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关井脉冲试井影响油田生产,需要在不关闭观测井的情况下进行脉冲试井。在单相流体在均质、各向同性孔隙介质中流动等假设下,建立了不关井干扰测试的物理模型,并用扩散方程进行数学描述,得到拉氏空间任意点、任意时间的不关井观测井无因次压力表达式及其压力解析解,应用叠加原理求得井底无因次脉冲激动压力解。不关井脉冲试井的压力响应曲线有波峰和波谷特征,压力响应与产量变化之间有时滞,具有关井脉冲试井压力响应的一般趋势和特征。编制了不关井脉冲试井软件,对大庆油区2口井进行了不关井脉冲试井的设计和分析计算,结果表明不关井脉冲试井是可行的,应用条件是测试井距应控制在300m以内,脉冲井与观测井的流量之比值应大于0.3。图3参4(陈志宏摘)
Shut-in pulse test wells affect oilfield production and require pulse well testing without shutting down the observation well. Under the assumption that a single-phase fluid flows in a homogeneous and isotropic porous medium, a physical model of the non-shut-in disturbance test is established, and the diffusion model is used to describe the physical model. Any Lagrangian space can be obtained at any point, The dimensionless pressure expression and its analytical solution of pressure in observation well are obtained by using the principle of superposition to obtain the solution of pressureless pulse excited pressure at the bottom of the well. The pressure response curve of well test without pulse well has the characteristics of crest and trough. There is a time lag between the pressure response and the change of production, which has the general trend and characteristics of well test pressure response. The software of non-shut-in pulse well test was compiled. The design and analysis of two shut-in wells in Daqing Oil Region were carried out. The results show that it is feasible to do well shut-in pulse well test. The application conditions are: Control within 300m, the ratio of pulse well and observation well flow should be greater than 0.3. Figure 3 Senate 4 (Chen Zhihong pick)