【摘要】：以前人研究成果為基礎(chǔ),結(jié)合構(gòu)造演化、沉積充填特征及地球化學指標分析,對南海南部3個主要盆地進行了油氣分布規(guī)律及主控因素研究。結(jié)果表明,萬安盆地和曾母盆地發(fā)育漸新統(tǒng)—下中新統(tǒng)煤系和陸源海相2類主力烴源巖,干酪根類型為Ⅱ—Ⅲ型;文萊—沙巴盆地發(fā)育中中新統(tǒng)—上新統(tǒng)煤系烴源巖,干酪根類型為Ⅱ2—Ⅲ型。萬安盆地油氣富集于中新統(tǒng)儲層,平面上具有"西油東氣"的分布特征;曾母盆地油氣富集于漸新統(tǒng)—中新統(tǒng)儲層,具有"下油上氣"分布特征,平面上具有"南油北氣"的分布格局;文萊沙巴盆地油氣富集于中中新統(tǒng)—上新統(tǒng)砂巖儲層,近岸淺水區(qū)是油氣主要富集區(qū)。3個盆地受古南海消亡和新南海擴張的控制,主力烴源巖發(fā)育時期沉積環(huán)境各異,后期盆地內(nèi)成熟度的差異性控制油氣分布的區(qū)帶性,構(gòu)造運動在各盆地的響應(yīng)機制導(dǎo)致油氣成藏具有明顯規(guī)律性。
[Abstract]:On the basis of previous research results, combined with structural evolution, sedimentary filling characteristics and geochemical index analysis, the oil and gas distribution and main controlling factors of three main basins in the southern South China Sea have been studied. The results show that two main source rocks of Oligocene-Lower Miocene coal measures and continental source-marine facies are developed in Wan'an Basin and Zengmu Basin. The kerogen type is of type 鈪，

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