海相油气地质2025，Vol.30Issue(5)：527-536,10.DOI:10.3969/j.issn.1672-9854.2025.05.012
南海典型碳酸盐岩油气田解剖与勘探启示
Dissection and exploration enlightenment of typical carbonate oil and gas fields in the South China Sea
摘要
Abstract
There are relatively few summaries and comparative studies on the formation conditions,hydrocarbon accumulation models,and main controlling factors of carbonate oil and gas fields in the South China Sea(SCS),making it difficult to guide oil and gas exploration in similar areas of the SCS.Based on the tectonic background and basement control factors,the carbonate platforms in the SCS are classified into three types:stable,fault-block and inverted.Typical oil and gas fields in each type of platform are selected for dissection to analyze the characteristics of hydrocarbon source-reservoir-cap conditions,hydrocarbon accumulation patterns and main controlling factors.The research suggests that:(1)The source rocks of carbonate reservoirs in the SCS are mostly Oligocene-Miocene coal rocks and coal bearing mudstones form.The reservoirs are mostly composed of Middle-Upper Miocene biogenic reef limestone and calcarenites,with porosity mainly ranging from 20%to 25%,and permeability mainly at the range of(100-200)×10-3 μm2.The cap rock is Upper Miocene marine mudstone.(2)The three types of platforms exhibit distinct hydrocarbon accumulation models:stable platforms follow a"lower generation,lateral reservoir"model with long-distance migration;fault-block platforms adhere to a"lower generation,lateral reservoir"model with short-distance migration;inverted platforms exhibit a"lower generation,upper reservoir"model with short-distance migration.(3)The three types of carbonate platforms have different potential exploration areas:stable platforms focus on carbonate buildups developed above unconformities or sandstone bodies;fault-block platforms focus on the carbonate buildups on the horst adjacent to the fault depression.For reversed platforms,priority should be given to the carbonate buildups directly developed on the depression,which is also the most important exploration area for carbonate reservoirs in the SCS at present.关键词
碳酸盐台地/油气田解剖/主控因素/成藏模式/勘探启示/南海Key words
carbonate platforms/dissection of oil and gas fields/main controlling factors/hydrocarbon accumulation model/exploration enlightenment/South China Sea分类
石油、天然气工程引用本文复制引用
张强,范国章,王红平,王雪峰,杨志力,张远泽,田洪训,李丽..南海典型碳酸盐岩油气田解剖与勘探启示[J].海相油气地质,2025,30(5):527-536,10.基金项目
本文受"十五五"国家科技重大专项"南海远海构造沉积差异演化与有利凹陷及勘探方向优选"(编号:2025ZD1402705)和中国石油油气与新能源分公司项目"羌塘和中建南盆地及周缘油气成藏区划研究"(编号:2025YQCCQH18)联合资助 （编号:2025ZD1402705）
