雪峰山西侧地区震旦系灯影组碳酸盐岩储集特征及分布  

Reservoir characteristics and distribution characteristics of the carbonate in Dengying Formation on the western side of the Xuefeng Mountain

作　　者：李旭兵[1] 刘安[1] 危凯[1] 赵灿[1] 

机构地区：[1]中国地质调查局武汉地质调查中心,湖北武汉430205

出　　处：《地质通报》2012年第11期1872-1877,共6页Geological Bulletin of China

基　　金：中国地质调查局项目<桑植-石门及邻区油气地质综合调查及地层对比研究>(编号:12120112 20745)和<雪峰山西侧黔江走廊大剖面油气地质调查及地层研究>(编号:1212010782005)

摘　　要：在对雪峰山西侧地区震旦系灯影组海相地层剖面测量、路线调查及钻井资料分析的基础上,结合灯影组储集岩物性分析数据,阐述了震旦系灯影组的储集岩岩石类型、储集空间、储集性能、储集岩的分布特征及其与沉积环境的关系。认为震旦系灯影组碳酸盐岩储集岩类型主要为鲕粒滩型与白云岩型2类。储集空间类型为溶蚀孔隙、晶间孔隙和裂缝,孔隙连通性较好。灯影组储集层主要分布于慈利-保靖断裂以北的潮坪相区和台缘相区;湖北秭归一带灯影组一段的高能浅滩相鲕粒、砂砾屑白云岩物性最好,孔隙度最大值为11.00%,平均值为8.26%,渗透率最大值为7.72×10-3μm2,平均值为3.66×10-3μm2,属于Ⅱ型储集层。灯影组白云岩储层在中扬子地区多深埋地腹,盖层及保存条件相对较好,是一套分布广泛的储集岩。深入研究震旦系储层对南方海相油气勘探有重要的意义。Based on section measurement, field investigation and physical property data of the carbonate reservoirs in Dengying Formarion on the western side of the Xuefeng Mountain, this paper deals in detail with the rock types,space types, quality, and distribution characteristics of the reservoirs and the relationship between the depositional environment and the reservoir quality. There exist two principal types of reservoirs in the Dengying Formation： the oolitic beach sediments and the dolomite. Solution cavities, intercrys- tal pores and fi：actures with good connectivity constitute the main reservoir space. The reservoirs of tidal flat facies and platform edge facies north of Baojing-Cili fault seem to be the most favorable carbonate exploration zone. Oolitic dolostone and dolorudite of the first member of Dengying Formation around Zigui area constitute the best reservoirs in the study area, with maximal porosity 11.00%, （8.27% on average） and maximal permeability 7.72 ×10^-3μm2 （3.66×10^-3μm2 on average）. Dengying Formation dolostone constitutes important reservoirs widely distributed on the western side of the Xuefeng Mountains, which were deeply buried in the middle Yangtze region with good cap and preservation conditions. Further research on Dengying Formation reservoirs will be of great significance for gas exploration in southern China.

关 键 词：碳酸盐岩 储集岩 震旦系 灯影组 雪峰山西侧 

分 类 号：P534.31[天文地球—古生物学与地层学] P588.245[天文地球—地质学]