摘要
在压裂施工中由于施工排量、液体粘度及砂比的变化导致沿程摩阻和液柱重量的变化,往往致使地表压力波动较大,难以准确判断裂缝延伸情况,并使压后分析结果出现较大误差。文章介绍了如何运用压裂施工的井下压力,分析、判断裂缝延伸情况,并采用GOHFER2000全三维压裂软件进行拟合分析,获得裂缝几何参数和形态。
During fracturing, the operation displacement and the variation of liquid viscosity vs. proppant concentration will lead to the variation of both on-way friction and liquid-column weight, which result in a large variation of subsurface pressure and a difficult determination of fractures′ extension. At last, a big error is occurred for the post-fracturing analysis. This paper introduces to apply downhole pressure during fracturing to analyzing and determining fractures′ extension. It also shows the geometric parameters and shape of the fractures are achieved by a matching analysis of GOHFER 2000, a full 3D fracturing software.
出处
《天然气勘探与开发》
2007年第4期49-51,共3页
Natural Gas Exploration and Development
关键词
井下压力
压裂
拟合
压裂软件
downhole pressure, fracturing, matching, fracturing software
