珠江口盆地陆丰13洼复式油气成藏条件、分布规律及勘探潜力  

Reservoir-forming conditions,oil distribution and exploration potential of compound hydrocarbon reservoirs in the Lufeng 13 sag in Pearl River Mouth basin

作　　者：汪旭东 张向涛 林鹤鸣 阙晓铭 李敏 WANG Xudong;ZHANG Xiangtao;LIN Heming;QUE Xiaoming;LI Min(CNOOCChina Limited,Shenzhen Branch,Shenzhen,Guangdong 518000,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《中国海上油气》2018年第3期19-27,共9页China Offshore Oil and Gas

基　　金：中国海洋石油集团有限公司综合科研项目"陆丰地区古近系低孔渗储层甜点形成机理及成藏规律研究(编号:YXKY-2015-SZ-02)"部分研究成果

摘　　要：陆丰凹陷陆丰13洼是珠江口盆地重点研究区域,发育多构造层的复式地层结构。利用最新的三维地震解释成果,并结合新钻井获得的地质、地球化学资料分析认为,紧邻富生烃洼陷油源供给充足、由断裂和砂体组成的复式输导体系以及复式地层结构形成多套成藏组合是陆丰13洼复式油气成藏的有利地质条件;陆丰13洼具有"一源多储,立体含油"的复式油气成藏特征,平面上油气主要分布在环洼低凸起、近洼斜坡和洼内中央背斜等3个复式油气聚集带;典型油气藏解剖分析表明,不同复式油气聚集带的含油层位、输导体系、油藏类型、原油类型、运聚模式等有着明显差异。以复式油气聚集带理论为指导,结合勘探实践,认为下一步勘探应主攻近洼斜坡带古近系大型构造岩性复合圈闭和洼内中央背斜带两翼构造圈闭,而环洼低凸起复式油气聚集带剩余勘探潜力有限。The Lufeng 13 sag in the Lufeng depression,a key research zone of the Pearl River Mouth basin,develops a compound stratigraphic texture with multi-structural layers.The latest 3 D seismic interpretation and analysis of geology and geochemistry data from new wells suggest that multiple sets of reservoir assemblages,which are framed by a compound migration system of fractures and sand bodies near to the hydrocarbon-rich sag and a compound stratigraphic texture,are in favor of the compound-reservoir forming in the Lufeng13 sag.The compoundreservoir forming is featured by＂one source for multiple reservoirs,oil bearing in tri-dimensional space＂in the sag,where hydrocarbons in the plane mainly distribute in three oil and gas accumulation zones of the low highs around the sag,near-to-sag slope area and central anticline in the sag,respectively.The typical dissection and analysis of oil and gas reservoirs indicates the three compound hydrocarbon accumulation zones have distinct variations in oilbearing horizons,migration system,oil reservoir types,crude oil types,migration and accumulation patterns,etc..Guided by the theory on compound hydrocarbon accumulation belts and exploration practices,the further exploration should focus on Palaeogene large-scale structural and lithological compound traps and structural traps in the two flanks of the central anticline belt in the sag,rather than the compound hydrocarbon accumulation belt of low highs around the sag with limited exploration potential.

关 键 词：陆丰凹陷 陆丰13洼 复式油气聚集带 成藏条件 分布规律 勘探潜力 

分 类 号：TE122[石油与天然气工程—油气勘探]