發(fā)布時間：2018-04-03 20:09

  本文選題：潛山　切入點：油氣成因　出處：《石油學報》2017年11期

【摘要】：Bongor盆地前寒武系基巖潛山裂縫油藏的發(fā)現打開了非洲陸上油氣勘探的新領域。潛山油源問題是制約Bongor盆地勘探進程的因素之一。為了解決這一問題,充分利用潛山原油有機地球化學分析測試數據,研究M-P區(qū)、B區(qū)潛山原油的生物標志化合物組成和地球化學特征,分析M-P區(qū)、B區(qū)潛山原油與M凹陷烴源巖和BN凹陷間的油源關系;結合Bongor盆地熱演化史以及構造演化史,分析M-P區(qū)、B區(qū)潛山油藏帶的油氣成藏過程。研究結果表明:M-P區(qū)潛山原油主要來自M凹陷烴源巖,B區(qū)潛山原油接受M凹陷烴源巖和BN凹陷雙重貢獻。M凹陷烴源巖在晚白堊世中期開始向B區(qū)潛山帶供烴,晚白堊世中期—晚期,M凹陷、BN凹陷烴源巖所生成的原油共同在B區(qū)潛山帶聚集成藏,同時M凹陷烴源巖生成的原油在M-P區(qū)潛山帶運移聚集形成潛山油氣藏。
[Abstract]:The discovery of Precambrian bedrock buried-hill fractured reservoirs in Bongor basin opens up a new field of onshore oil and gas exploration in Africa.The problem of buried hill oil source is one of the factors restricting the exploration process of Bongor basin.In order to solve this problem, the composition of biomarker compounds and geochemical characteristics of buried hill crude oil in M-P area are studied by using the organic geochemical analysis and testing data of buried hill crude oil.The oil source relationship between buried hill crude oil and source rocks and BN sag in M sag is analyzed, and the hydrocarbon accumulation process in buried hill reservoir belt of Bongor basin is analyzed in combination with thermal evolution history and structural evolution history of Bongor basin.The results show that the buried hill crude oil in the Wei M-P area is mainly derived from the buried hill oil from the M sag source rock and the BN sag. The source rocks in the M sag began to supply hydrocarbon to the buried hill zone in the middle of the late Cretaceous.The source rocks generated from the source rocks of the mid-late Cretaceous to the late Cretaceous are accumulated in the buried-hill zone of area B, and the oil generated from the source rocks of the M depression migrates and accumulates in the buried hill zone of the M-P area to form a buried hill reservoir.
【作者單位】： 長江大學資源與環(huán)境學院長江大學油氣資源與勘探技術教育部重點實驗室;中國石油勘探開發(fā)研究院;中國石油天然氣勘探開發(fā)公司;
【基金】：國家重大科技專項(2011ZX05029) 中國石油天然氣股份有限公司科技專項(2013D-0902)資助
【分類號】：P618.13

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本文編號：1706724