摘要
为明确川北地区中二叠统茅二段碳酸盐岩储层发育机制及控制因素,文中选取典型井及剖面,利用薄片鉴定、阴极发光、扫描电镜、物性分析、高压压汞等手段,对茅二段储层特征及控制因素进行了分析。结果表明:1)茅二段为碳酸盐岩台地沉积,孔渗条件较差,依赖裂缝及成岩作用改造;2)茅口组储层成岩作用复杂,发生多期次溶蚀及白云岩化作用;3)储层受构造活动、沉积及成岩作用等多种因素共同控制。构造演化及古地貌影响了沉积及成岩作用范围,茅口组发育的滩体是储层形成的物质基础,后期岩溶改造叠加白云岩化是储层形成的关键。
In order to clarify the development mechanism and controlling factors of the second Member carbonate reservoir of the Middle Permian Maokou Formation in northern Sichuan region,the reservoir characteristics and controlling factor of second Member of the Maokou Formation were studied by the means of drilling and profile data,sheet identification,cathodoluminescence,scanning electron microscopy,physical property analysis,and high-pressure mercury injection.The results show that:(1)the second Member of the Maokou Formation is carbonate platform deposition with worse porosity and permeability conditions,which rely on the transformation of fracture and diagenesis;(2)the reservoir of Maokou Formation has complex diagenetic action and is subject to multi-stage dissolution and dolomitisation;(3)the reservoir is controlled by multiple factors such as structure activity,sedimentation and diagenesis.The tectonic evolution and paleogeomorphology affect the sedimentary and diagenetic range,the mudflats developed in the Maokou Formation are the material basis for reservoir formation,and the late karst transformation superimposed dolomitization is the key to reservoir formation.
作者
刘宣威
田亚铭
张慧
李翔
罗启超
黄正
LIU Xuanwei;TIAN Yaming;ZHANG Hui;LI Xiang;LUO Qichao;HUANG Zheng(School of Earth Sciences,China University of Petroleum,Beijing 102249,China;Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation of Ministry of Natural Resource,Chengdu University of Technology,Chengdu 610059,China;Gas Storage Company,PetroChina,Beijing 102206,China;Jiangsu Drilling Company,East China Petroleum Engineering Co.,Ltd.,SINOPEC,Yangzhou 224261,China)
出处
《断块油气田》
CAS
CSCD
北大核心
2022年第4期463-468,共6页
Fault-Block Oil & Gas Field
基金
中国石油化工股份有限公司勘探分公司项目“元坝及邻区茅二段特殊异常地质体属性研究”(35450003-19-ZC0607-0006)
“元坝地区茅口-吴家坪组沉积储层及有利目标研究”(35450003-20-ZC0607-0009)。
关键词
溶蚀作用
储层演化
有利区预测
茅口组
川北地区
dissolution
reservoir evolution
favorable area prediction
Maokou Formation
northern Sichuan region
