石油与天然气地质 ›› 1997, Vol. 18 ›› Issue (3): 221-223.doi: 10.11743/ogg19970310

• 论文 • 上一篇    下一篇

注水开发并非安塞油田长6油层低采收率的主要原因

朱玉双, 孔令荣, 曲志浩, 孙卫, 刘保军   

  1. 西北大学, 陕西西安 710069
  • 收稿日期:1997-03-24 出版日期:1997-09-25 发布日期:2012-01-18

WATERFLOODING IS NOT THE MAIN CAUSE OF LOW RECOVERY EFFICIENCY OF CHANG-6 RESERVOIR IN ANSAI OILFIELD

Zhu Yushuang, Kong Lingrong, Qiu Zhihao, Sun Wei, Liu Baojun   

  1. Northwest University, Xian, Shaanxi
  • Received:1997-03-24 Online:1997-09-25 Published:2012-01-18

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摘要：

安塞油田是一特低渗油田,长6油层组是其主力油层组,开采之初即进行了注水开发。从1986年至1996年,长6油层地层温度下降了2.18～4.11℃,原油粘度增加了0.094～0.177mPa·s.模拟实验结果表明:长6油层注水开发后,原油粘度最大限度(地温从50℃降至20℃)不会增加到3.4mPa·s,因此,注水开发对长6油层采收率的影响甚微。

关键词: 注水开发, 模拟实验, 驱油效率, 安塞油田

Abstract:

Ansai Oilfield is a oilfield with particularly low permeablilty,Chang-6 oil reservoir is the main one.Waterflooding started in the early producing stage.The geotemperature decreased 2.18℃～4.11℃ from 1986 to 1996 AD.,and crude oil viscosity increased 0.094～0.177 mPa ·s.Simulation result indicates that the maximum viscosity would not surpass 3.4 mPa·s (when geotemparature decreases from 50℃ to 20℃)by waterflooding.It is considered that waterflooding has very little influence on Chang-6 reservoir recovery efficiency.