摘要
勘探成果表明鄂尔多斯盆地陕北地区上古生界各层段均发现气层或含气显示层,具备了天然气成藏的基本地质条件。为研究控制上古生界天然气富集成藏的主要因素,指出有利勘探区域,对目的层沉积层序、沉积相特征、烃源岩特征和生烃能力以及储集层地质特征进行了深入研究并开展了天然气成藏控制因素分析。研究认为控制上古生界天然气富集成藏的主要因素是:烃源岩的展布范围和生烃能力、有利沉积相砂体的分布格局、现今低隆起构造高部位及其所形成的岩性圈闭或岩性-构造圈闭、生排烃时间和流体运聚指向区域。诸多油气聚集成藏地质条件的合理配置,构成了该区气藏发育区并控制了气藏的分布。同时,还指出延川西部、甘泉东部、延川地区、马家砭地区为天然气藏的有利聚集区域。
The exploration results shows that the gas or gas bearing zones have been found in each interval in the upper Palaeozoic in Shanbei area of Erdos Basin,which has the basic geologic conditions for natural gas reserving. In order to study the major factors that governed the natural gas rich reserving in the upper Palaeozoic and point out the prospecting area,the analysis for governing the reserving factors was made by deeply studying the characteristics for sedimentary sequence and facies of target stratum,the features of the hydrocarbon source rock and the hydrocarbon generating ability and the reservoir. The study showed that the major factors for governing the gas rich reserving are the spreading range and the hydrocarbon generating ability of the hydrocarbon source rock,the distributing pattern of the favorable sandbody of the sedimentary facies,the low rise structural location nowadays as well as the lithologic traps-lithologic structural traps formed,the time for hydrocarbon generating and discharging and the pointing area of fluid moving and gathering. The reasonable composition of these fine geologic conditions for oil and gas made the gas reservoir develop in the area and governed the distribution of it. Meanwhile,the authors pointed out that the west of Yanchuan,the east of Ganquan,Yanzhou area and Majiabian area are the favorable gathering area for natural gas.
出处
《录井工程》
2010年第4期49-54,共6页
Mud Logging Engineering
关键词
鄂尔多斯盆地
陕北地区
上古生界
天然气
成藏控制
因素分析
Erdos Basin,Shanbei area,the upper Palaeozoic,natural gas,reserving governing,factor analysis
作者简介
王永成工程师，1962年生，2005年亚洲澳门国际公开大学工商管理硕士研究生，主要从事石油勘探开发管理工作。现任陕西延长石油（集团）有限责任公司油气勘探公司总经理。通信地址：717300陕西省延安市宝塔区七里铺街油气勘探公司。电话：（029）38113348。
