试论含气盆地综合分类及大气田分布  

A COMPREHENSIVE CLASSIFICATION OF GAS-BEARING BASINS AND DISTRIBUTION OF GIANT GAS FIELDS

作　　者：朱起煌[1] 

机构地区：[1]地质矿产部石油地质研究所，北京100083

出　　处：《中国海上油气（地质）》1997年第3期179-190,共12页China Offshore Oil and Gas(Geology)

基　　金：“八五”国家重点科技攻关项目85-102-01-08-06部分研究成果

摘　　要：按照天然气系统，天然气多源成因和多世代大地构造三重概念，对全球59个已发现大气田的盆地进行了综合分类，并在此基础上统计了不同盆地类型的大气田数量和储量分布，对比分析表明：（1）充分的源岩和有效的圈闭－保存条件是形成大气田的两个关键因素；（2）煤型气的大气田意义接近或超过了油型气；（3）中生代是寻找大气田的最佳盆地世代；（4）晚古生代的大气田以高储量比例为特征；（5）新生代发育了类型众多的含气盆地，所找到的大气田为数也不少，但规模偏小；（6）早古生代盆地因保存状态不佳，寻找大气田较困难；（7）我国含气盆地有不少世代属于大气田分布类型，虽然源岩条件较差，但找到一般规模的大气田似不成问题。Globally, 39 basins with at least one giant gasfield have been classified through a threefold concept (gas systems,multiple origins and tectonic generations) .resulting in a statistical distribu tion of giant fields and gas reserves for each type of basin generations. Based on detailed analyses, some observations could be concluded: (1) sufficient source rocks and efficient trap-preservation conditions are the two most important factors for formation of giant fields; (2)coal-type gas is e- qual of superior to oil-type gas in numbers and reserves of giant fields; (3)Mesozoic basin genera tions are optimal for searching for giant fields: (4)Late Paleozoic basin generations are character ized by higher reserves percent of giant fields; (5)a lot of giant fields have been discovered in many Cenozoic basin generations of different types,but they are generally smaller in size; (6)it is rela tively difficult to discover giant fields in Early Paleozoic basin generations owing to their poor preservation;(7)a number of generations of giant-field types widely developed in China gas-bear ing basins, where, though lack of excellent source rocks, giant fields with moderate size have proved in existence.

关 键 词：综合分类 含气盆地 含气系统 天然气成因 大地构造世代 大气田分布 

分 类 号：P618.13[天文地球—矿床学] TE12[天文地球—地质学]