中国大中型气田源盖能力配置类型及其与储量丰度关系

RELATIONS BETWEEN THE MATCH TYPES OF SOURCE ROCK-CAP ROCK AND RESERVE ABUNDANCES FOR LARGE AND MEDIUM GASFIELDS IN CHINA

鉴于中国31个大中型气田气藏源岩供气能力与盖层封气能力特征,对气藏源盖能力配置类型及其与储量丰度关系进行了研究。结果表明:中国31个大中型气田源岩以供气能力强为主,盖层以封气能力强为主;源盖能力配置类型等级有3种,以好源盖能力配置类型的大中型气田最多,较好和中等源盖能力配置类型的大中型气田较少;源盖配置类型等级与气藏储量丰度之间关系表明,中国31个大中型气田的主要源盖能力配置类型等级为中等。

In the light of the characteristics of gas supplying and sealing abilities of 31 large-medium gasfields and gas reservoirs, the match types between the two abilities stated above and relations between them and reserve abundances are studied. The achievements show that the source rocks of these fields and reservoirs are mainly characterized by strong supplying abilities and meanwhile the cap rocks are by strong sealing abilities; there are 3 kinds of match types between the two abilities for the source and cap rocks. It is a pleasure that most of gas fields possess much good match types, the rest has much better and favorite types; the relations between the match types and reserve abundances show that the favorite or medium match types of the two abilities have become the principal match types for 31 gasfields in China.