裂缝性油气藏天然裂缝表示方法及软件开发

发布时间：2018-07-31 18:36

【摘要】：在裂缝性油气藏中,天然裂缝是油气的有效储集空间和主要渗流通道,它们控制着油气的渗流规律以及在注水开发过程中的流体运动规律,是裂缝性油气藏开发的基础。应用合适的裂缝表示方法对天然裂缝的角度和地应力信息进行表示,并开发相应的图形表示软件,对裂缝性油气藏的勘探开发有着重要意义。本文主要研究了几种主要的裂缝性油气藏天然裂缝表示方法,并开发裂缝性油气藏天然裂缝图形表示软件。具体工作如下:总结了几种主要的天然裂缝表示方法,包括蝌蚪图、玫瑰图、三维莫尔圆、球面投影图等,并研究了四种衡量天然裂缝力学状态的模式,即库伦破坏函数模式、临界孔隙压力模式、临界衰竭或注入模式、临界摩擦系数模式。应用WPF技术、MVVM模式开发软件,根据需求分析结果,进行了软件的功能划分,包括数据读取与数据展示模块、数据统计模块、数据分析模块和三维展示模块。实现了天然裂缝表示方法的图形化功能,准确、直观地表达了裂缝参数间的相互关系、裂缝参数与地质要素的相关关系,可以帮助用户更直观地观察裂缝信息、判断原始地应力与裂缝几何形状之间的关系、确定油藏区域中处于临界应力状态且可能具有渗透性的裂缝。本软件在塔里木油田某油井进行了以判断优势裂缝走向为目的的应用。软件为该井以提高产量为目的的压裂方法优化提供了重要参考依据。
[Abstract]:In fractured reservoirs, natural fractures are the effective reservoir space and main percolation channel of oil and gas. They control the percolation law of oil and gas and the law of fluid movement in the process of water injection development, and are the basis of the development of fractured reservoirs. It is of great significance for the exploration and development of fractured reservoirs to express the angle and stress information of natural fractures by appropriate fracture representation method and to develop the corresponding graphic representation software. In this paper, several main natural fracture representation methods for fractured reservoirs are studied, and a graphic representation software for natural fractures in fractured reservoirs is developed. The main work is as follows: several main natural crack representation methods are summarized, including tadpole diagram, rose diagram, three-dimensional moire circle, spherical projection diagram, and four models to measure the mechanical state of natural cracks, namely Coulomb failure function model, are studied. Critical pore pressure model, critical failure or injection model, critical friction coefficient model. The software is developed by using WPF technology. According to the result of requirement analysis, the functions of the software are divided, including data reading and data display module, data statistics module, data analysis module and 3D display module. The graphic function of the natural fracture representation method is realized, and the correlation between fracture parameters and geological elements is expressed accurately and intuitively, which can help users to observe fracture information more intuitively. The relationship between the original in-situ stress and the geometric shape of the fracture is determined, and the fracture in the reservoir area which is in the critical stress state and may have permeability is determined. The software is used in a well in Tarim Oilfield to judge the strike of dominant fractures. The software provides an important reference for the optimization of fracturing method in order to increase production.
【学位授予单位】：中国石油大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE319;TP311.52

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