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崖１３－１气田是近年来在我国南海琼东南盆地发现的大气田，剖析其成藏地质条件对今后找气具借鉴意义。研究表明，该气田的形成主要具以下地质条件：①具优越的盆地背景，气田所处的琼东南盆地和紧邻的莺歌海盆地第三系沉巨厚，有多套烃源岩，为大气田提供了雄厚的物质基础；②莺－琼盆地新生界具有高温、高压和快速没降特征，地史中经历了断陷－拗陷三个发展阶段，这类“三段式”、晚期高温、快速沉降的热盆，极有利于天然气的生成

THE CHARACTERISTICS OF NANHAI YA 13-1 GAS FIELD AND ITS ENRICHMENT POOL-FORMED CONDITIONS

??Ya 13-1 gas field, a big one found out in Qiongdongnan Basin of China south sea in recent years,is of the following geological conditions:??The Tertiary deposition in Qiongdongnan Basin and Yinggehai Basin being close to the gas field has a great thickness and several sets of source rocks.which provides a rich matterial foundation for forming the gas field; ??The Cenozoic group in Yins-Qiong Basins has the characteristics of high-temperature.high-pressure and high-speed subsidence.the three development stages of fault-fall-fault-sag-depression are through geologic history and this kind of thermal basin is favourable for the growth and enrichment of natural gas; ??The gas field is close to source sag, has a favourable reservoir-caprock combination and is in structural belt's high position,which is good for heavy catching gas;??The gas field has favourable confining condition; ??The trap of this gas field is a composite one combining structures with lithology and strata.