川中地区下寒武统龙王庙组优质储层形成机理  

Formation mechanism of high quality Longwangmiao reservoir from central Sichuan basin

作　　者：田艳红[1] 刘树根[1] 赵异华 孙玮[1] 宋林珂 宋金民[1] 梁锋 尹柯惟 李俊良 王晨霞[1] 吴娟[1] 龙翼[1] 李泽奇 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,成都610059 [2]中国石油西南油气田公司川中油气矿,四川遂宁629001

出　　处：《桂林理工大学学报》2015年第2期217-226,共10页Journal of Guilin University of Technology

基　　金：国家重点基础研究发展计划"973"项目(2012CB214805);国家科技重大专项(2011ZX05005-003)

摘　　要：为揭示龙王庙组优质储层的形成机理,以钻井、测录井、地震、测试资料、岩心观察、薄片鉴定、阴极发光分析、地球化学分析等为基础,对川中地区高石梯-磨溪构造寒武系下统龙王庙组储层颗粒滩特征与后期成岩改造作用进行了研究。结果表明,龙王庙组颗粒滩沉积相是优质储层形成的重要物质基础,(准)同生期海水白云石化和淡水溶蚀作用是早期优质储层形成的关键所在,表生岩溶作用和烃类(有机酸)充注作用是晚期龙王庙组优质储层改造的重要建设性和保持性成岩作用,多期岩溶作用叠加形成了龙王庙组溶孔洞型储层,并在晚期超压气藏中保存良好。Analysis covers the formation and reconstruction of Lower Cambrian Longwangmiao Formation reser-voirs in Gaoshiti -Moxi structure of central Sichuan basin,esp.the formation mechanism of the high quality Longwangmiao reservoir.According to the drilling data,logging data,testing data,seismic data,core observa-tion,thin sections,casting sections,geochemical analysis,the characteristics of grain beach and epigenetic di-agenesis of Longwangmiao reservoir are studyied.The results show that grain beach is important for the formation of the high quality Longwangmiao reservoir.Seawater dolomitization and penecontemporaneous fresh-water dis-solution are the key to early formation.Epigenic karstification and hydrocarbon (oganic acids)filling are the important construction diagenesis and retention diagenesis to late formation.The dissolution pore-hole reservoirs are well preserved in the overpressure system.This study is important to exploration and development of oil and gas.

关 键 词：优质储层 形成机理 龙王庙组 川中地区 

分 类 号：P618.130.21[天文地球—矿床学]