济阳坳陷正反转构造发育特征与油气成藏  

Development Characteristics of Positive Inversion Tectonics and Its Controlling to Hydrocarbon Accumulation in Jiyang Depression

作　　者：李伟[1] 高日胜[2] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东省青岛市266555 [2]中国石油勘探开发研究院,北京100083

出　　处：《中国石油勘探》2010年第5期17-22,27,共7页China Petroleum Exploration

基　　金：教育部高等学校博士学科点新教师基金(20090133120003);全国油气资源战略选区调查与评价项目"华北上古生界油气资源战略选区"(2009-GYXQ17);中国石油大学(华东)引进人才科研基金(Y070124)

摘　　要：济阳坳陷正反转构造研究程度较低,整体缺乏系统、规律性的认识。以高精度的三维地震资料为基础,结合区域应力场及不整合面的发育特征,对济阳坳陷正反转构造进行了综合判识和解释,并论述了正反转构造发育与油气成藏的关系。结果表明:济阳坳陷典型的正反转构造主要发育在埕岛地区的埕北20断层及东营凹陷陈南断层东段,在断层上盘形成明显的反转挤压背斜,形成于晚白垩世和古近纪东营末区域挤压应力场背景之下;正反转构造的判识必须充分考虑区域构造应力场的转型、不整合发育特征、构造样式的差异性以及地层、沉积相特征;正反转构造的发育会改造先期形成油气藏、形成有利的背斜和不整合型圈闭、改善储集性能,可以形成有利的背斜型油气藏、地层超覆油气藏和不整合遮挡型油气藏。The study on positive inversion tectonics in Jiyang Depression is relatively insufficient, lacking systematic and regular research. Based on high-precision three-dimensional seismic data, combined with regional stress field and unconformity characteristics, the positive inversion tectonics in Jiyang Depression has been comprehensively identified and interpreted, and the relation between development characteristics of positive inversion tectonics and hydrocarbon accumulation has been discussed. The results show that the typical positive inversion tectonics mainly developed in Chengbei 20 Fault in Chengdao Area and the eastern section of Chennan Fault in Dongying Sag. The positive inversion tectonics shows obvious reversed compressional anticline in hanging wall and it formed under the background of regional compressional stress field in Upper Cretaceous and in the end of Dongying stage of Paleogene. The identification of positive inversion tectonics must be fully considered the transition of area stress, the development characteristic of unconformity, difference of tectonic style, stratum and sedimentary facies. The development of positive inversion not only can destroy or reform the existed reservoir, form favorable anticline and unconformity traps, improve reservoir property, but also be favorable to form reservoir of anticline, stratigraphic overlap and unconformity.

关 键 词：正反转构造 发育特征 油气成藏 济阳坳陷 

分 类 号：TE111.2[石油与天然气工程—油气勘探]