海上稠油热采井井筒温度场模型研究及应用

Research and Application of Wellbore Temperature Field Models for Thermal Recovery Well in Offshore Heavy Oilfield

海上稠油油田的开发越来越受到人们的重视,多元热流体吞吐是一项集热采、烟道气驱等采油机理于一体的新型、高效稠油开采技术,该技术在渤海油田进行了现场试验并取得了成功。以渤海M油田多元热流体吞吐实验井为例,介绍了海上稠油油田多元热流体吞吐工艺的特点;研究了热流体吞吐井各传热环节及井筒温度场分布模型,建立了井筒综合传热系数的计算方法,并以海上实际热流体吞吐井为例进行了计算。在此基础上,模拟了隔热油管导热系数、下入深度、多元热流体组成等工艺参数对热采效果的影响,并得到了一些有益的结论,为海上稠油油田规模化热力采油工艺方案优化设计起到指导性作用。

With the development of oil economy, the exploitation of offshore heavy oil is getting more and more attention. Multiple thermal fluid huff and puff is an efficient and economic heavy oil production technology, which has been applied with success in Bohai Oilfield. In this paper, based on the experimental wells ofM Oilfield, the technology characteristics and the production effect are introduced; wellbore temperature distribution model and complex heat transfer coefficient calculation method are studied. In addition, the optimum design method for several important process parameters of the multiple thermal fluid huff and puff are presented such as insulated tubing heat conduction coefficient, insulated tubing setting depth and multiple thermal fluid compositions. Through the study, some useful conclusions of multiple thermal fluid huff and puff have been acquired, which could be used to guide the thermal recovery plan optimization design of offshore.