摘要
利用钻井、测井、地震、岩心及薄片等资料,研究四川盆地高石梯地区震旦系灯影组第四段岩溶期次。灯影组与麦地坪组、筇竹寺组之间均存在地层不整合,表明桐湾运动Ⅱ幕和Ⅲ幕导致灯影组第四段遭受了2次表生岩溶作用。钻井漏失和成像测井也指示研究区发育2期岩溶作用,出现2套岩溶洞穴层。结合岩溶期次及岩溶分带特征,垂向上可分为地表岩溶带、垂向渗流带、水平潜流带和深部缓流带。在2期表生岩溶作用的影响下,发育2个水平潜流带,其中上部的第一水平潜流带储层物性比下部第二水平潜流带更好,即桐湾运动Ⅲ幕对灯影组第四段上部储层的改造更加明显。
The karst period of time of the Member 4 of Sinian Dengying Formation in the Gaoshiti area of Sichuan Basin were studied through the analyses of drilling,logging,seismics,core and thin section observation.The existence of stratigraphic unconformity between Dengying Formation and Maidiping Formation and Qiongzhusi Formation indicates that the Tongwan MovementⅡand Tongwan MovementⅢcaused two times of epigenetic karstification on the Member 4 of Dengying Formation in the Gaoshiti area.Drilling loss and imaging logging also demonstrate that there are two times of karstification development in the study area accompanied by two sets of karst cave layers.Based on the karst period and the karst zoning characteristics in the study area,the paleo-karst in the Member 4 of Dengying Formation can be divided into four zones,including the surface seepage zone,the vertical seepage zone,the horizontal subsurface flow zone and the deep slow-flow zone.Under the influence of two-stage epigenetic karstification,two horizontal subsurface flow zones have developed in the Member 4 of Dengying Formation.The reservoir physical property of the upper first-level subsurface flow zone reservoir is better than that of the lower second horizontal subsurface flow zone.Therefore,the reformation of the Tongwan MovementⅢto the upper reservoir of the Member 4 of Dengying Formation is more obvious.
作者
刘文
沈秋媛
董树义
李弢
耿超
江林
蔡小红
宋荣彩
LIU Wen;SHEN Qiuyuan;DONG Shuyi;LI Tao;GENG Chao;JIANG Lin;CAI Xiaohong;SONG Rongcai(College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;Shunan Gas Refinery,PetroChina Southwest Oil and Gas Field Company,Luzhou 646002,China;Chengdu Longxing Nature Gas Co.,Ltd.of Southwest Oil&Gas Company,SINOPEC,Chengdu 610100,China)
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第5期575-585,共11页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国家科技重大专项(2017ZX05036003-007)
关键词
高石梯地区
灯影组
岩溶储层
岩溶期次
岩溶分带
Gaoshiti area
Dengying Formation
karst reservoir
karst period
karst zoning
