摘要
通过对鄂尔多斯盆地延长油田200余口探井泥岩压实曲线的研究,系统分析压实系数在平面上的分布特征,研究了压实系数与油藏分布的耦合、异常压力与油藏分布的耦合、压实系数与古构造的耦合,认为延长组沉积时期的古构造特征控制着研究区的岩性、岩相带,最终控制该区压实系数的分布特征。异常压力作用于不同层位的烃源岩而发生作用,因而异常压力及源岩的分布规律决定不同层位油藏分布。指出东部地区重点勘探长7、长9烃源层之上紧邻的油层组,而西部、南部长7—长10各油层组均为重点勘探层系,应继续深入研究压实系数与最大生烃时期各目的层古构造的耦合关系,研究长7张家滩、长9李家畔页岩的分布规律及生烃潜力。
According to the compaction curves of mudstones from over 200 wells in the Yanchang Oil Field of the Ordos Basin,the plane distribution of compaction coefficients was analyzed systematically.The coupling relationships between compaction coefficient ＆ reservoir distribution,abnormal pressure ＆ reservoir distribution,compaction coefficient ＆ paleostructure were studied.The paleostructures when the Yanchang Formation deposited controlled the lithology and lithofacies of the study area,and finally controlled the distribution of compaction coefficient.Abnormal pressures worked on source rocks in different strata.As a result,the distribution of abnormal pressures and source rocks determined the distribution of reservoirs in different strata.In the east of the study area,the exploration directions should be focused on the reservoir groups above the Chang 7 and Chang 9 source rocks.In the west and south of the study area,the reservoir groups from the Chang 7 to the Chang 10 should be targeted.The coupling relationship between compaction coefficient ＆ paleostructure during the maximum hydrocarbon generation stage was further studied.The distribution law and hydrocarbon generation potential of the Zhangjiatan shale in Chang 7 and the Lijiapan shale in Chang 9 were discussed.
出处
《石油实验地质》
CAS
CSCD
北大核心
2012年第5期459-465,共7页
Petroleum Geology & Experiment
基金
国家科技重大专项项目(2011ZX05001003
2008ZX05005-004-007HZ)资助
关键词
压实系数
古构造
勘探方向
延长组下部油藏
三叠系
延长油田
鄂尔多斯盆地
compaction coefficient
paleostructure
exploration direction
lower oil reservoirs of Yangchang Formation
Triassic
Yanchang Oil Field
Ordos Basin
