深层致密砂岩气储层成岩相测井识别及应用——以川西坳陷大邑须家河组须三段为例  

Diagenetic facies logging identification and application of deep tight sandstone gas reservoir:A case study of the third member of Xujiahe formation in Dayi area of western Sichuan depression

作　　者：黄莉莎 闫建平[1,2] 刘明洁[2] 张庄[3] 叶素娟[3] 张帆[4] 钟光海 王敏 王军 耿斌 HUANG Lisha;YAN Jianping;LIU Mingjie;ZHANG Zhuang;YE Sujuan;ZHANG Fan;ZHONG Guanghai;WANG Min;WANG Jun;GENG Bin(State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Exploration&Development Research Institute of Southwest Oil and Gas Company,SINOPEC,Chengdu,Sichuan 610500,China;Research Institute of Exploration and Development,PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;Research Institute of Shale gas,PetroChina Southwest Oil 8-Gasfield Company,Chengdu,Sichuan 610500,China;Institute of Exploration and Development,Shengli Oil Field,SINOPEC,Dongying,Shandong 257015,China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]西南石油大学地球科学与技术学院,四川成都610500 [3]中国石化西南油气分公司勘探开发研究院,四川成都610500 [4]中国石油新疆油田公司勘探开发研究院,新疆克拉玛依834000 [5]中国石油西南油气田公司页岩气研究院,四川成都610500 [6]中石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《中国矿业大学学报》2022年第1期107-123,共17页Journal of China University of Mining & Technology

基　　金：中国石油-西南石油大学创新联合体科技合作项目(2020CX020000);国家自然科学基金项目(41830431);中国石化科技部项目(P20061-3);高等学校学科创新引智计划(111计划)(D18016)。

摘　　要：为了精细识别致密砂岩成岩相类型并明确垂向和平面上有利成岩相的分布特征,以川西坳陷大邑地区须家河组须三段深层致密砂岩为例,利用薄片鉴定、物性测试与测井等资料,详细划分并分析不同成岩相类型的特征,确立优势成岩相.利用测井变量权重分析选取自然伽马、声波时差、中子、密度、深侧向电阻率5条成岩相测井响应敏感的曲线,构建了曲线重叠、曲线颜色成像模式和曲线交会图3种成岩相测井判识方法,进而开展单井成岩相识别、多井成岩相剖面对比以及成岩相平面分布特征研究,明确了溶蚀相在纵向上的发育位置和平面上的优势发育区域.研究结果表明:鉴于测井曲线分辨能力和不降低储层分析效果的原则,深层致密砂岩成岩相可划分为中强压实弱胶结溶蚀相、中强压实中强胶结溶蚀相、弱压实中强胶结溶蚀相、弱压实中强胶结相、中强压实弱胶结相和中强压实中强胶结相6大类;优质储层以中强压实弱胶结溶蚀相为主,孔隙度一般大于4%,具有骨架颗粒为中细粒、次生溶蚀孔隙相对发育的典型特征;综合应用上述3种成岩相判识方法可有效识别井筒剖面成岩相类型;多井成岩相剖面对比及平面分布显示,大邑地区须家河组须三段致密砂岩溶蚀相纵向上主要发育在中亚段,溶蚀相占砂岩厚度比超过30%,平面上溶蚀相占比较大的区域主要分布在龙门山前"条形"构造带,"溶砂比"超过40%,局部上看新场构造溶蚀相也相对发育,整体从北西至南东方向溶蚀相发育逐渐变弱,这为深层致密砂岩储层有效性分析、甜点预测及井位部署提供了依据.To accurately identify the types of diagenetic facies of tight sandstone and clarify the distribution characteristics of favorable diagenetic facies in vertical and plane,thin section,physical property experiments and well logging were performed in the deep tight sandstone samples of the third member of Xujiahe formation in Dayi area of western Sichuan depression.After the analysis,the characteristics of different diagenetic facies types were divided and analyzed in detail,and the favorable diagenetic facies were also identified.Using the weight analysis of logging variables,five sensitive logging curves,namely natural gamma ray(GR),acoustic log(AC),compensated neutron log(CNL),formation density(DEN)and deep lateral resistivity(Rd),were selected to establish three diagenetic facies logging identification method including logging curve overlapping,logging curve color imaging mode and logging cross plots.Then single well diagenetic facies identification,multi-well diagenetic facies profile comparison and plane distribution characteristics of diagenetic facies were discussed.Finally,the development position of the dissolution phase in the longitudinal direction and the dominant development area in the plane are defined.The results indicate that the diagenetic facies of deep tight sandstone can be divided into six categories namely medium-strong compaction weak cementation dissolution facies,medium-strong compaction medium-strong cementation dissolution facies,weak compaction medium-strong cementation dissolution facies,weak compaction medium-strong cementation facies,medium-strong compaction weak cementation facies and medium-strong compaction medium-strong cementation facies considering the resolution of logging curves and the principle of not reducing reservoir analysis effect.The high-quality reservoir is dominated by medium-strong compaction weak cementation dissolution facies.And the porosity is generally greater than 4%,which has the typical characteristics of medium and fine-grained skeleton particles and rel

关 键 词：致密砂岩 成岩相 须家河组 曲线重叠法 曲线成像法 测井交会图 

分 类 号：TE121.3[石油与天然气工程—油气勘探]