现代地质2017，Vol.31Issue(3)：565-573,9.
鄂尔多斯盆地苏77、召51区块山23段储层成岩作用与孔隙演化定量分析
Diagenesis Characteristics and Quantitative Analysis of Porosity Evolution of Reservoir of Shan23 Formation in Su77-Zhao51 Well Region, Ordos Basin
摘要
Abstract
Taking advantage of the experiment of scanning electron microscopy,the casting thin section,high pressure Hg injection,X-ray diffraction and physical properties,this paper have studied the reservoir essential characteristics,including diagenesis types and intensity,porosity evolution of Shan23 Formation in Su77-Zhao51 well region in the Ordos Basin.The results show that there are mainly two rock types,i.e.quartz sandstone and lithic quartz sandstone,both of which have high compositional maturity and low structural maturity.In addition,the pore type is mainly dissolution pore,while the residual intergranular pore and intercrystalline pore take the second place.After undergoing moderate-strong degree compaction,moderate cementation and strong dissolution,the reservoir is now in the phase B of the middle diagenetic stage,part of which is in the late diagenetic stage.The compaction and cementation result in destroying primary pores,leading to the loss of porosity by 16.94％ and 14.29％,respectively.The intercrystalline pore and dissolution make porosity increase by 0.92％ and 5.64％ so that the reservoir property is improved.The pore space experienced a complex evolutionary process:reduction of primary pore→development of secondary pore→reduction of secondary pore →coexistence of mixture pore.关键词
苏77-召51区块/山23段/成岩作用/孔隙演化Key words
Su77-Zhao51 well region/Shan23 Formation/diagenesis/porosity evolution分类
天文与地球科学引用本文复制引用
王晓晨,罗静兰,李文厚,王若谷,唐启银..鄂尔多斯盆地苏77、召51区块山23段储层成岩作用与孔隙演化定量分析[J].现代地质,2017,31(3):565-573,9.基金项目
国家自然科学重点基金项目(41330315) （41330315）
中国地质调查局地质调查计划项目(12120114009201). （12120114009201）
