中文摘要：

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.

英文摘要：

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.