中扬子地区海相碳酸盐岩石油地质特征及远景评价  

PETROLEUM GEOLOGICAL CHARACTERISTICS AND PROSPECTS ASSESSMENT OF MARINE CARBONATE ROCKS IN MIDDLE YANGZI RIVER REGION

作　　者：胡明毅[1] 戴卿林[1] 朱忠德[1] 严金泉[2] 

机构地区：[1]江汉石油学院地质系,湖北江陵434102 [2]江汉石油管理局勘探开发研究院,湖北潜江433124

出　　处：《石油与天然气地质》1993年第4期331-339,共9页Oil & Gas Geology

摘　　要：中扬子地区经历了基底形成、地台发育、后地台改造三个演化阶段。该区上震旦统至中三叠统以海相碳酸盐岩沉积为主,厚达6000—10000m。海相沉积生油层系多、厚度大,母质类型以Ⅰ型干酪根为主,处于成热—高熟阶段;具备多种储集空间和良好的生储盖组合条件。以石柱复向斜、当阳复向斜和沉湖复向斜含油气远景最好。Middle Yangzi River Region,located in the middle part of Yangzi paraplatform,un-derwent three sedimentary evolution and development stages:basement formation stage;platform development stage and post-platform reformation stage.Sediments from UpperSinian to Middle Triassic are mainly marine carbonate rocks of six to ten km thick.Thesediments,with multiple source sequences,thick source rocks,type-Ⅰ kerogen as the majorparent material,matured or high-matured organic matter,possess good hydrocarbon gen-erating condition.The reservoirs,including mainly porous dolomite reservoir,paleo-weathered crust reservoir,shallow-beach reservoir and fracture-solution pore reservoir,are variety in types and great in thickness.The cap rocks are wide spread in the studyarea.It is suggested that the area has fine source-ressrvoir-cap rock assemblage,andfavourable conditions to form commercial oil and gas fields.According to the preservation condition,the study area can be divided into threetypes:1.Shizhu-Wanxian tectonic stable area;2.paulopost fault-subsided area in Jiang-han Plain and 3.folded-uplift area in West Hunan-West Hubei region.Among them,theShizhu synclinoriun in Chuandong is most favourable for gas exploration,Dangyang andChenhu synclinoria located in hinterland of Jianghan Plain have best oil prospects.

关 键 词：含油 海相 碳酸盐油气田 地质勘探 

分 类 号：P618.130.2[天文地球—矿床学]