川东—川中地区茅口组白云岩成因初探及“热次盆”概念的提出  

DISTRIBUTION AND ORIGIN OF DOLOMITES IN MAOKOU FORMATION,EASTERN AND CENTRAL SICHUAN BASIN

作　　者：李毅[1] 沈浩[1] 石学文[1] 汪华[1] 陈莎[1] 袁小玲[1] 

机构地区：[1]中国石油西南油气田公司勘探开发研究院

出　　处：《天然气勘探与开发》2013年第4期1-3,29,共4页Natural Gas Exploration and Development

摘　　要：在对川东—川中地区钻达下二叠统的近千口井钻井资料的研究过程中,发现部分井在茅口组有厚层白云岩存在,并集中分布于茅口组二段a小段。通过针对性的野外地质调查工作,于华蓥山地区二崖、西天等地找到了此套白云岩并首次建立了野外剖面。分析认为属热水白云岩,是良好的油气储层。After a study on drilling data from nearly 1000 wells drilled to lower Permian,eastern and central Sichuan Basin,it is illustrated that for some wells,thick-bedded dolomites can be seen in the Maokou Formation(P_1m),almost distributing in P_1 m^1a.Based on field survey,the dolomites were found in both Erya and Xitian areas,Huaying Mountain.And their field profiles were also established for the first time.It is deemed that the dolomites not only belong to hydrothermal one but also are better oil/gas reservoir.

关 键 词：二叠系 茅口组 白云岩 热水沉积 热次盆 

分 类 号：P618.13[天文地球—矿床学]