渤海稠油油田井筒电加热技术可行性分析

文中分析了原油黏度的主要影响因素,统计了渤海海域主要稠油油田的流体性质、黏温试验数据、油藏压力、温度及生产数据。经过深入分析,总结出了渤海海域稠油油田的原油黏温特性及拐点温度、含水分布等规律。随后,按照这一分布规律,同时考虑井筒电加热技术的特性,选取S油田某稠油生产井,模拟了井筒电加热的效果,并对相应的能耗及电潜泵系统的运行参数进行了分析。结果发现,采用电加热技术有利于电潜泵机组的运行,电潜泵的排量和效率随着加热温度的升高相应提高,而功率则随之减小,可以有效地降低平台的用电负荷。在此基础上,对渤海海域6个主要稠油油田进行了井筒电加热模拟,并根据模拟结果深入分析了井筒电加热技术在这些油田的适用性。

Feasibility analysis on electric heating of wellbore in heavy oilfield of Bohai

This paper firstly analyzes the influential factors of crude oil viscosity and counts the fluid property, viscosity-temperature test data, reservoir pressure and temperature, production data in main heavy oilfiehts of Bohai waters. Tire regular pattern of viscosity-temperature characteristics, flex point temperature and water cut distribution are summarized through deep analysis. Then, according to the regular pattern and the consideration of the features of electric heating of wellbore , the effect of electric heating of wellbnre is simulated, taking one production well of heavy oil in S Oilfield as an example. And the paper analyzes the operation parameters of relevant energy consumption and electric submersible pump system. It is found that the application of electric heating is beneficial to the operatinn of electric submersible pump unit, that the discharge rate and efficiency are increased with the rising of heating temperature, while the power is deceased, which can reduce the electricity load of platfnrm effectively. Further, the electric heating simulation of wellbore is carried out for six heavy oilfields in Bohai waters. According to the simulation result, the feasibility of electric heating technology is also analyzed in these oilfields.