旅大10-1油田含聚污水回注对储层损害研究  

The Damage of Polymer-Flooding Wastewater Injection into the Reservoir of LD10-1 Oil Fields

作　　者：唐洪明[1,2] 黎菁[1] 何保生[3] 李玉光 王珊 赵峰[1] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500 [3]中海石油研究总院,北京100027

出　　处：《油田化学》2011年第2期181-185,205,共6页Oilfield Chemistry

基　　金：国家油气重大专项"多枝导流适度出砂开采过程中储层保护技术研究"(项目编号2008ZX05024-003-04);"海上油田注入水综合治理技术研究"(项目编号2008ZX05024-002-11)

摘　　要：在分析旅大10-1油田储层基本地质特征及开发现状的基础上,结合现场注水井动态特征和岩心驱替实验结果,用X射-线衍射、扫描电镜、能谱分析方法综合分析造成储层损害的因素。结果表明,含聚合物污水中悬浮物含量高、粒径大,主要成分为聚合物絮凝产生的有机物絮团,其次为CaCO3垢颗粒和含铁腐蚀产物等。有机物絮团包裹悬浮物颗粒使得颗粒粒径增大。污水中乳化油滴含量严重超标,产出聚合物水力学体积较大,形成塑性颗粒加重孔喉的堵塞。混合污水对储层损害实验表明,含聚污水和清水等体积混合时的配伍性最差,体系电解质浓度较高,使交联聚合物过分卷曲包裹碳酸钙、腐蚀颗粒等,形成粒径较大的聚集体堵塞储层孔喉,这是含聚污水比普通污水损害大的根本原因。对控制水质指标、增注措施和储层保护措施提出了一些建议。Based on the basic geological features of the reservoir in LD10-1 oilfield,and combined with the dynamic characteristics of injection wells and flooding experiments on reservoir cores,the damage factors of the reservoir were analyzed using X-ray diffraction,electron microscope scanning and energy spectrum analysis.The results showed that polymer-flooding wastewater contained a lot of suspended substances which were mainly composed of organic polymers,CaCO3 particles and iron corrosion products.Polymer flocculation packaged CaCO3 and corrosion particles into larger aggregates.In addition,the excessive amount of emulsified oil droplets and polymer formed the plastic particles which blocked pore and throat of the reservoir.The compatibility between pure water and waste water became bad when the volume ratio is 1∶1.The concentration of electrolyte was high enough to make cross-link polymer crimp and wrap calcium carbonate and corrosions,and form large aggregates blocking core and throat of the reservoir,which was the root reason that polymer-flooding wastewater had greater damage to the reservoir than the ordinary wastewater.Some suggestions on the controlling of water quality,increasing water injection and protecting reservoir were put forward.

关 键 词：含聚合物污水 回注 储层损害 储层保护 旅大10-1油田 

分 类 号：X703[环境科学与工程—环境工程]