水湿储层水驱油微观驱替特征的网络模拟研究  

Network Simulation for the Microscopic Displacement Characteristics of Water Displacing Oil in the Water-Wet Reservoirs

作　　者：尹洪军[1,2] 王美楠[1,2] 钟会影[1,2] 谢毅[1,2] 

机构地区：[1]非常规油气成藏与开发省部共建国家重点实验室培育基地,黑龙江大庆163318 [2]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《数学的实践与认识》2013年第19期94-102,共9页Mathematics in Practice and Theory

基　　金：黑龙江省教育厅科学技术研究项目(12521052)

摘　　要：应用逾渗理论,基于计算机随机建模方法,建立了水湿储层三维网络模型.模型的孔隙喉道半径采用截断式威布尔分布随机产生,通过与实际岩心相渗曲线的拟合,验证了模型的有效性.计算了形状因子、孔隙度、导流率等参数,为模拟过程提供基础数据.应用建立的网络模型,模拟了饱和油和水驱油两个驱替过程,分析了孔隙特性参数对相对渗透率及驱替效率的影响.结果表明:随着孔喉比的降低、配位数的增加、形状因子的增加(在一定范围内),水相渗透率降低,油相渗透率升高,残余油饱和度降低,驱替效率增大.与其他理想模型相比,模型可以更真实地研究油水两相流动特征.Using percolation theory, based on the computer stochastic modeling method, a three-dimensional network model of water-wet reservoirs was proposed. The sizes of pore and throat were randomly created according to the truncated Weibull distribution. The validity of the model was verified by fitting with the relative permeability curve of real core. The shape factor, porosity and diversion efficiency etc. parameters are calculated, which provides basic data for the simulation process. Application of constructing the network model, the process of saturated oil and water displacing oil are simulated, the effect of pore structure features on relative permeability and displacement efficiency is analyzed. The result indicates that, decreasing the throat to pore ratio, increasing coordination number and enlarging the shape factor（in a certain range） can be favorable to decrease the water permeability and increase the oil permeability, so the residual oil saturation decreased and the displacement efficiency enlarged. Compared with other ideal model, this model can be a more realistic description of the flow characteristics of oil-water two-phase.

关 键 词：水湿储层 网络模拟 孔隙特性参数 相对渗透率 驱替效率 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]