水平井蒸汽吞吐三维静态温度分布计算模型

三维静态温度分布的计算是依据稠油油藏导热特性,结合井温测井资料及水平井筒微元导热机理分析,并合理假设油藏条件,建立油层三维导热柱状温度分布模型,采用差分方程径向与轴向先分离再结合的方法进行整合,再使用不完全LU分解和ORTHOMIN加速方法对数学模型进行求解。利用该模型分析稠油热采水平井三维导热机理,计算热采水平井焖井地层网格的温度分布差异,计算水平井蒸汽吞吐静态三维温度场,为最终优选注采参数及提高最终采收率提供依据。

Calculation model of three-dimensional static temperature profile for steam huff and puff of horizontal well

The calculation of three-dimensional static temperature profile is based on the thermal conductivity characteristics of heavy oil reservoir and combined with the temperature logging data and the analysis of infinitesimal length thermal conductivity mechanism in horizontal wellbore.Through reasonably assuming the reservoir conditions,this paper established the temperature profile model of three-dimensional thermal conductivity and used the method of firstly separating differential equation into radial and axial and then integrating.The mathematical model can be solved by using the incomplete LU solution and the accelerated method of ORTHOMIN.By the use of the mathematical model,three-dimensional thermal conductivity mechanism of heavy oil and thermal recovery horizontal well were analyzed.The difference of temperature profile in thermal recovery horizontal wells and the static three-dimensional temperature field for steam huff and puff of horizontal well were calculated,which can provide a basis for optimizing injection and production parameters and improving EOR.