摘要
鄂尔多斯盆地南部镇泾地区中生界烃源岩发育,有机质丰度高、成熟度高。区块延长组以三角洲—湖泊沉积体系为主,三角洲前缘砂体为油气聚集提供了良好的储集空间,储盖配置良好,形成多套有利的储盖组合。该区储层为低孔低渗特低渗为主,主要目的层含油普遍,油层厚度大,但油层产量悬殊,单井产量明显受孔渗条件直接影响。区内构造简单,主要以岩性圈闭及岩性+低幅度构造复合圈闭为主,西倾单斜构造对油气聚集成藏有一定的控制作用。泥岩欠压实形成的过剩压力是油气初次运移的动力,裂缝、微裂缝及连片发育的砂体为油气纵横向运移的通道。
In south of Ordos basin Zhenjing region, mesozoic hydrocarbon source rock developed with a high abundance of organic matter and high maturity. Extension of blocks to extend are mainly delta-lacustrine system. Tthe front sand-stone of delta provided a good reservoir space for oil and gas gathering, reservoir and cap properly well configured to form multiple sets of favorable reservoir-cap combination. Simple structure in region , mainly are lithologic traps and lithology + low-amplitude structural combination traps,xiqing monoclinic structure has certain control to the oil and gas formation. Low porosity and low permeability, ultralow permeability within this reservoir and in target reservoir, oil-bearing layer is general, reservoir thickness islarge, but the reservoir output uneven. Single well production was significantly affected by the porosity and permeability. The excess pressure formed by Mudstone undercompaction is the initial migration of oil and gas power. The cracks,micro-cracks and contiguous development sand body are the pathway of oil and gas in vertical and horizontal channels.
出处
《石油地质与工程》
CAS
2009年第5期12-14,3,共3页
Petroleum Geology and Engineering
关键词
鄂尔多斯盆地南部
镇泾地区
油气成藏
主控因素
south Ordos basin
Zhenjing region
oil and gas formation reservoir
main control factors
