论文部分内容阅读
低渗透油田开发效果比初期预测效果变差的原因 :一是由于地层压力下降 ,净上覆净压力相对增加而引起渗透率降低 ;二是储集层流态由护达西渗流变为低速高阻非达西流。根据液城油田低渗透油藏实际 ,定义了技术极限井距概念 ;概括据渗流流量方程和流速方程 ,结合室内实验模型 (临界驱替压力梯度 )和现场资料 ,确定了技术极限井距计算公式 ,以濮城油田沙三上濮 67块进行试算 ,计算结果比较合理
The reason why the development effect of low-permeability oilfield is worse than the initial prediction result is that the permeability decreases due to the decrease of formation pressure and the net increase of net pressure, and the second is the change of reservoir fluid flow from the permeability of Perdana to the low velocity Resistance non-Darcy flow. According to the actual situation of low permeability reservoirs in Liushi Oilfield, the concept of technical limit well spacing is defined. Based on the seepage flow equation and flow rate equation, combined with the laboratory experimental model (critical displacement pressure gradient) and field data, the formula of technical limit well spacing , With Pucheng Oilfield Sha San Pu 67 block trial, the calculation result is more reasonable