温度试井模型及其应用

试井是人们测取油气井不同工作制度下井底压力和温度的过程。但在常规的试井中,温度被假定为常数。但在实际测试中,温度是变化的。针对此情况,在能量守恒的基础上,根据傅里叶定律推导出产层处温度与地层热力学性质的关系,绘制了温度理论图版。通过选取不同的热力学参数值,得到了影响温度试井的热力学敏感性参数。在此基础上,根据建立的温度试井模型,反求有代表性的热力学参数。

non-isothermal well test model and application

The well test is a process that the bottom hole pressure and temperature will be measured in different work system.But in the conventional test, temperature was assumed to be constant.On fact, the temperature distributions in the reservoir and wellbore have been non-isothermal.According to Law of Energy conservation and Fourier law,deducing the relationship between formation temperature and the thermodynamic parameters and establishing a representative model for the temperature distribution in the reservoir, through choosing different thermodynamical parameters, the following parameters were tested for sensitivity of the solution to their values:the porosity of the formation, Joule-Thomson coefficient of the fluids , thermal conductivity of rock and fluid, permeability, thermal diffusivity length, in accordance with established non-isothermal well test model,some representative thermodynamic parameters have been obtained accurately.