高凝油抽油机井井筒压力-温度分布预测  

Prediction of wellbore pressure and temperature distribution in the pumping wells producing high pour point oil

作　　者：陈涛平[1] 张权[1] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《大庆石油学院学报》2011年第2期62-67,119,共6页Journal of Daqing Petroleum Institute

基　　金：辽河油田分公司重点科研项目(ZX09073004-1)

摘　　要：利用水力相当直径的概念,将Mukherjee-Brill气液两相管流压降计算方法拓展到抽油机井井筒压力预测中,同时考虑焦耳-汤姆逊效应及油套环空流体对流换热对井筒温度分布的影响,结合沈阳油田沈84-安12区块原油高压物性数据及其地面脱气原油黏温数据,建立预测高凝油抽油机井井筒压力-温度分布的综合数学模型.采用迭代法进行求解并编制了应用软件,进而利用现场实测井温数据对模型中较难确定的油套环空流体视换热系数进行修正,对沈采矿场5口冷抽井的井筒温度进行预测.结果表明:油套环空气柱段视换热系数取17 W/(m2.℃),液柱段取29 W/(m2.℃)较好;修正后的模型具有一定精度,相对误差不超过10%,能够有效预测高凝油抽油机井井筒压力-温度分布.Based on the concept of the considerable diameter,applying the Mukherjee-Brill method to drawdown calculation of gas-fluid biphase conduit flow to predict pressure of pumping wellbore,taking into account the Joule-Thomson coefficient and the fluid convection heat transfer of the casing annulus,banding oil PVT data of Shen84-An12 block of Shenyang oil field together,an integrated mathematical model was formulated to predict pressure and temperature distribution of wellbore multiphase fluid simultaneously in pumping wells producing high pour point oil.The model was implemented using iteration method and an application software was developed related to the model.Further,the model was revised using field measured data and a calculation example was then given.The results show that the fluid convection heat transfer factor of the casing annulus in gas column should fix 17 W/(m2·℃),and fluid column part 29 W/(m2·℃);the proposed model achieves a good performance with high accuracy,relative error within 10%,and could predict the pressure and temperature distribution of multiphase fluid excellently in the pumping wells producing high pour point oil.

关 键 词：高凝油抽油机井 气液两相管流 井筒压力分布 井筒温度分布 环空流体换热系数 

分 类 号：TE355.5[石油与天然气工程—油气田开发工程]