四川盆地碳酸盐岩发育区主要烃源岩分布及有机质演化研究──烃源体系与大中型气田的形成及预测  

RESEARCH ON MAIN HYDROCARBON SOURCE ROCK DISTRIBUTION AND ORGANIC EVOLUTION OF CARBONATE ROCK DEVELOPED AREAS IN SICHUAN BASIN

作　　者：黄籍中[1] 陈盛吉[1] 宋家荣[1] 王兰生[1] 苟学敏 王廷栋[1] 戴鸿鸣[1] 

机构地区：[1]西南石油学院

出　　处：《天然气工业》1996年第S1期68-78,108-109,共13页Natural Gas Industry

摘　　要：文章以“源控论”为主导，烃源体系为对象，大中型气田为目标展开论证。确证四川盆地下寒武统、下志留统、下二叠统是油系烃源层，上二叠统、上三叠统是煤系烃源层，为大中型气田形成提供了丰富的烃源，制约、组建了上震旦统－上三叠统的多组烃源体系。以烃潜量强度值为基础，结合区域古构造发展，建立了异源型、自源型和混源型等三类烃源体系模式，并以此作大中型气田形成的有利区块预测。建议在加强川东下志留统－二叠系；乐山－龙女寺加里东古隆起核部及其周边上震旦统－下寒武统；川中下志留统－中三叠统；川西上三叠统等烃源体系勘探的同时，还应重视以侏罗系、白垩系碎屑岩为储层所组建的新烃源体系的研究与勘探，如川西坳陷中心地带、川北－川东联结部位的盆地北缘地带、川西南－川南区块现今白垩系保存地带等地区，可望在这新的领域内有所突破。The demonstration is carried out by taking 'Source Control Theory' asdominant hydrocarbon source system as research object and large-medium gas field as target,it is affirmed that in Sichuan Basin Lower Cambrian,Lower Silurian and Lower Permian arethe hydrocarbon source beds of oil system and Upper Permian, Upper Triassic are the hydrocarbon source beds of coal system which provide rich hydrocarbon source for the formation oflarge-medium gas fields,restrict and constitute multi-hydrocarbon source system of UpperSinian-Upper Tricssic. Based on hydrocarbon potential intensity value and combined with regional palaeostructural evolution, the hydrocarbon source system modes of foreign-sourcepattern, self-source pattern and mixed-source pattern are set up, which can be used for predicating the favourable blocks of forming large-medium gas fields. It is suggested that besidesstrenthening hydrocarbon source system exploration of Lower Silurian-Permian in EastSichuan,Upper Sinian-Lower Cambrian in the central part and around the circumference ofLeshan-longnusi Caledoian paleaohigh, Lower Silurian-Middle Triassic in Central Sichuanand Upper Triassic in West Sichuan,an attention should be paid to the research and exploration for now hydrocarbon source systems constituted by the reservoirs of Jurassic systemand Cretaceous system classtic rocke,such as the central zone of West Sichuan depression,the basin north edge of North Sichuan-East Sichuan joint part, nowaday Cretaceous distribution zone in Westsouth Sichuan-South Sichuan blob etc. It is possible that some largemedium gas fields will be found in these new trerritories.

关 键 词：四川盆地 源岩 地球化学特征 烃类演化 油气田 模式 预测 

分 类 号：TE122.115[石油与天然气工程—油气勘探]