西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

稠油油藏双水平井SAGD 生产电预热模型

魏绍蕾1 *,程林松2,张辉登2,黄世军2   

  1. 1. 中国石化石油勘探开发研究院,北京海淀100083
    2. 中国石油大学(北京)石油工程学院,北京昌平102249
  • 出版日期:2016-02-01 发布日期:2016-02-01
  • 通讯作者: 魏绍蕾,E-mail:leisurewin@163.com
  • 基金资助:

    国家科技重大专项(2011ZX05024 005 006)。

Analytical Solution for Double-horizontal-well SAGD Electric#br# Preheating Model of Heavy Oil Reservoirs

WEI Shaolei1*, Cheng Linsong2, ZHANG Huideng2, HUANG Shijun2   

  1. 1. Petroleum Exploration and Production Research Institute,SINOPEC,Haidian,Beijing 100083,China
    2. College of Petroleum Engineering,China University of Petroleum(Beijing),Changping,Beijing 102249,China
  • Online:2016-02-01 Published:2016-02-01

摘要:

双水平井SAGD 技术的预热方式有两种:蒸汽循环预热和电加热。与蒸汽循环预热方法相比,地层的非均质
性对电加热方法影响较小。电加热能够比较均匀地预热近井周围地层,降低稠油黏度提高流动能力,保证蒸汽顺利注
入地层。建立了双水平井SAGD 电预热模型,并对模型进行求解。针对SAGD 独特的布井方式,利用叠加原理处理
多井干扰问题;并且对变功率注入的情况进行了分析。利用该模型可以求得任意时刻地层中各点温度分布;同时,给
定加热功率和原油被加热的温度可以确定预热的时间。研究结果表明,在总的注入热量保持不变的情况下,预热过程
中逐步增加热功率可以获得最佳的预热效果。

关键词: SAGD 生产, 电加热预热, 叠加原理, 多井干扰, 变功率

Abstract:

There are two preheating methods for steam assisted gravity drainage(SAGD),namely the steam circulation method
and electric preheating method. Compared with the steam circulation method,reservoir heterogeneity has a smaller influence
on the electric preheating method and the formation nearby horizontal wells can be heated evenly. Therefore,the viscosity
of oil is reduced and flowing capacity is improved. A mathematical model for SAGD electric preheating method is built and
solved analytically. According to the special well pattern,the superposition principle is employed to deal with the multi-well
interference problem. Meanwhile,variable electric power injection situation is handled. Temperature distribution at different
time is obtained with the new model. The preheating time can be predicted at a given electric power injection mode. The
research shows that in the case of constant total electric energy,increasing the electric power gradually in preheating is the best
injection method and the temperature between wells rises higher than any other injection methods.

Key words: SAGD production, electric pre-heating, superposition principle, multi-well interference, variable electric power
injection

中图分类号: