Some petroleum wells that are no longer productive still have heat in their formation rocks. Those heat can be extracted and utilized by injecting working fluid into the wellbore. The current study’s objective was to create a 2D numerical calculation program for transient flow temperatures inside the well then it was used to calculate the temperature distribution in oil and gas fields in the Arun field and BK Area. The injected fluids were modeled as a double-pipe heat exchanger. Heat transfer processes inside the wellbore were convection in the inner pipe and the annulus and conduction in the pipe walls and rock formations. The computational calculation used a finite difference method. The computation results were then compared with calculations from the literature. After being validated, the program was used to calculate the Arun field and BK Area temperature distributions. This study found that compared with the reference literature, the current results had a similar optimum temperature range of 130C-160C but had different profiles shape with an average deviation of 12%. In the Arun fields, simulation results indicated that the field could reach temperatures between 90C-120C and was classified as a medium-temperature geothermal source. BK Area could reach optimum temperatures between 50C-80C and be classified as the low-temperature geothermal.

一些不再生产的油井在其地层岩石中仍有热量。这些热量可以通过将工作流体注入井筒中来提取和利用。当前研究的目的是创建一个二维数值计算程序，用于计算井内瞬态流动温度，然后将其用于计算 Arun 油田和 BK 地区油气田的温度分布。注入的流体被模拟为双管换热器。井筒内的传热过程是内管和环空中的对流以及管壁和岩层中的传导。计算计算使用有限差分法。然后将计算结果与文献中的计算进行比较。确认后，该程序用于计算 Arun 场和 BK 区温度分布。本研究发现，与参考文献相比，目前的结果具有相似的最佳温度范围，130C-160C，但具有不同的剖面形状，平均偏差为12%。在 Arun 油田，模拟结果表明该油田的温度可以达到 90C-120C 之间，并被归类为中温地热源。BK区可达到50C-80C之间的最佳温度，属于低温地热。模拟结果表明，该场温度可达90-120℃，属于中温地热源。BK区可达到50C-80C之间的最佳温度，属于低温地热。模拟结果表明，该场温度可达90-120℃，属于中温地热源。BK区可达到50C-80C之间的最佳温度，属于低温地热。