大庆石油地质与开发2018，Vol.37Issue(3)：22-28,7.DOI:10.19597/J.ISSN.1000-3754.201803091
塔木察格盆地塔南凹陷铜钵庙组储层溶蚀作用特征及其影响因素
DISSOLUTION CHARACTERISTICS AND ITS INFLUENCING FACTORS OF TONGBOMIAO FORMATION RESERVOIR IN TANAN SAG OF TAMUTSAG BASIN
摘要
Abstract
Based on the microscopic characteristics analyses of the rock thin-sections,casting thin-sections and scanning electron photomicrographs,the dissolution characteristics of Tongbomiao-Formation reservoir and its influencing factors were systematically studied for Tanan Sag of Tamutsag Basin.The main reservoir rock types in the study area are volcanic clastic rocks followed by the clastic rocks.The tuffaceous sandstone (conglomerate) in the volcanic clastic rocks is the main reservoir rock type.The dissolution plays an obvious role in the reservoir reconstruction and is the most important diagenesis in the study area,which is mainly characterized by the dissolution of the feldspar,debris and volcanic material,which determines the pore type and pore vertical evolution to a certain extent in the area.The pore types are mainly secondary dissolved pores,including intergranular dissolved pores,intragranular dissolved pores,and volcanic ash dissolved pores etc.,the proportion of the primary pores is relatively lower,and 2 abnormal high-porosity zones are developed at 1 600-1 900 m and 2 300-2 900 m vertically.The factors that affect the developed degree and distribution of the dissolution also include the types of the rocks and sedimentary microfacies,besides the fracture and the acidic fluids formed by the thermal evolution of the organic matter in the diagenesis process and by the leaching of the local atmospheric water.关键词
塔木察格盆地/塔南凹陷/储层特征/溶蚀作用/孔隙演化/影响因素Key words
Tamutsag Basin/Tanan Sag/reservoir characteristic/dissolution/pore evolution/influencing factor分类
能源科技引用本文复制引用
李亚光..塔木察格盆地塔南凹陷铜钵庙组储层溶蚀作用特征及其影响因素[J].大庆石油地质与开发,2018,37(3):22-28,7.基金项目
国家重大科技专项“特低渗油藏有效开发技术”(2011ZX05013-006). （2011ZX05013-006）
