葡西油田黑帝庙油层高分辨率层序地层及控油模式

发布时间：2018-04-20 16:30

  本文选题：高分辨率层序地层学 + 岩性油气藏　； 参考：《东北石油大学》2015年硕士论文

【摘要】：本文在高分辨率层序地层学和精细沉积学的指导下,利用研究区的取心井、测井、地震等资料进行综合分析,根据“逐级标准等时面逼近旋回对比”的对比方法,将葡西油田黑帝庙油层(H2)划分为分为1个中期基准面旋回、5个短期基准面旋回、10个超短期基准面旋回,建立了全区统一精细的高分辨率层序地层格架,提出了“地层西薄东厚、南薄北厚,SSSC1为最大水退面,总体基准面持续下降”的地层发育模式。在精细等时格架的控制下分析了物源、沉积相特征,提出了研究区黑帝庙油层主要为北部及西北物源沉积,为河控缓坡三角洲沉积体系,总体呈北-南向展布,反映了湖盆向上逐步萎缩的一个沉积背景下形成的反旋回砂泥岩沉积体系,不存在分流平原亚相,水下分流河道向湖盆推进,形成窄枝状的水下分流河道,在水下分流河道的两侧大面积发育席状砂,河口坝呈点状分布,在SSSC5~SSSC9发育垂直于水下分流河道走向的远砂坝,储集层主要为水下分流河道砂体、河口坝砂体、远砂坝砂体及少量席状砂。在建立地层格架、确立物源及确立沉积微相单砂体空间分布的基础之上,以油气成藏系统等现代油气地质学等理论为指导,运动区域成藏分析技术、单砂体控油模式分析技术等,结合现场动态资料,动静结合分析研究区黑帝庙油层的油气分布规律,在完成了油气纵向、平面上油气分布规律的基础上,对油气藏的类型及其特征进行分析,揭示了单一圈闭内部局部构造与单砂体控制油气分布边界,单砂体纵向分布位置控制油气分布层位的特点。垂向上发育层数多、平面上变化快的砂体与复杂的局部构造在空间上相组合是造成研究区复杂油水分布的根本原因,局部构造与单砂体的空间组合关系是单一圈闭内控油的主要影响因素。对下一步的岩性油气藏的勘探与开发有实用和指导价值。
[Abstract]:Under the guidance of high resolution sequence stratigraphy and fine sedimentology, the coring wells, logging and seismic data in the study area are used for comprehensive analysis, and according to the comparison method of "step by step standard isochron approximation cycle correlation", The H2 of Heidimiao oil reservoir in Puxi Oilfield is divided into 1 intermediate base-level cycle, 5 short-term base-level cycles and 10 ultra-short-term base-level cycles. The fine high-resolution sequence stratigraphic framework of the whole region is established, and the "formation thickness in the west, thin and east" is proposed. The model of stratigraphic development is that SSSC1 is the largest water regression surface and the general datum level is decreasing continuously. Under the control of fine isochronous frame, the characteristics of source and sedimentary facies are analyzed, and it is suggested that the northern and northwest provenance deposits of Heidimiao oil layer in the study area are mainly fluvial gentle slope delta sedimentary systems, which are distributed generally in a north-south direction. It reflects the anti-cyclic sand and mudstone sedimentary system formed under a sedimentary background that the lake basin gradually shrinks upward, and there is no distributary plain subfacies, and the underwater distributary channel advances to the lake basin and forms a narrow branched underwater distributary channel. Sheet sand is developed on both sides of underwater distributary channel, and estuarine dam is distributed in dot shape. In SSSC5~SSSC9, the reservoir is mainly composed of underwater distributary channel sand body and estuarine bar sand body, which is perpendicular to underwater distributary channel. Far sand bar sand body and a small amount of sheet sand. Based on the establishment of stratigraphic framework, provenance and spatial distribution of sedimentary microfacies single sand body, and guided by modern oil and gas geological theories, such as oil and gas accumulation system, the technique of reservoir forming analysis in moving regions is used. The oil and gas distribution law of Heidimiao oil reservoir in the study area is analyzed by combining the oil and gas control model analysis technique of single sand body and field dynamic data. On the basis of completing the oil and gas vertical and plane oil and gas distribution law, the oil and gas distribution law of Heidimiao oil and gas reservoir has been studied. The types and characteristics of oil and gas reservoirs are analyzed. The characteristics of local structure in single trap and single sand body controlling oil and gas distribution boundary and single sand body vertical distribution position control oil and gas distribution horizon are revealed. The spatial combination of rapidly changing sand bodies and complex local structures is the fundamental reason for the complex distribution of oil and water in the study area. The spatial combination relationship between local structure and single sand body is the main influencing factor of oil control in single trap. It has practical and guiding value for the exploration and development of lithologic reservoirs in the next step.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P539.2

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