与倾角、泥岩涂抹系数。Fault is the main pathway of hydrocarbon migration in south region of Huimin depression,and also can form the associated reservoirs.Sealing and transporting capability of the main oil source fault determines the extent of hydrocarbon accumulation in this area.In this paper,by using the matching relation between the fault activity periods and oil-gas migration periods,we can find variation of main faults in terms of transporting and sealing capacity along with time in this area.The fault can seal oil-gas during the active stage,while transporting and sealing capacity of fault depends on many geological factors in the still-stand period, for example,shale gouge ratio,R_m,stress of fault section,closure index.Through quantitative methods,single-factor of the fault is analyzed,and finally,fuzzy comprehensive evaluation is implemented.It is suggested that the transporting and sealing capacity of fault has variations along with the fault strike in the still-stand period.Along the trend of Xiakou fault,sealing capacity is low near Xia 23-Xia 37 well area,and secondary near Xia 37 well area,it is poor near the west of Xia 37- Xia 224 well area and secondary near Xia 224-Xia 223 well area,while it is poor in the most east of the Xiakou fault.Sealing is better from west to east of the Yingzijie fault,and the whole sealing of south fault of Yuhuangmiao is good,but it is better in the east and west of the fault,the mid part is worse.In conclusion,the main control factors of fault sealing and transporting capability include fault activity and fault throw,strike and dip and shale smear factor in this area.

关 键 词：断层 输导与封闭性能 主控因素 断裂活动期 油气运移期 惠民凹陷南部地区 

分 类 号：TE112.321[石油与天然气工程—油气勘探]