石油勘探与开发2026，Vol.53Issue(1)：39-51,13.DOI:10.11698/PED.20240785
南海北部大陆边缘天然气总区带系统
Total play system of natural gas in northern continental margin of the South China Sea
摘要
Abstract
For the next exploration direction and integrated evaluation and optimization of targets for the northern continental margin of the South China Sea,this paper proposes the concept of the"total natural gas play system"based on the principles of systems theory.Integrating over 60 years of exploration achievements in the four major basins,the paper studies the basic geological conditions,hydrocarbon accumulation models and distribution characteristics of the system.With the core principle of"source-heat controlling natural gas and play-stratigraphy controlling accumulation",it analyzes the distribution law of natural gas reservoirs covering"intra-sag,sag margin,extra-sag"and multi-stratigraphic sequences.The study shows that under the joint control of source and heat,the northern continental margin of the South China Sea can be divided into two major gas areas:the southern area dominated by coal-type gas and the northern area dominated by oil-type gas,with the former as the main body.Based on the distribution location of gas kitchens,the total gas plays are classified into three types:intra-sag,sag margin and extra-sag.In the oil-type gas area of the northern coastal zone,the proportion of intra-sag natural gas is relatively high;in the coal-type gas area of the southern offshore zone,the proportions of intra-sag and sag margin natural gas are relatively large;while the scale of gas accumulation in the extra-sag plays is relatively small.Finally,it is clearly pointed out that the southern offshore zone is the main direction for the next natural gas exploration in the northern South China Sea.Specifically,in the offshore zone,the intra-sag play and middle-deep layers of the sag margin play in the Yingzhong Sag should be focused for the Yinggehai Basin;the intra-sag play and sag margin play in the central depression are targets for the Qiongdongnan Basin;the middle-deep layers of the intra-sag play are targets for the Baiyun Sag of the Pearl River Mouth Basin.Furthermore,in the northern depression zone of the Pearl River Mouth Basin within the coastal zone,the main exploration directions include the middle-deep layers of the intra-sag play in the Huizhou Sag and the middle-deep layers of the intra-sag play in the Enping Sag;in the Beibu Gulf Basin,the main directions are the middle-deep layers of the intra-sag play in the Weixinan Sag and the middle-deep layers of the intra-sag play in the Haizhong Sag.关键词
煤型气/油型气/天然气总区带/勘探方向/莺歌海盆地/琼东南盆地/珠江口盆地/北部湾盆地/南海Key words
coal-type gas/oil-type gas/total play system of natural gas/exploration target/Yinggehai Basin/Qiongdongnan Basin/Pearl River Mouth Basin/Beibu Gulf Basin/South China Sea分类
能源科技引用本文复制引用
张功成,李安琪,郝建荣,王柯,郭佳,陈莹,洪思婕,封从军,廖晋,纪沫,刘世翔,王攀荣,胡高伟..南海北部大陆边缘天然气总区带系统[J].石油勘探与开发,2026,53(1):39-51,13.基金项目
国家基金委企业创新发展联合基金项目"南海北部深水区深层温压场差异性演化对优质储层的控制机理"(U24B2016) （U24B2016）
国家科技重大专项"南海油气成藏机制与勘探开发关键技术"(2025ZD1402700) （2025ZD1402700）
