鄂尔多斯盆地东部奥陶系盐下储层及成藏条件分析  

ORDOVICIAN UNDER-SALT RESERVOIRS AND FORMING CONDITIONS OF GAS POOLS IN EASTERN ORDOS BASIN

作　　者：夏明军[1] 郑聪斌[2] 戴金星[1] 邹才能[1] 汪泽成[1] 王兰萍[2] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油长庆油田分公司勘探开发研究院,陕西西安710021

出　　处：《天然气地球科学》2007年第2期204-208,共5页Natural Gas Geoscience

基　　金：国家重大基础研究发展规划"973"项目(编号:2001CB209100)资助

摘　　要：鄂尔多斯盆地东部奥陶系马家沟组盐下具有马五7、马五9、马四上、马二1和马二2等5个储集层,储层的孔隙度普遍较低,而渗透率相对较好。根据盐下探井观察,盐间白云岩不仅有明显的烃类生成和聚集现象,而且在溶孔型储层中已见碳质沥青充填,并且生储盖配置良好,圈闭类型多样,具有形成盐间、盐下气藏的地质条件,是值得开拓的天然气勘探新领域。O1m5^7, O1m5^9, the upper O1m4 member, O1m2^1 and O1m2^2 are the five reservoirs located below the salt of the Ordovician Majiagou formation in eastern Ordos basin. The porosity of these reservoirs is generally low, but they have a relatively high permeability. Observation from the under-salt exploration wells demonstrates that the under-salt dolomite take on an obvious phenomenon of hydrocarbon generation and accumulation. Carbonaceous asphalt fills the dissolved reservoirs, and there are excellent source-reservoirseal association and various types of traps. Having these geologic conditions of forming under-salt gas pools, the under-salt dolomite is a new favorable gas exploration area.

关 键 词：鄂尔多斯盆地东部 盐下 储层 生烃 圈闭 

分 类 号：TE122.2[石油与天然气工程—油气勘探]