现代地质2012，Vol.26Issue(4)：769-777,9.
鄂尔多斯盆地华庆地区延长组长6储层成岩相及微观孔隙结构
Diagenetic Facies and Micro-pore Structure of Chang 6 Reservoir in Yanchang Formation, Huaqing Area, Ordos Basin
摘要
Abstract
The physical property of Chang 6 reservoir was poor with strong heterogeneity in Yanchang Formation, Huaqing area, Ordos Basin. In this paper, casting thin sections, SEM, X-ray diffraction, physical properties , high pressure mercury injection and other analytical testing methods were used to analyze the diagenesis, diagenetic facies and micro-pore structure of the low permeability reservoir deeply. The results showed that; main reservior diagenetic facies were the hydromica cementation-integranular pore and feldspar dissolution diagenetic facies, feldspar dissolution and hydromica cementation-integranular pore facies, feldspar dissolution and chlorite cementation-integranular pore facies. The features of microscopic pore structures of various types of diagenetic phases were different. And the pore-throat ratio and coordination number with mercury injection saturation and mercury withdrawal efficiency had a good correspondence. That is, the smaller the pore-throat ratio was, the greater the coordination number was, and the greater the mercury injection saturation and mercury withdrawal efficiency were, such as the hydromica cementation-integranular pore and feldspar dissolution diage-netic facies; otherwise, the greater the pore-throat ratio was, the smaller the coordination number was, and the smaller the mercury injection saturation and mercury withdrawal efficiency were, such as the feldspar dissolution and chlorite cementation-integranular pore facies.关键词
华庆地区/延长组/长6储层/成岩相/微观孔隙结构/鄂尔多斯盆地Key words
Huaqing area/ Yanchang Formation/ Chang 6 reservoir/ diagenetic facies/ micro-pore structure/ Ordos Basin分类
能源科技引用本文复制引用
师调调,孙卫,张创,梁晓伟,何生平,任大忠,李春霞..鄂尔多斯盆地华庆地区延长组长6储层成岩相及微观孔隙结构[J].现代地质,2012,26(4):769-777,9.基金项目
国家科技支撑计划项目“低(超低)渗透油田高效增产改造和提高采收率技术与产业化示范”(2007BAB17B02) （超低）
国家油气重大专项项目(2011ZX05044). （2011ZX05044）
