摘要
为探索低渗透油藏注水降压增注技术,提高低渗透油田原油采收率,针对低渗透油田注水压力高,注入效果差等问题,研制了一种以SiO_(2)晶体为核心的纳米聚硅材料,通过室内实验模拟,对该纳米聚硅材料在低渗透油藏注水井中的降压增注能力进行了研究。结果表明,纳米聚硅乳液对注入储层能够起到润湿反转作用,能有效地降低储层中流体的流动阻力,同时对中低渗岩样(气测渗透率1.52×10^(-3)~4.70×10^(-3)μm^(2))具有较好的降压效果,压降变化为18.2%~36.5%,平均降压幅度为27.7%。该结论对于纳米聚硅材料在油田现场中的选井应用有着重要的指导意义。
In order to explore the low-permeability reservoir water-proof increase,improve the crude oil recovery rate of low osmotic oil fields,which has developed a nano-polysilicon-based material-based nano-silicon material according to the low permeable oil field.Through the simulation of the indoor experiment,the antihypertensive increase in the nano-polysilicon material in the low permeability reservoir is studied,and the results show that the nano-polysilicon emulsion can function as a wetting in the injecting reservoir.It can effectively reduce the flow resistance of fluid in the reservoir,while having a better step-down effect on the medium,and for medium and low permeability rock samples(gas detection permeability from 1.52×10^(-3) to 4.70×10^(-3)μm^(2)),the pressure drop ranges from 18.2%to 36.5%,the average buck is 27.7%.This conclusion has an important guiding significance for the selection of nano-polysilicon materials in the field site.
作者
黄贵花
杨文博
贾红娟
HUANG Guihua;YANG Wenbo;JIA Hongjuan(Exploration and Development Technology Research Institute, Yanchang Oil Field Co. , Ltd. ,Shaanxi Yan’an 716001, China)
出处
《非常规油气》
2022年第2期79-84,共6页
Unconventional Oil & Gas
基金
陕西省科技统筹创新项目“延长难采储量有效动用开发技术研究”(2016KTCL01-12)。
关键词
纳米聚硅材料
渗透率
注入压力
润湿性
孔隙体积
nano-polysilicon material
permeability
injection pressure
wettability
pore volume
