大庆油田南一区西部萨葡油层地震反演预测研究

发布时间：2018-05-20 02:06

本文选题：沉积微相 + 地震反演　；参考：《东北石油大学》2017年硕士论文

【摘要】：随着常规易采油气藏产量的减少,油气藏勘探的工作重心逐渐转移到寻找隐蔽油气藏、薄互层油气藏及精细刻画储油层的地下展布,这就要求相应的勘探技术不断地提高。地震反演技术可实现测井、地震的优势互补,显著地提高三维地震资料的纵向分辨率,可以适应越来越复杂的地质环境和勘探任务。南一区西部萨葡油层储层沉积类型多样,预测精度低,如何提高储层预测精度是目前亟待解决的问题。本文以大庆油田南一区西部萨葡油层为研究对象,从建立研究区高分辨率层序格架入手,剖析了储层沉积微相发育特征,研究了河道宽度、隔层条件、砂体规模等基本地质条件;并结合各层段河道规模及河道与非河道的占比来约束水平变程,提高了预测精度;根据研究区实际情况,进行约束稀疏脉冲联合地质统计学反演;以此为基础,形成基于古河道指导的地震反演方法,提高了储层预测效果,反演可信度高。基于反演结果,对研究区南一区西部萨葡油层5个油层组的河道砂体展布进行了刻画,并根据砂体规模对研究区沉积单元进行分类。同时结合地震反演平面图对河道边界、河道宽度以及河道组合模式进行精细刻画。研究成果提高了井间储层的预测精度,为研究区完善注采关系提供依据。
[Abstract]:With the decrease of conventional oil and gas reservoir production, the focus of oil and gas exploration is gradually shifted to the exploration of subtle reservoirs, thin interbed reservoirs and the underground distribution of fine characterization of reservoir, which requires the corresponding exploration technology to be improved continuously. Seismic inversion technology can realize well logging, complement the advantages of earthquakes, improve the vertical resolution of 3D seismic data, and adapt to more and more complex geological environment and exploration tasks. There are a variety of sedimentary types and low prediction accuracy in the reservoir in the west of South China first area. How to improve the accuracy of reservoir prediction is an urgent problem to be solved at present. In this paper, the development characteristics of sedimentary microfacies, channel width and interval conditions are analyzed from the establishment of high-resolution sequence framework in the western sap reservoir in the southern first area of Daqing Oilfield. The basic geological conditions, such as sand body size, and combining the river channel size of each section and the ratio of channel to non-channel to constrain the horizontal variation, improve the prediction accuracy, and carry out constrained sparse pulse combined geostatistical inversion according to the actual situation in the study area. Based on this, the seismic inversion method based on paleochannel guidance is formed, which improves the reservoir prediction effect and has high inversion reliability. Based on the inversion results, the distribution of river channel sand bodies of 5 reservoirs in the west of Sapu reservoir in the south and west of the study area is described, and the sedimentary units in the study area are classified according to the scale of the sand bodies. At the same time, the river channel boundary, channel width and channel combination model are described in detail with seismic inversion plan. The research results improve the prediction accuracy of cross-well reservoir and provide the basis for improving the injection-production relationship in the study area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13;P631.4

【参考文献】