压裂水平缝油井产能数值模拟研究

为了预测低渗透油藏中的压裂水平缝油井产能,建立了一套完善的二维单相油藏线性渗流数学模型,同时采用有限差分法对数学模型求解,把数学偏微分方程离散化,然后对该方程求解,实现对压裂油井生产动态模拟,并编制相应的模拟程序,分析了低渗透油藏水力裂缝参数对油井产能的影响。结果表明,当裂缝半长一定时,裂缝的渗透率对油井的累计产能影响较大,在产油天数一定的情况下,裂缝长度的大小对累计产液量的影响不是很大,此结果对压裂增产方案优化设计及选择具有一定的指导作用。

Study on numerical simulation of well productivity after fracturing horizontal fracure

The article introduces the method of realizing the tooth arrangement design of the PDC Bifs three - dimensional parameter by user- defined function in Pro/E, and gives particulars on the process of completing tooth arrangement structure of the three - dimensional physical model from the parameter form. The theoretical calculation result indicates that the three - dimensional tooth arrangement model of PDC Bit's with the parameter method is precise and reliable. It provides an effective approach to enhance the tooth arrangement design efficiency of the PDC Bifs and improves the comprehensive production efficiency of new PDC Bit products.