【作者】 石颖；

【导师】 宋延杰；

【作者基本信息】 大庆石油学院 ， 地球探测与信息技术， 2004， 硕士

【摘要】 本文针对油田开发中油井的生产实际情况，基于多孔介质流动力学和多孔介质传热学理论，建立了油井井筒及其周围地层的温度场模型。当油井生产时，将井筒内传热看成竖直圆管中连续介质的传导和对流换热，将地层中产层部分的传热看成多孔介质中的传导和对流换热，将地层中围岩部分的传热看成多孔介质中的热传导；当油井停产时，由于井筒和产层都没有了流体的流动，所以将井筒内的传热看成竖直圆管中连续介质的传导，将地层中的传热看成多孔介质中的传导。 对大多数生产井多层产液的情况，并考虑到井筒内液体在上升过程中的速度变化和流量变化，把质量、动量和能量守恒方程耦合联立求解。根据生产井的实际情况，构建起外边界条件以及井筒与围岩、井筒与产层、围岩与产层之间的耦合内边界条件，采用交替方向半隐式有限差分方法(ADI方法)求解所建立的井下温度场模型。 本文模拟了产液量、生产时间、停产时间、地层参数、地温梯度、层厚及井筒半径等不同条件下的井下温度场分布，并对模拟结果进行了分析和讨论。通过对大庆采油五厂K9-D4-332井的温度剖面进行模拟，并与实测井温曲线对比，取得了良好的应用效果。更多还原

【Abstract】 Based on the theory of porous medium flow and the porous medium heat transfer, the temperature field models of the welibore and adjacent formation have been constructed for production wells. While wells are producing, heat transfer in welibore is considered as heat conduction and convection in continuous media in vertical tube, heat transfer in production zones is considered as heat conduction and convection in porous media, heat transfer in adjacent rocks is considered as heat conduction in porous media. While wells stop producing, because of stopping flowing in welibore and production zones, heat transfer in welibore is considered as heat conduction in continuous media in vertical tube, and heat transfer in formation is considered as heat conduction in porous media.For the actual situation of multiplayer production in most oil wells, velocity and flow change are considered in the model while fluid moves up the well, and conservation equation including continuous equation, momentum equation and energy equation are solved together. According to actual situation of production wells, external boundary conditions and coupled inner boundary conditions between welibore and adjacent rocks, welibore and production zones, adjacent rocks and production zones are constructed, and an alternate direction implicit finite difference algorithm(ADI) is used to solve temperature models.Downhole temperature profiles have been simulated under different conditions of fluid output, production time, off production time, formation parameters, geothermal gradient, bed thickness, welibore radius and so on, and simulation results are analyzed and discussed. Though simulating the temperature profile of X9-D4-332 in Daqing oil field, and comparing it with temperature log, a good result is achieved.更多还原