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目的:为了确定造成鄂尔多斯盆地志丹双河油田长6油层低渗的原因。方法:本文在长6油层沉积特征的基础上,对储层岩石学、成岩作用、孔喉结构及物性特征进行分析、研究。结果:表明长6为三角洲前缘亚相沉积,其储层具有矿物成熟度低而结构成熟度高的岩石学特点,孔隙类型主要为粒间溶孔,孔喉以中、小孔-微喉型为主,属低孔低渗透储层。结论:沉积相带及成岩作用是影响储层物性的主要因素。
Objective: To determine the cause of the low permeability of Chang 6 reservoir in Zhidan Shuanghe Oilfield, Ordos Basin. Methods: Based on the sedimentary characteristics of Chang 6 reservoir, this paper analyzes and studies the reservoir petrology, diagenesis, pore-throat structure and physical properties. The results show that Chang 6 is a delta front facies subfacies, the reservoirs have the characteristics of low mineral maturity and high structural maturity. The types of pores are mainly intergranular dissolved pores, pore throats are medium and small pores - Type, is a low porosity and low permeability reservoir. Conclusion: Sedimentary facies belt and diagenesis are the main factors affecting reservoir physical properties.