摘要
为揭示注水水质对储层的伤害情况,针对克拉玛依油田清污混注运行中水体不配伍和水质达标率低的问题,开展了清污混注的水体配伍性、水质对岩心的伤害、悬浮颗粒或乳化油对储层堵塞机理及注水水质指标研究。结果表明:克拉玛依油田污水与清水、注入水与地层水均存在一定程度的不配伍,但失钙(镁)率都在30%以下。清污混注增加了注水对岩心伤害的程度,且清水占比越大伤害越重。注入水中悬浮颗粒和乳化油浓度越高,岩心的渗透率保留率越低,对岩心的伤害程度也越大。因此,克拉玛依油田最大的清水配注量应是恰好满足配注所需的最低清水量,回注水的推荐指标为悬浮颗粒质量浓度≤5mg/L、乳化油质量浓度≤20mg/L。
To reveal the reservoir damage of the injected water,this paper aiming at the incompatibility and lower water qualification rate at mixed injection in Karamay Oilfield,discussed the compatibility of swage and eau douce at mixed injection,core damage by the ineligible injection-water,plugging mechanism to the reservoir by suspended particles or emulsified oil,and injection water quality indicators.The result indicates that the sewage has a little incompatibility with eau douce and the injected water also has the same problem with the formation water,but fortunately the loss rate of calcium（magnesium）is all below 30%.Mixed injection will result in core damage,and the more proportion of eau douce,the higher the concentration of suspended particles and emulsified oil,the greater the degree of core damage.Therefore,the largest quantity of injection eau douce allocation should be the minimum required injection allocation in Karamay Oilfield.The recommended index of injection water quality is that the content of suspended particles is less than 5mg/L,and emulsified oil content is no more than 20mg/L.
作者
刘清云
黄卫红
刘磊
史建英
罗跃
Liu Qingyun Huang Weihong Liu Lei Shi Jianying Luo Yue(Faculty of Chemistry and Environmental Engineering, Yangtze University, Jingzhou Huhei 434023, China The First Oil Extraction Plant, PetroChina Xinjiang Oilfield Company, Karamay Xinjiang 834000, China Department of Production Optimization, China Oilfield Services Limited, Tianjin 300452, China Faculty of Earth Resources, China University of Geosciences（Wuhan）, Wuhan 430074, China)
出处
《地质科技情报》
CSCD
北大核心
2017年第4期210-214,共5页
Geological Science and Technology Information
基金
中国石油新疆油田分公司科研攻关项目"克拉玛依油田注水水质配伍性研究"
关键词
注入水
储层伤害
配伍性
悬浮颗粒
乳化油
渗透率
injected water
reservoir damage
compatibility
suspended particle
emulsified oil
permeability
