油气藏天然裂缝有效性定量表征技术研究

项目名称： 油气藏天然裂缝有效性定量表征技术研究

项目编号： No.41202096

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 邓虎成

作者单位： 成都理工大学

项目金额： 25万元

中文摘要： 天然裂缝是地层中广泛分布的一种地质构造现象，当其在油气开发过程中保持一定有效性时具有重要作用，其有效程度高低是裂缝性油气藏高产富集的关键。本次研究以井筒附近或地质模型网格单元体内裂缝网络体系作为有效性定量表征对象，通过对四川盆地、鄂尔多斯盆地典型致密砂岩裂缝性油气藏解剖，从动静态资料对裂缝有效性参数（裂缝张开度、裂缝渗透率、裂缝孔隙度）的解释和评价中获得量级可靠、物理意义明确、相互吻合的裂缝参数。在考虑地层条件、裂缝产状等基础上进行裂缝流动实验，利用成像测井等资料对井壁裂缝刻画和三维延拓构建井筒附近双重介质地质模型进行数值模拟研究，获得裂缝有效性主控因素及其影响程度的排序。在裂缝有效性控制因素研究基础上优选裂缝有效性定量表征基础指标，研究裂缝网络体系基础指标的取值量化方法，进而完成基础指标参数的赋权组合构建裂缝有效性定量表征指标，并在实际应用中对表征指标进行了适用性检验和修正。

中文关键词： 裂缝有效性；定量表征；裂缝网络系统；裂缝参数解释模型；

英文摘要： Natural fractures are geological phenomena which widely distributed in the strata， and they've played an important role in maintaining a certain validity in the development process of oil and gas reservoirs. The level of the fracture effectiveness is the key to the oil and gas production of fractured reservoirs. This study is based on the analysis of the typical tight sand reservoir in Sichuan Basin and Ordos Basin. By interpretation and evaluation of the fracture validity parameters (fracture opening width, fracture permeability and fracture porosity) by reservoirs dynamic and static data of reservoirs, the reliable, clear physical meaning and mutually consistent parameters have been achieved. By considering the formation conditions change and fracture occurrence, the flow tests based on fracture physical model has been established. The interpretation of sidewall cracks and three-dimensional extension of near wellbore fractures have been constructed by imaging logging data and the correlation analysis of effectiveness of the fracture parameters has been processed, and therefore, the sequence of the cracks effectiveness and the impacts of the main controlling factors have been acquired. On the basis of the determination of the control factors impact of the fractures, the quantitative characterization of the fra

英文关键词： fracture effectiveness；quantitative characterization；fracture network system；fracture parameter interpretat；