川西新场地区须二段致密砂岩气藏气水分布特征及主控因素  

Gas-water distribution characteristics and main controlling factors of tight sandstone gas reservoir in the second Member of Xujiahe Formation in Xinchang area,western Sichuan

作　　者：赵俊威 陈恭洋 赵星[3] 杨映涛[4] 张玲[4] 印森林 聂昕[5] 王恒 ZHAO Junwei;CHEN Gongyang;ZHAO Xing;YANG Yingtao;ZHANG Ling;YIN Senlin;NIE Xin;WANG Heng(Key Laboratory of Oil and Gas Resources and Exploration Technology of Ministry of Education,Yangtzeu University,Wuhan 430100,China;Mud Logging Technology and Engineering Research Institute,Yangtzeu University,Jingzhou 434020,China;Exploration and Development Research Institute,PetroChina,Beijing 100089,China;Exploration and Development Research Institute,Southwest Oil and Gas Field Company,SINOPEC,Chengdu 610000,China;Geophysics and Petroleum Resources College,Yangtzeu University,Wuhan 430100,China)

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北武汉430100 [2]长江大学录井技术与工程研究院,湖北荆州434020 [3]中国石油勘探开发研究院,北京100089 [4]中国石化西南油气分公司勘探开发研究院,四川成都610000 [5]长江大学地球物理与石油资源学院,湖北武汉430100

出　　处：《断块油气田》2024年第3期379-386,共8页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目“海相浪控砂质临滨坝沉积构型差异性及沉积动力学机制研究”(41902155);“冲积扇储层孔隙结构复杂模态成因机制及其分布模式”(41502126)。

摘　　要：致密砂岩气藏气水关系复杂,为了阐明川西新场地区须二段气水分布主控因素,以试产数据、压汞曲线、岩石薄片分析为手段,探讨了地层水宏观特征,明确了新场地区须二段气水分布主控因素。结果表明:新场地区须二段储层较致密,孔喉连通性差,致密化储层使气水分布复杂,须二段气藏总体呈上气下水特征,但气水倒置现象较多;研究区气水分布受控于构造演化、砂泥岩相配置关系、河道间叠置方式及单砂体内部成岩差异,多期构造演化过程控制了气水分布的宏观尺度格局,不同类型的河道叠置及砂泥配置关系影响砂体尺度的气水分布,厚层-薄层垂向分离型叠置关系及砂泥互层型配置关系有利于形成气层,单砂体内部成岩差异影响单砂体内部尺度气水分布。对研究区气水分布主控因素的研究结果,可有效指导新场地区须二段气藏的勘探开发。The gas-water relationship of tight sandstone gas reservoir is complex.In order to clarify the main controlling factors of gas-water distribution in the second Member of Xujiahe Formation in Xinchang area,western Sichuan,the macroscopic characteristics of formation water was explored by means of test production data,mercury pressure curve and rock thin section analysis,and the main controlling factors of gas-water distribution in this area was clarified.The results show that the reservoir in Xu 2 Member of Xinchang area is tight,with poor pore throat connectivity,and the gas-water distribution is complicated by the tight reservoir.The Xu 2 Member gas reservoir is generally characterized by upper gas and lower water,but the phenomenon of gas-water inversion is common.The gas and water distribution in the study area is controlled by structural evolution,the configuration relationship of sandstone and mudstone facies,the superposition pattern of river channels and the diagenetic differences within single sand bodies.The multi-stage structural evolution process controls the macroscopic scale pattern of gas-water distribution,the superposition of different types of river channels and the configuration of sand and mud affect the gas water distribution at the sand body scale.The vertically-separated type superposition relationship between thick layers and thin layers and the interbedded configuration relationship between sand and mud layers are conducive to the formation of gas layers.The diagenetic differences within a single sand body affect the gas-water distribution at the single sand body internal scale.The research results on the main controlling factors of gas and water in the research area can effectively guide the exploration and development of Xu 2 Member gas reservoir in Xinchang area.

关 键 词：致密砂岩气 气水分布 须家河组 新场地区 川西坳陷 

分 类 号：TE122[石油与天然气工程—油气勘探]