摘要
目前,中国(除台湾省外)共发现储量大于或等于1000亿m^3以上的大、中型气田33个,为全国气层气探明总储量的72%。本文着重探讨了中国大、中型气田的主要控制因素:即发育于生气中心及其周缘;成气区内古隆起(构造);潜伏低、中阶煤系或其上、下与之关联的圈闭;大、中型气田成藏期晚;大面积孔隙性储层和良好的区域性盖层。根据这些控制因素对塔里木、准噶尔、吐哈、柴达木、鄂尔多斯、四川、莺歌海、琼东南和东海盆地进行了综合评价,并指出了寻找大中、型气田的有利区带。
Up till now, China (Taiwan province not included) has discovered 33 large and middle gas fields (each of them has a reserve of ≥10×10~9m^3). The total proved reserves of these fields count 72% of the national proved reserves. This paper chiefly discusses the main controlling factors of large and middle gas fields in China, i. e., they are: developed in gas generating center and /Or its surrounding areas; occurred in paleo-uplifts within the gas generating area, and in buried low, middle Coal series or related traps above or beneath them; of late reservoir-forming period possessing largearea porous reservoirs and good regional cap rock. Based on these controlling factors, this paper gives comprehensive evaluations for Tarim, Junggar, Turpan-Hami, Qaidam, Ordos, Sichuan, Yinggehai, Qiongdongnan and Donghai basins. It also points out the exploration plays for discovering large and middle gas fields.
关键词
中国
油气勘探
气田
勘探区
评价
China, petroleum exploration, large and middle gas field, exploration area, evaluation