一种提高压裂产能预测精度的方法研究

A method of improve production prediction accuracy in fracturing simulation

目前压裂模拟的方法比较多,但都难以准确的描述实际裂缝的形态。应用到定向井压裂模拟和水平井压裂纵向缝模拟时产生的误差较大,难以准确预测这两种情况的产能。通过引入PEBI(非结构化网格)网格准确描述实际的定向井和水平井轨迹以及人工裂缝的长度和宽度,计算结果的误差小,与实际井投产情况相近。采用PEBI(非结构化网格)网格模拟得出,要准确的计算定向井压裂的产能,井筒和裂缝的参数必须与实际情况相近。同时对于水平井当渗透率较高时(10×10-3μm2),压裂纵向裂缝优势明显。

The fracturing simulation methods are many, but are difficult to accurately describe the shape of the actual crack.Applied to the simulation of directional well fracturing and horizontal well fracturing vertical seam simulation,the error,it is difficult to accurately predict the capacity of these two cases. Accurate description of the directional and horizontal wells trajectory and the length and width of the fracture through the introduction of PEBI（unstructured）grid calculation error, the situation is similar to the actual well production.Using PEBI grid simulation derived to accurately calculate the parameters of the capacity of the directional well fracturing,wellbore and cracks must be similar to the actual situation.The obvious advantages of horizontal wells when the penetration rate is higher（10×10^-3μm^2）,vertical fracturing cracks.