端部脱砂压裂技术新模型

A New Model for Tip Screen out Fracturing

在分析端部脱砂压裂的机理及技术特点的基础上,针对中高渗透地层建立了一套能准确反映压裂液真实流动情况的三维滤失模型,并针对该技术模拟精度高于常规压裂的要求,建立了一套考虑缝高压降的裂缝三维延伸模型,最后提出了完整的端部脱砂压裂设计过程。

On the basis of analyzing the mechanisms and technical features of tip screen out fracturing, this paper develops a series of 3D filtration model to describe the real flow of fracturing fluids in medium-high permeable formations, and a set of 3D spreading model considering fractures with high pressure drop in terms of its higher simulating accuracy than one of normal fracturing process. Finally, a complete tip screen out fracturing design program is presented in this paper.