西北地质2024，Vol.57Issue(6)：186-198,13.DOI:10.12401/j.nwg.2024082
鄂尔多斯盆地神木气田石千峰组千5段砂体发育规模与储层特征
Development Scale and Reservoir Characteristics of Sand Bodies in the Qian 5 Member of the Shiqianfeng Formation of the Shenmu Gas Field in the Ordos Basin
摘要
Abstract
The Shiqianfeng Formation,as the top natural gas reservoir in the Permian of the Ordos Basin,has the characteristics of large sandstone thickness and wide distribution.Based on the analysis of outcrop,drilling and logging data,and core sedimentary facies,the outcrop measurement method,empirical formula method,and dense well network dissection method were used to evaluate the development scale of sand bodies in the Qian5 member.Combining microscopic thin sections,scanning electron microscopy,mercury intrusion,nuclear mag-netic resonance,and other analytical methods,the study and classification evaluation of reservoir characteristics in the Qian5 member are conducted,providing clues for subsequent high-precision development.Research sug-gests that the Qian5 section of the Shenmu area is a braided river delta plain deposit,mainly composed of braid-ed distributary channels and flood plain subfacies,with locally developed flood crossing sand deposits.During the sedimentation period,the average depth of braided river channels is 5-6 m,with a width of 800-1 200 m in the upper section of Qian5 and a width of 1 200-1 600 m in the lower section of Qian5.Thick layers of lithic sandstone,feldspathic lithic sandstone,and lithic feldspathic sandstone reservoirs were formed,characterized by high rock debris content and high intergranular pore content.It is manifested as four types of sandstone reser-voirs:type I,micron level fracture pore type;Class II micron-nano interconnected pore type;Class III nano-mi-cron level connected to isolated pore type;Class IV nanoscale isolated pore type.The local enrichment of lau-montite in the sandstone of Qian5 member has created potential material conditions for searching for reservoirs with high porosity and permeability.关键词
鄂尔多斯盆地/石千峰组/沉积相/储层/神木气田Key words
Ordos basin/Shiqianfeng Formation/sedimentary facies/researvoir/Shenmu oilfield分类
天文与地球科学引用本文复制引用
黄有根,王晔,路归一,陈存良,吴和源,张芳,冯炎松..鄂尔多斯盆地神木气田石千峰组千5段砂体发育规模与储层特征[J].西北地质,2024,57(6):186-198,13.基金项目
中国石油科技重大专项"复杂碳酸盐岩气藏效益上产与提高采收率技术研究"(2023ZZ16-03)资助. （2023ZZ16-03）
