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国的深层天然气一般指的是聚集在埋深超过3500m地层中的天然气。从深层气的生成、储集、圈闭、保存条件等主要方面分析了深层天然气的成藏条件。中国深层天然气资源量为21.66×1012m占全国天然气总资源量的57%。其中陆上为17.11×1012m海域4.55×1012m陆上深层气资源主要集中在中西部地区，其中中部地区6.31×1012m西部地区8.14×1012m中国深层天然气勘探目标广阔，前景乐观，主要分布在松辽盆地、渤海湾盆地、鄂尔多斯盆地、四川盆地、塔里木盆地、吐哈盆地、柴达木盆地、南方地区及近海海域等10个地区的深部地层中，文中指明了勘探目标。深层天然气勘探应采用新技术和综合勘探方法才能提高勘探成功率并降低勘探成本。

THE EXPLORATION PROSPECT OF DEEPGAS IN CHINA

Deep gas in China usually refers to the naturalgas which has been accumulated and gathered in the formationwith buried depth of over 3 500 meters. The formation factors ofreservoirs are studied and analyzed from some major aspects likegenerating, accumulating and gathering, trapping and conserva-tion requirements of deep gas. In China, the deep gas resourceextent,57 per cent in the total, achieves in 21.66 trillion cubicmeters (21.66 × 1012m3) ,among which 17.11 trillion cubic me-ters was found on the continent,4.55 trillion cubic meters in thesea. The continent deep gas resource was discovered mainly inthe middle and west areas (6.31 × 1012m3 in the middle;8.14 ×1012m3 in the west). There is a wide area for exploring targets ofdeep gas in China, so the exploration has a bright future. The ex-ploring targets, described in details in this paper, distribute wide-ly in the deep formations of ten main districts such as SongliaoBasin, Bohaiwan Basin, Erduosi Basin, Sichuan Basin, TalimuBasin, Tuha Basin, Caidamu Basin, South area and some adjacentsea area, and so on. Only if new technique and multiple exploringmethods are to be applied in exploring deep gas, will the explo-ration success ratio be improved so as to reduce the explorationcost.