鄂尔多斯盆地子洲气田上古生界山西组、下石盒子组储集层特征对比研究  

Study on the characteristics of the Upper Paleozoic Shanxi and Xiashihezi Formation in Zizhou gas field,Ordos Basin

作　　者：王若谷 李文厚[2] 廖友运[3] 冯永玖[4] 郭艳琴[5] 马瑶[2] 许星 

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,西安710069 [2]西北大学地质学系,大陆动力学国家重点实验室,西安710069 [3]中国煤炭地质总局航测遥感局遥感应用研究院,西安710054 [4]中国石油长庆油田分公司勘探开发研究院,西安710021 [5]西安石油大学油气资源学院,西安710065 [6]中国石油长庆油田采气二厂,陕西榆林719000

出　　处：《地质科学》2015年第1期249-261,共13页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金项目(编号:40902042);国家科技重大专项(编号:2011ZX05005-004-008HZ);陕西省教育厅自然科学专项科研计划项目(编号:11JK0746)资助

摘　　要：鄂尔多斯盆地子洲气田山西组山23段和下石盒子组金8段是该区天然气的主力储集层,但其产能却存在很大差异.应用薄片鉴定、扫描电镜、高压压汞、恒速压汞及岩心分析资料,分别对该地区上古生界山西组山23段和下石盒子组盒8段储集层进行了研究.子洲气田山23储层以石英砂岩为主,孔隙类型多样,粒间孔、溶孔、晶间孔发育,喉道类别以微—细喉为主,属相对低孔高渗型储层;盒8储层则以岩屑砂岩为主,孔隙类型主要为岩屑溶孔和晶间孔,喉道类别以细—微喉为主,属于相对低孔低渗型储层.山23段和盒8段储集层岩石类型、孔隙结构差别巨大,造成了其储集性能的差异性.不同的沉积环境和成岩作用是造成其差异性的主要原因.The Shan 23 layer of Shanxi Formation and He 8 layer of Lower Shihezi Formation are the dominant reservoirs of Zizhou gas field in Ordos Basin.However,there exists a remarkable productivity lag between the two reservoirs.By means of microscope,SEM,high-pressure mercury penetration,constant-speed mercury penetration and core analysis,the Shan 23 and He 8 reservoirs have been carefully studied in this paper.The results showed that the Shan 23 reservoir was mainly quartz sandstone with multiply types of pores,such as inter-granular pores,dissolving pores and inter-crystal pores,and throat family is dominated by micro-fine throat.Shan 23 reservoir could be characterized as low porosity and relatively high permeable reservoir.The He 8 reservoir was lithic sandstone with the dominant pore types of lithicdissolving pores and inter-crystal pores,and throat family is dominated by fine-micro throat.He 8 reservoir could be identified as low porosity and relatively low permeable reservoir.The enormous differences between rock types and pore structures of Shan 23 and He 8 reservoirs led to the differential reservoir property.Distinct depositional environments and diagenesis were the major courses of their differences.

关 键 词：子洲气田 山23段 盒8段 储层特征 孔隙类型 恒速压汞 沉积作用 成岩作用 

分 类 号：P618.13[天文地球—矿床学] TE122.2[天文地球—地质学]