摘要
随着油气勘探与开发的不断深入,低渗透储层逐渐成为国内外油气勘探与开发的重要对象。通过调研低渗透储层的涵义与分类,结合塔里木盆地库车坳陷克拉苏冲断带白垩系低孔、低渗砂岩储层的研究,总结了研究区低渗透砂岩储层的特征,探讨了其成因机制及影响因素。研究表明:按成因不同,可将低渗透储层分为原生、次生与裂缝型3类;低渗透储层的形成是沉积作用、成岩作用与后期构造作用共同影响的结果。沉积作用是形成低渗透储层的根本原因,强烈的压实与胶结作用是形成低渗透储层的主要原因,溶蚀作用和后期构造破裂作用提高了低渗透储层的物性,是形成深层低渗有效储层的关键因素。
With the development of oil and gas exploration, the low permeability reservoirs have been a significant target of oil and gas exploration and development. Based on the study on Cretaceous low-porosity and low-permeability reservoir of Kelasu tectonic zone in Kuqa Depression, Tarim Basin, we summarized the characteristics of low permeability reservoir, and discussed its formation mechanisms and controlling factors. The result shows that low permeability reservoirs can be divided into 3 types accorded to the genetic differences： primary low permeability reservoir, secondary low permeability reservoir and fractured low permeability reservoir. The origin of the low permeability reservoir is impacted jointly by deposition, diagenesis and later tectonism. Deposition is the most fundamental reason for the low permeability reservoir, and strong compaction and cementation account mainly for it. Dissolution and later tectonic fractures increase the porosity and permeability of the reservoir, and that are the key factors for the low permeability in deep reservoir.
出处
《岩性油气藏》
CSCD
2014年第3期28-37,44,共11页
Lithologic Reservoirs
基金
国家重点基础研究发展计划(973)项目"中国西部叠合盆地深部油气复合成藏机制与富集规律"(编号:2011CB201104)
国家重大科技专项"岩性地层油气藏沉积体系
储层形成机理与分布研究"(编号:2011ZX05001-002)联合资助
