东濮凹陷沙三段储层微裂缝发育特征及意义

Weibin LIU,Shiqi ZHANG,Shizhen LI,Xingui ZHOU,Dandan WANG,Wenhao ZHANG,Yanhua LIN

Geological Bulletin of China（2018）

Cited 3|Views8

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Abstract

利用微观薄片、物性、流体包裹体分析等,对东濮凹陷沙三段储层微裂缝的类型、特征、成因及其参数进行了研究.结果表明,东濮凹陷沙三段储层中发育穿粒缝、贴粒缝和粒内缝3种微裂缝.微裂缝的成因以构造作用为主,此外还有异常高压作用及成岩作用.东濮凹陷沙三段储层中的微裂缝规模中等、密集,平均长度为5.6mm,平均面密度为0.66cm/cm2,平均地下开度为8.6μm.微裂缝是该区重要的储集空间,对改善低孔低渗透砂岩储层的储集性能起重要的作用.

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Key words

microfractures,origin of microfractures,low-porosity and low-permeability reservoir,Es3,Dongpu depression

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