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.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
1993年第4期331-339,共9页
Oil & Gas Geology
