海上射流泵井井筒温度场模型

A borehole temperature field model for offshore wells equipped with jet pump

稠油的开采方式主要是降低原油黏度,增加其流动性。由于原油的黏度对于温度极其敏感,热采开采方式备受关注。以渤海油田A区的实验井为例,介绍了射流泵井以多元热流体为动力液在同心管井筒的传热特点,研究了热流体在井筒各部分的传热过程,建立了综合传热系数的计算方法以及井筒温度场模型,根据相应的温度场求解流程,编制软件,并以实际射流泵生产井为例进行计算。实际测量结果与软件计算结果存在8.87%的误差,可以为后续海上稠油油田射流泵井工况诊断和参数优化提供保障。

The exploitation mode of heavy oil is mainly to decrease the viscosity of crude oil and increase its fluidity. The viscosity of crude oil is extremely sensitive to temperature, so the thermal recovery modes are much concerned. In this paper, the experimental well in Block A of Bohai Oilfield was taken as an example. The characteristics of heat transfer in the concentric borehole of the well equipped with jet pump by taking the multi-component thermal fluid as the power fluid were introduced. Then, the heat transfer process of thermal fluid in each part of the borehole was investigated, and the method for calculating the combined heat transfer coefficient was developed. In addition, the borehole temperature field model was established, and the software was programmed according to the corresponding temperature field solution process. Finally, the calculation was carried out with one actual production well equipped with jet pump as the example. It is shown that the error between the actual measurement value and the calculation result is 8.87%. It is proved that the research results can provide the guarantee for the working condition diagnosis and parameter optimization of wells equipped with jet pump in offshore heavy oil fields.