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注水开发并非安塞油田长油层低采收率的主要原因
石油与天然气地质
1997年 18卷 第No.3期
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Title
WATERFLOODING IS NOT THE MAIN CAUSE OF LOW RECOVERY EFFICIENCY OF CHANG-6 RESERVOIR IN ANSAI OILFIELD
Authors
Zhu Yushuang
Kong Lingrong
Qiu Zhihao
Sun Wei
Liu Baojun
摘要
安塞油田是一特低渗油田,长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,注水开发对长油层采收率的影响甚微。
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.
关键词：
注水开发;
模拟实验;
驱油效率;
安塞油田;
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