镇泾地区延安组油气成藏特征与勘探方向  

CHARACTERISTICS OF RESERVOIR FORMING AND EXPLORATION PROSPECTS OF YAN＇AN FORMATION IN ZHENJING AREA

作　　者：王震[1] 李仲东[2] 袁京素[2] 王君[3] 

机构地区：[1]中海油田服务股份有限公司油田生产事业部,河北燕郊065201 [2]成都理工大学“油气藏地质及开发工程”国家重点实验室,四川成都610059 [3]中国石油华北油田采油一厂地质所,河北任丘060552

出　　处：《大庆石油地质与开发》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）.

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.

关 键 词：镇泾地区 古地貌 延安组 成藏特征 勘探方向 

分 类 号：TE122.3[石油与天然气工程—油气勘探]