南海大中型油气田成藏特征与控制因素  

Reservoir characteristics and controls of huge oil fields in the South China Sea

作　　者：吴敬武 张强[1,2] 吴时国[3] 吕福亮 王彬 贺晓苏 毛超林 

机构地区：[1]中国石油杭州地质研究院,杭州310023 [2]中国石油天然气集团碳酸盐岩储层重点实验室,杭州310023 [3]中国科学院海洋研究所中国科学院海洋地质与环境重点实验室,青岛266071

出　　处：《地球物理学进展》2013年第6期3106-3116,共11页Progress in Geophysics

基　　金：国家重大专项"西沙海域油气地质综合研究及有利勘探区"(2011ZX05025-004);国家基金南海重大计划重点项目"南海北部淹没碳酸盐台地发育演化及混合沉积研究"(91228208)联合资助

摘　　要：通过对南海6个典型大中型油气田的解剖,总结了南海大中型油气田的成藏特征:大中型油气田均分布于中-上中新统区域盖层之下,位于持续沉降的富生烃凹陷的"凹中隆",含油气层位主要为南海区域不整合面附近和中中新统;大中型油田的形成是南海构造演化及诸多地质因素综合作用下,形成完好的生储盖及运圈保条件,如富生烃凹陷、断拗转换面不整合及砂体储集体、中新世生物礁和广泛分布的半深海泥岩盖层;南海的有利勘探目标包括区域性不整合面上下砂体、凹中隆、近源砂体和新近系及第四系生物礁滩体.By analysing 6 large and middle size oil fields in the South China Sea （SCS）, the reservoir characteristics and controls have been discussed in this paper. The huge oil fields are distributed in strata below Middle and Upper Miocene seal rocks. They all located at uplifts in the depression which was surrounded by prolific oil or gas sources. They occurred at formations above or below regional unconformity surfaces and middle Miocene. These big oil fields are the result of tectonic evolution and other geological factors. They compose best spatial assemblage, such as richful source rocks depression, transfer surface between rifting and post-rifting and sandstone reservoirs, Miocene reefs and regional hemipelagic mudstone seals. At last, it points out that targets for oil exploration include sandstone above or below regional unconformity, uplifts in depression, sand bodies close to the source rock and Miocene reefs.

关 键 词：南海 大中型油气田 控制因素 成藏模式 

分 类 号：P738[天文地球—海洋地质] P631[天文地球—海洋科学]