巴布亚前陆盆地东部构造特征及油气圈闭类型

发布时间：2018-03-18 10:15

本文选题：构造演化　切入点：巴布亚盆地　出处：《石油地球物理勘探》2016年01期 　论文类型：期刊论文

【摘要】：在调研前人研究成果的基础上,以地震资料最为详实的巴布亚湾海域区块为例,从区域构造演化入手,探讨研究区构造特征及油气圈闭类型,得出以下认识:1盆地主要经历了裂谷前基底期、冈瓦纳同生裂谷—裂后期、珊瑚海同生裂谷—裂后期、达拉伊弧后伸展期和前陆盆地期等演化阶段,沉积地层垂向呈"二元结构",即前陆构造层叠加在达拉伊弧后及其下的裂谷—裂后期构造层之上,并呈楔状向南西西快速减薄超覆于东部高地之上;2巴布亚湾海域区块形成了以欧拉褶皱带为前陆冲断带、以莫尔比拗陷为前渊带、以东部高地为前陆隆起和以布莱盆地为隆外拗陷的前陆盆地系统;3初步分析圈闭类型和油气成藏条件后认为,裂谷—裂后和弧后伸展阶段形成优质海相烃源岩,前陆期形成良好的储盖组合;前陆冲断带发育的成排、成带逆冲背斜为首选钻探目标,前渊带的扇三角洲岩性体、浊积水道和前陆隆起带潜山构造及复合圈闭为潜在目标。
[Abstract]:Based on the previous research results, taking the Papua Bay block with the most detailed seismic data as an example, starting with the regional tectonic evolution, the structural characteristics and the types of oil and gas traps in the study area are discussed. It is concluded that the following major stages of evolution of the basin are pre-rift basement, Gondwana synrift and late rift, coral sea synrift and late rift, Darayi back-arc extension and Foreland basin. The vertical direction of sedimentary strata is "binary structure", that is, the Foreland tectonic layer is superimposed on the structural layer behind the Darayi arc and its lower rift to the late rift. And the rapid thinning and overlying in the west west toward the south of the wedge formed the Euler fold belt as the Foreland thrust zone, and the Morby depression as the foredeep zone, which was formed in the block of Papua Bay on the eastern highlands. The Foreland basin system with the eastern highlands as the Foreland uplift and the Buli basin as the outer depression is considered to be a high-quality marine source rock during the rift-post-rift and back-arc extension stages after preliminary analysis of the trap types and the oil and gas accumulation conditions. A good reservoir cap assemblage was formed in the Foreland period, rows of Foreland thrust belts developed, belt thrust anticlines as the preferred drilling targets, fan delta lithologic bodies in the foredeep zone, buried hill structures and composite traps in the turbid hydrops and Foreland uplift zones as potential targets.
【作者单位】：中国地质大学(北京)能源学院;东方地球物理公司研究院大港分院;东方地球物理公司研究院油气评价开发研究所;东方地球物理公司研究院资料处理中心;
【基金】：国家自然科学基金项目(41202088)资助
【分类号】：P618.13

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