摘要
在对YX区块化学驱注入井进行洗井和冲砂时发现大量难以处理的高黏度含油胶体。通过测定含油胶体的黏度、pH值、含水率、含油率及其他组份的含量等,对含油胶体与地层配伍性进行分析;用氯仿对含油胶体直接去油处理以除去含油胶体表面及内部所含的原油,然后将胶体烘干并打碎成粉末,通过测定处理后的不同含油胶体粉末用量下驱油体系的黏度,分析了含油胶体再利用的可行性。研究表明:含油胶体中含水80.47%、聚丙烯酰胺7.16%、原油6.49%,还有少量的硅酸盐和有机物。处理后的含油胶体粉末可以用于驱油剂的配制。另外仅通过简单过滤后可直接回注到油藏,利用含油胶体封堵优势通道或大孔道,达到含油胶体再利用的目的。
After washing and sanding the chemical flooding injection wells in the YX block,a large number of highly viscous oil-containing colloids were found to be difficult to handle.The compatibility of the oil-containing colloid and the formation was analyzed by measuring the viscosity,pH value,water content,oil content and other components of the oil-containing colloid.The oily colloid was directly deoiled with chloroform to remove the crude oil on the surface and inside of the oily colloid,and then the colloid was dried and broken into a powder.The feasibility of reusing oil-containing colloid was analyzed by measuring the viscosity of the flooding system with different amounts of oil-containing colloid powder.The results showed that the colloids containing oil contained 80.47%water,7.16%polyacrylamide,6.49%crude oil,and a small amount of silicate and organic matter.The treated colloidal powder could be used in the preparation of oil displacement agent.In addition,through simple filtration,the oil colloid could be directly injected into the reservoir and used to block the superior channel or large pore channel,so as to achieve the purpose of oil colloid reuse.
作者
李龙
LI Long(Research Institute of Safety Engineering,SINOPEC,Qingdao,Shandong 266100,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2020年第3期522-524,535,共4页
Oilfield Chemistry
