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方法 在大庆朝阳沟低渗透油层水力压裂矿场资料基础上 ,运用珀金—克恩公式、卡特公式以及本文提出的压裂强度的概念 ,得到了该油田一、二次压裂缝长、缝宽的回归方程。目的 应用该回归方程对朝阳沟油田一、二次压裂缝长、缝宽及裂缝导流能力进行评价。结果 在压裂强度较大时 ,二次压裂缝宽增加较大 ;而在压裂强度较小时 ,缝长增加较大 ;二次压裂裂缝导流能力增加较大。结论 该方法对二次压裂评价和工艺设计以及提高压裂效果具有重要意义。
Methods Based on the data of hydraulic fracturing in the low permeable reservoirs of Chaoyanggou, Daqing, the Perkins-Kern formula, Carter’s formula and the concept of fracturing strength proposed in this paper were used to obtain the primary and secondary fractures’ Wide regression equation. Objective To evaluate the primary and secondary fracture length, fracture width and fracture conductivity of the Chaoyanggou oilfield by using the regression equation. The result shows that when the fracturing strength is large, the secondary fracturing width increases greatly. When the fracturing strength is small, the length of the fracturing increases greatly. The secondary fracturing flow conductivity increases greatly. Conclusion This method is of great significance to the evaluation of secondary fracturing and the process design as well as the improvement of fracturing effect.