辽河坳陷欧利坨子地区构造成因及石油地质意义

发布时间：2018-03-05 14:49

本文选题：辽河坳陷　切入点：欧利坨子　出处：《中国石油勘探》2016年06期 　论文类型：期刊论文

【摘要】：欧利坨子地区是辽河油田稀油年产500×10~4t的重要资源接替区,石油地质储量近3000×10~4t。通过对新采集处理的三维地震资料以及钻井、测井资料进行解释和构造发育史研究,分析了欧利坨子地区新生界古近系的构造特征及成因,并探讨了其对油气运移、成藏的控制作用,指出了下一步有利勘探目标。研究认为:(1)古近纪为欧利坨子地区构造格局的定型期,其构造演化先后经历了拱张、裂陷、衰减、再陷4个阶段,主要构造运动为沙三段沉积时期的伸展运动和东营组沉积时期的走滑运动;(2)研究区现今构造格局是伸展构造体系与走滑构造体系叠加而形成的,南、北构造差异演化是正、逆断层相间的特殊花状构造的形成原因并导致了同一条断层性质发生正逆转换;(3)主干断层在油气运移时期表现为封闭性,起遮挡作用,不利于油气的二次运移;(4)剧烈的构造运动在很大程度上改善了储层物性;(5)花状构造高部位、依附于主干断层的断鼻等是油气聚集的最有利区域,西部超覆带发育地层油气藏。
[Abstract]:The Oulituozi area is an important resource replacement area of Liaohe Oilfield with an annual production of 500 脳 10 ~ (4) tons of oil. The petroleum geological reserves are nearly 3000 脳 10 ~ (4) t. Through the interpretation and structural development history of the newly acquired and processed 3D seismic data and drilling and drilling, the logging data are studied. The structural characteristics and genesis of the Cenozoic Paleogene in the Oulituozi area are analyzed, and its controlling effect on oil and gas migration and reservoir formation is discussed. It is considered that the Paleogene period is the formative stage of the tectonic framework in the Oulituozi area, and its tectonic evolution has undergone four stages: arch extension, fissure, attenuation, and re-subsidence. The main tectonic movement is the extensional movement in the sedimentary period of the third member of Sha and the strike-slip movement in the sedimentary period of the Dongying formation.) the present tectonic framework in the study area is formed by the superposition of the extensional and strike-slip tectonic systems, and the difference between the southern and northern tectonic evolution is positive. The formation of the special flower-like structure in the interphase of the reverse faults and the occurrence of the same fault property caused by the positive and inverse transformation of the main faults are characterized by the sealing of the main faults during the oil and gas migration period, which play a blocking role. The intense tectonic movement which is unfavorable to the secondary migration of oil and gas can improve the reservoir physical properties to a great extent) the high position of flower-shaped structure, which is attached to the fault nose of the main fault, is the most favorable area for oil and gas accumulation, and the stratigraphic reservoirs are developed in the western overlying zone.
【作者单位】：中国石油辽河油田公司勘探开发研究院;中国矿业大学(北京)地球科学与测绘工程学院;
【基金】：国家自然科学基金项目“高煤级煤层气储层应力敏感性及控制机理”(41172145)
【分类号】：P618.13

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