石油地质与工程2025，Vol.39Issue(6)：18-24,7.DOI:10.26976/j.cnki.sydz.202506004
鄂尔多斯盆地沙洼沟地区延9段储集砂岩物性特征及其控制因素
Physical characteristics and controlling factors of sandstone storage in Yan'an Formation in Shawagou area,Ordos Basin
摘要
Abstract
Physical property performance greatly affects the occurrence state and seepage characteristics of oil and gas in the storage sandstone,and is the key and foundation for studying the characteristics of the res-ervoir sandstone.In order to clarify the characteristics of the main control factors of Jurassic Yan 9 conven-tional sandstone reservoir in Shawagou area of Ordos Basin,based on the logging data and drilling core sam-ples,using the macro core observation,microscopic sheet and the microscopy experiment,and discusses the influence of deposition,diagenesis and pore structure and the influence of physical characteristics.The re-sults show that the physical property 0f Yan 9 sandstone storage in Shawagou area is good,and the average porosity and permeability is 15.4%and 47.4×10-3 μm2 respectively,which belongs to the medium pore and the low permeability oil storage sand layer.Sedimentary-diagenetic coupling is the internal cause of control-ling the differential distribution of reservoir sandstone,and pore structure is the external form of the differen-tial distribution.Weak compaction,weak metasomatism and weak filling(metasomatism)control a large number of intergranular holes,medium-strong dissolution leads to a large number of dissolution holes,the development of massive sedimentary structure is the best,and the samples with good pore structure have bet-ter physical properties.关键词
鄂尔多斯盆地/沙洼沟地区/延9段/储集砂岩/成岩作用/物性特征Key words
Ordos Basin/Shawagou area/Yan 9 area/reservoir sandstone/diagenesis/physical property分类
天文与地球科学引用本文复制引用
梁凤鸣,李爱荣,汪妍静,肖尊鹏,蒲洪果..鄂尔多斯盆地沙洼沟地区延9段储集砂岩物性特征及其控制因素[J].石油地质与工程,2025,39(6):18-24,7.基金项目
国家自然科学基金项目"鄂尔多斯盆地南部长6油层组地层水特征与油气富集规律研究"(41772140). （41772140）
