低渗透油藏非线性流数值模拟与极限井距研究  

STUDIES ON THE NUMERICAL SIMULATION AND CRITICAL SPACING OF NONLINEAR-FLOW LOW-PERMEABILITY OIL RESERVOIRS

作　　者：张允[1] 常铁龙[1] 薛亮[2] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石油大学石油工程学院,山东青岛266555

出　　处：《大庆石油地质与开发》2013年第1期97-100,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国博士后科学基金特别资助项目“基于多尺度有限元的离散裂缝网络模型数值模拟”（201003220）.

摘　　要：达西渗流已经无法准确描述低渗透油藏中流体的流动。研究了低渗透油藏启动压力梯度数学表征方法，建立了考虑启动压力梯度非线性渗流模型及其油气水三相数模模拟的数学模型，并形成了相应的数值模型。在现有数值模拟软件的基础上编制了非线性渗流数值模拟插件，并将其应用到油田模型中，模拟了不同渗透率下低渗透油藏注水驱油过程。初步模拟结果与现场实际数据基本吻合，验证了方法的正确性，获得了启动压力梯度与极限注采井距的关系图版，为低渗透油藏开发提供了依据。Since Darcy Law is unable to accurately describe the fluid flows in low-permeability oil reservoirs, the mathematical characterizing method of the start-up pressure gradients is developed for the reservoirs, the nonlinear flow model considering the above gradients and the mathematical model and numerical model with three-phase fluids are established. At the same time, the corresponding numerical simulation is generated as well. On the basis of the current numerical simulation softwares, the packges of the non-linear flow numerical simulation are programed and moreover they will be applied in the field model, the water-flooded process of low-permeability oil reservoirs with different permeabilities is simulated. The results of the preliminary simulation are generally coincident with the ac- tual data of the field, thus the accuracy of the above method is proved, the chart board of the relation between the gradients and critical spacing is obtained, so the evidence for the development of low-permeability oil reservoirs are provided.

关 键 词：低渗透油藏 非线性渗流 启动压力梯度 数值模拟 极限注采井距 

分 类 号：TE348[石油与天然气工程—油气田开发工程]