摘要
井筒参数计算对于海上多元热流体热采效果至关重要。利用WellFlo软件,建立了稠油油田单井的实际井筒参数计算模型,分析了不同多元热流体组分、外部传热环境、管流方式对井筒参数的影响,对比了计算值与实测值的差别。结果表明：多元热流体中气体组分增加,特别是N2组分,使井底压力明显降低,井底温度则变化较小;外部传热环境随季节变化明显,影响井底温度约0.5~5℃,对井底压力影响甚微;管柱传热性能、管流方式对井筒参数影响较大,隔热油管导热系数最低,井底温度高,生产套管比油管内径大,井底压力高。WellFlo软件压力预测误差为0.83%,温度预测误差为3.09%,预测精度较高,说明该软件适用于海上多元热流体热采井筒参数计算,能够为注热方案设计提供理论支持。
The calculation of wellbore parameters is very important for the multi- component thermal recovery on offshore oilfield. The calculation model of the actual wellbore parameters for A-23 well in a heavy oil oilfield of Bohai is established by using WellFlo software. The influence of thermal fluid components, external heat transfer environment and pipe flow modes on the wellbore parameters is analyzed, and the difference between calculated value and measured value is compared. The results show that the gas components in multi-component thermal fluid increase,especially the nitrogen component, the bottom hole pressure is obviously reduced, the bottom hole temperature has little change; the external heat transfer environment has an obvious change with seasons, which cause the bottom hole temperature changes 0.5~5 ℃ and bottom hole pressure changes slightly; the heat transfer performance of string and injection manner have a significant influence on wellbore parameters, the bottom hole temperature is higher by using insulated tubing because thermal conductivity is lower, and the bottom hole pressure is higher by injecting from production casing because inner diameter is bigger. The pressure prediction error of WellFlo software is 0.83%, the temperature prediction error is 3.09%, and the prediction accuracy is higher, which indicates that the software is suitable for the wellbore parameters calculation of multi- component thermal recovery on offshore oilfield, and can provide theoretical support for the design of the thermal injection scheme.
出处
《石油石化节能》
2016年第1期15-17,9,共3页
Energy Conservation in Petroleum & PetroChemical Industry
关键词
井筒参数
WellFlo软件
多元热流体
热采
wellbore parameters
WellFlo
multi-component thermal fluid
thermal recovery
