源外斜坡区断裂密集带对油气成藏的控制作用：以松辽盆地肇源南扶余油层为例
来源期刊：中南大学学报(自然科学版)2012年第9期
论文作者：肖佃师 卢双舫 陈海峰 王婵娟
文章页码：3548 - 3557
关键词：肇源南地区；扶余油层；断裂密集带；长期同生断裂；油气运移和聚集
Key words：Zhaoyuannan region; Fuyu oil layer; fault condensed belts; long-term growth fault; hydrocarbon migration and accumulation
摘 要：利用精细构造解释、储层预测及小层沉积微相的研究成果，分析肇源南地区断裂发育特征，探讨不同期次断裂对扶余油层沉积砂体的控制作用，结合油水分布特点研究肇源南地区断裂密集带对油气成藏的控制作用。研究结果表明：肇源南地区扶余油层断裂由中期和长期发育断裂组成，受基底断裂控制平面上呈8条密集带分布。在源岩大规模生排烃期东部断裂密集带北北西向断层复活开启，而西部断裂密集带仅边界断层复活开启。受基底断裂和长期同生断裂共同控制，西部断裂密集带与河道砂体呈高角度相交、或河道砂体在边界断层上升盘长距离延伸2种关系；而东部断裂密集带与河道砂体呈低角度相交。肇源南地区扶余油层油成藏模式为：三肇凹陷扶杨油层中的油在浮力作用下沿被河道砂体沟通的断裂密集带长距离侧向运移至肇源南地区，在断裂密集带附近的断块、断层岩性圈闭中聚集成藏。断裂密集带上油输导方式及聚集部位受断层活动性质、及密集带与河道砂体组合关系控制：东部断裂密集带上开启性断层与河道砂体形成“输导断层-岩性”输导体系，密集带内断块、及两侧断层岩性圈闭均有油聚集；西部断裂密集带上边界断层上升盘一侧形成“边界断层-岩性”高效输导脊，由密集带2侧断层岩性圈闭向内部断块含油性逐渐变差。
Abstract: By using the results about fine structure interpretation, reservoir prediction and sublayer sedimentary microfacies, development characteristics of faults and their control to the deposition of Fuyu oil layer in Zhaoyuannan region were discussed, and then control effect of fault condensed belts in hydrocarbon accumulation was researched with the distribution of oil and water in Zhaoyuannan region. The results show that faults of Fuyu oil layer are made up of middle and long-term faults, and there are eight condensed belts in the plane by the control of basement faults. When hydrocarbons in source rocks are generated and then expelled, the NNW-trending faults were reactivated in eastern fault condensed belts, while only boundary faults were reactivated in the western. By the control of basement and long-term growth faults, there are two spatial combinations between western fault condensed belts and distributary channel: high-angle intersection or distributary channel’s long-distance extension along fault condensed belts in the upside of boundary faults, while the spatial combinations between eastern fault condensed belts and distributary channel is low-angle intersection. The oil in Fuyang layers, Sanzhao Depression migrates laterally to Zhaoyuannan region along the fault condensed belts connected by sand bodies with the buoyancy force and then accumulated in fault block, and fault-lithologic traps besides fault condenses belts. Hydrocarbon migration and accumulation in fault condensed belts is controlled by fault activity and spatial combinations between fault condensed belts and distributary channel: In eastern “transporting fault-sand” system is formed by reactive faults and distributary channel, and fault block within, fault-lithologic traps besides fault condensed belts are both accumulated by oil; In western “boundary fault-sand” transporting ridge is formed in the upside of boundary faults of condensed belts, and the oiliness becomes gradually poor from fault-lithologic traps besides to fault block within fault condensed belts.
肖佃师，卢双舫，陈海峰，王婵娟
(东北石油大学 地球科学学院，黑龙江 大庆，163318)
摘 要：利用精细构造解释、储层预测及小层沉积微相的研究成果，分析肇源南地区断裂发育特征，探讨不同期次断裂对扶余油层沉积砂体的控制作用，结合油水分布特点研究肇源南地区断裂密集带对油气成藏的控制作用。研究结果表明：肇源南地区扶余油层断裂由中期和长期发育断裂组成，受基底断裂控制平面上呈8条密集带分布。在源岩大规模生排烃期东部断裂密集带北北西向断层复活开启，而西部断裂密集带仅边界断层复活开启。受基底断裂和长期同生断裂共同控制，西部断裂密集带与河道砂体呈高角度相交、或河道砂体在边界断层上升盘长距离延伸2种关系；而东部断裂密集带与河道砂体呈低角度相交。肇源南地区扶余油层油成藏模式为：三肇凹陷扶杨油层中的油在浮力作用下沿被河道砂体沟通的断裂密集带长距离侧向运移至肇源南地区，在断裂密集带附近的断块、断层岩性圈闭中聚集成藏。断裂密集带上油输导方式及聚集部位受断层活动性质、及密集带与河道砂体组合关系控制：东部断裂密集带上开启性断层与河道砂体形成“输导断层-岩性”输导体系，密集带内断块、及两侧断层岩性圈闭均有油聚集；西部断裂密集带上边界断层上升盘一侧形成“边界断层-岩性”高效输导脊，由密集带2侧断层岩性圈闭向内部断块含油性逐渐变差。
关键词：肇源南地区；扶余油层；断裂密集带；长期同生断裂；油气运移和聚集
XIAO Dian-shi, LU Shuang-fang, CHEN Hai-feng, WANG Chan-juan
(Geoscience College, Northeast Petroleum University, Daqing 163318, China)
Abstract:By using the results about fine structure interpretation, reservoir prediction and sublayer sedimentary microfacies, development characteristics of faults and their control to the deposition of Fuyu oil layer in Zhaoyuannan region were discussed, and then control effect of fault condensed belts in hydrocarbon accumulation was researched with the distribution of oil and water in Zhaoyuannan region. The results show that faults of Fuyu oil layer are made up of middle and long-term faults, and there are eight condensed belts in the plane by the control of basement faults. When hydrocarbons in source rocks are generated and then expelled, the NNW-trending faults were reactivated in eastern fault condensed belts, while only boundary faults were reactivated in the western. By the control of basement and long-term growth faults, there are two spatial combinations between western fault condensed belts and distributary channel: high-angle intersection or distributary channel’s long-distance extension along fault condensed belts in the upside of boundary faults, while the spatial combinations between eastern fault condensed belts and distributary channel is low-angle intersection. The oil in Fuyang layers, Sanzhao Depression migrates laterally to Zhaoyuannan region along the fault condensed belts connected by sand bodies with the buoyancy force and then accumulated in fault block, and fault-lithologic traps besides fault condenses belts. Hydrocarbon migration and accumulation in fault condensed belts is controlled by fault activity and spatial combinations between fault condensed belts and distributary channel: In eastern “transporting fault-sand” system is formed by reactive faults and distributary channel, and fault block within, fault-lithologic traps besides fault condensed belts are both accumulated by oil; In western “boundary fault-sand” transporting ridge is formed in the upside of boundary faults of condensed belts, and the oiliness becomes gradually poor from fault-lithologic traps besides to fault block within fault condensed belts.
Key words:Zhaoyuannan region; Fuyu oil layer; fault condensed belts; long-term growth fault; hydrocarbon migration and accumulation
