珠江口盆地惠州凹陷恩平组源岩特征及勘探潜力

发布时间：2018-12-17 07:24

【摘要】：惠州凹陷是珠江口盆地已经证实的富生烃凹陷,存在文昌组和恩平组两套有效烃源岩,一直以来都是以文昌组中深湖相烃源岩为勘探重点。随着勘探的深入,惠州地区以恩平组为代表的浅湖-沼泽相烃源岩的贡献越来越明显,惠州凹陷东部新区基本都为浅湖-沼泽相烃源岩供烃,周边井钻探证实该套烃源岩已经成藏。通过构造-结构剖析、物源分析、地震相调研对比、沉积体系细致研究以及对浅湖-沼泽相烃源岩的特征分析,揭示了惠东地区浅湖-沼泽相烃源岩优势发育机理。经过计算,惠东新区浅湖-沼泽相烃源岩资源量为8.6亿t,占到惠东地区总资源量的3/4,具有较大的勘探潜力。在总结惠东新区浅湖-沼泽相烃源岩特征的基础上优选出惠东新区浅湖-沼泽相烃源岩最有利勘探区带。本次研究摆脱了惠州凹陷单一烃源岩勘探束缚,推动了新区勘探进程。
[Abstract]:Huizhou sag is a proven hydrocarbon generating sag in the Pearl River mouth basin. There are two sets of effective source rocks in Wenchang formation and Enping formation, and the exploration emphasis has always been on the source rocks of middle and deep lacustrine facies in Wenchang formation. With the development of exploration, the contribution of shallow lacustrine-marsh facies source rocks represented by the Enping formation in Huizhou area is becoming more and more obvious. The new area in the eastern part of Huizhou sag is basically shallow-lacustry-marsh source rock for hydrocarbon supply. Drilling in peripheral wells confirms that the source rocks have formed reservoirs. Through structure-structure analysis, source analysis, seismic facies investigation and contrast, detailed study of sedimentary system and analysis of the characteristics of shallow lacustry-marsh source rocks, this paper reveals the dominant development mechanism of shallow lacustry-marsh source rocks in Huidong area. The results show that the source rock resource of shallow lacustry-marsh facies in Huidong New area is 860 million t, accounting for 3 / 4 of the total resources in Huidong area, which has great exploration potential. On the basis of summing up the characteristics of shallow lacustry-marsh source rocks in Huidong New area, the most favorable exploration zone of shallow lacustry-marsh facies source rocks in Huidong New area is selected. This study got rid of the single source rock exploration shackles in Huizhou sag and promoted the exploration process in the new area.
【作者单位】：中海石油(中国)有限公司深圳分公司研究院;长江大学油气资源与勘探技术教育部重点实验室;非常规油气湖北省协同创新中心;
【基金】：国家"十三五"重大专项(2016ZX05024-004) 湖北省科技创新群体项目(2016CFA024) 2015高校发展专项基金(K2015-12)
【分类号】：P618.13

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