摘要
为了研究工区前侏罗系古地貌特征与延安组油气成藏之间的关系，通过印模法恢复镇泾地区前侏罗系古地貌，结合工区内已发现的延安组古地貌披盖油气藏的石油地质特征，研究延安组底部河道砂体分布与古地貌之间匹配关系、古地貌与油气分布之间的规律，分析延安组油气成藏特征。研究表明：由于T区古地貌格局造成的高差不同导致剥蚀面之上的沉积厚度产生差异，形成差异压实构造；延安组油层明显受砂体厚度和构造的控制，构造高部位的厚砂体是延安组油气成藏的关键。结合工区延安组成藏特征对该区进行油气分布有利区域预测，得到工区S2井区北北东及工区的东北角方向是下一步油气勘探的有利区。
To study the relationship between Pre-Jurassic palaeogeomorphology and hydrocarbon reservoir forming of Yan＇ an Formation in the work area, this paper restores the Pre-Jurassic palaeogeomorphology in Zhenjing area with impression method, combining petroleuml geology characteristics of palaeogeomorphology drape reservoirs in Yan＇ an Formation, which has been discovered in the work area. It studies the matching relationship between channel sand body distribution of bottom part of Yan＇ an Formation and palaeogeomorphology, and relationship between palaeogeomorphology and oil/gas distribution, and analyzes characteristics of reservoir forming in Yan＇ an Formation. Research shows that, because the different height difference caused by palaeogeomorphologic framework resuits in differences in sedimentation thickness on the exposure level, forming differential compaction structure; reservoirs in Yan＇ an Formation are obviously controlled by sand body thickness, and thick sand bodies on structural high part are the key factors of reservoir forming in Yan＇an Formation. Combining characteristics of reservoir forming in Yan＇an Formation in the work area, favorable areas for oil-gas distribution in the area are predicted. N by E of Well S2 and northeast corner in the work area are the favorable areas for further exploration.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2009年第1期22-25,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
国家“973”重点基础研究发展计划项目（2002CB211705）.
关键词
镇泾地区
古地貌
延安组
成藏特征
勘探方向
Zhenjing area
palaeogeomorphology
Yan＇ an Formation
characteristics of reservoir forming
explo-ration prospect
