考虑温度影响的压后压力降落分析  

A Model for Pressure Decline Analysis under the Condition of the Effect for Temperature

作　　者：杨泽超[1] 王兴文[2] 王兵[3] 

机构地区：[1]西南石油局油气测试中心压裂队 [2]西南石油学院研究生院 [3]西南石油学院计算机科学院

出　　处：《断块油气田》2005年第3期47-49,共3页Fault-Block Oil & Gas Field

摘　　要：给出了一种模拟温度和压力动态的数学模型和它们之间的相互干扰以及小型压裂测试中压裂液压缩性的影响。模拟结果表明,小型压裂测试阶段的裂缝温度有显著的变化,比起不可压缩压裂液,可压缩流体的压力更高,下降速度更慢。如果流体是可压缩的,则通过Nolte压力降落分析方法计算的滤失系数偏小。此外研究还表明,采用关井阶段后期压力数据计算的滤失系数误差较小。This paper present a mathematical model for simulation temperature and pressure,including the mutual interference between temperature and pressure,and the effect for compressibility of fracturing fluids in mini fracture. Before shut in well, fracture geometry parameters are counted with numerical solution and PKN model approximate solution; after shut in well, width of fractures are counted through simulated pressure with linear elastic theory. It is pointed through analogue result that fracture temperature changes significantly at small scale fracturing test phase,and that the pressure of compressible fluid is higher than incompressible break down agent. If the fluid is compressible,the fluid loss coefficient calculated through Nolte pressure depletion analytical procedure is small. Furthermore,it is pointed that the error of the fluid loss coefficient calculated through pressure data in shut in phase anaphase is smaller.

关 键 词：油田开发 压后压力 温度影响 水力压裂 压缩性 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]