冀中坳陷W20油田东营组沉积相研究

发布时间：2018-04-23 13:01

本文选题：岩性油藏 + 沉积微相　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：W20油田位于冀中坳陷文安斜坡史各庄构造带中部,是文安斜坡东营组的主要产油区块,近年来在W20井区、W11井区和W102井区获得高产油流,展示了W20油田东营组良好的油田勘探开发潜力,是文安斜坡东营组建产的重要区块。但近年来投入开发的生产井具有多套油水系统,砂体连通性不确定,沉积微相认识不清,严重制约着油田后期的滚动开发。本文以层序地层学和高分辨率层序地层为指导,通过对研究区内目的层段岩心的观察与描述,综合运用录井和测井资料,结合地球物理资料,对W20油田东营组的沉积微相特征进行研究;在对研究区生产井进行油水分析的基础上,理清了研究区的油藏类型,并以此为基础提出了研究区东营组的有利油气发育区。在以上研究的基础上,主要得到以下结论认识:1.以层序地层学和高分辨率层序地层学为理论指导,综合运用录井、测井和岩心资料,同时利用研究区满覆盖的三维地震资料,将W20油田东营组地层划分为一个中期旋回、两个短期旋回和四个超短期旋回。2.以研究区及其周边区域东营组岩心的观察与描述为基础,以地球物理测井曲线为手段,分析总结出适应研究区目的层的测井相模板,并在此基础上对单井进行了沉积微相分析,共识别出边滩、天然堤、河漫滩以及河漫沼泽等沉积微相。3.通过对研究区生产井油水关系以及砂体展布关系的综合分析,认为研究区东营组目的层段主要以构造岩性油藏和岩性油藏为主。其中构造岩性油藏主要受断层影响,断层对油气形成侧向封堵作用;岩性油藏主要受砂体展布形态与古地貌的影响。综合研究区的圈闭类型和油藏类型的特征,提出了研究区的有利油气聚集区,为下一步的评价建产提供了技术支持。
[Abstract]:W20 oil field is located in the middle of Shigezhuang structural belt of Wenan slope in Jizhong depression. It is the main oil producing block in Dongying formation of Wenan Slope. In recent years, high oil flow has been obtained in Weiw11 well area and W102 well area in W20 well area. The good exploration and development potential of Dongying formation in W20 oilfield is demonstrated, which is an important block of Dongying formation in Wenan Slope. But the production wells put into development in recent years have many sets of oil-water system, sand body connectivity is uncertain, sedimentary microfacies is not clear, which seriously restricts the rolling development of oil field in the later stage. Under the guidance of sequence stratigraphy and high-resolution sequence stratigraphy, this paper, by observing and describing the core of the target formation in the study area, synthetically uses logging and logging data, combined with geophysical data. The sedimentary microfacies characteristics of Dongying formation in W20 oilfield are studied, and the reservoir types of the study area are clarified on the basis of oil and water analysis of production wells in the study area, and the favorable oil-gas development area of Dongying formation in the study area is proposed. On the basis of the above research, the following conclusions are obtained: 1: 1. Under the guidance of sequence stratigraphy and high resolution sequence stratigraphy, the formation of Dongying formation in W20 oilfield is divided into a middle cycle using mud logging, logging and core data, and using the three dimensional seismic data of full coverage in the studied area at the same time, the formation of Dongying formation in W20 oilfield is divided into a middle cycle. Two short term cycles and four ultra short term cycles. 2. Based on the observation and description of Dongying formation core in and around the study area, and by means of geophysical logging curve, the log facies template of the target layer adapted to the study area is analyzed and summarized, and the sedimentary microfacies of single well are analyzed. The sedimentary microfacies, such as banks, natural embankments, floodplains and river swamps, were identified. Based on the comprehensive analysis of the oil-water relationship of production wells and the distribution of sand bodies in the study area, it is considered that the main reservoir of the Dongying formation in the study area is structural lithologic reservoir and lithologic reservoir. The structural lithologic reservoirs are mainly affected by faults, which have lateral sealing effect on oil and gas formation, and the lithologic reservoirs are mainly affected by the distribution of sand bodies and paleogeomorphology. Based on the characteristics of trap type and reservoir type in the study area, the favorable oil and gas accumulation area in the study area is put forward, which provides technical support for the evaluation of construction and production in the next step.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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