학술논문
低渗透油藏CO2驱技术对油藏岩石和原油的适应性研究 / Adaptability Research of CO2 Drive Technology to Reservoir Rocks and Crude Oil in Low Permeability Reservoirs
Document Type
Academic Journal
Author
Source
化工管理 / Chemical Enterprise Management. (3):72-75
Subject
Language
Chinese
ISSN
1008-4800
Abstract
文章针对CO2 驱过程中对油藏的适应性以及驱替效果的问题,研究在驱油过程中原油及岩石的性质变化,并探究岩石的孔隙半径、渗透性、孔隙性以及原油的黏度、密度、原油组分等油藏基本参数的变化规律.调研结果表明,随着CO2 注入量的增加,岩石的孔隙半径、渗透率增大、不变或减小,亲油性增强.随着温度以及作用压力增加,原油的密度降低;在温度一定时,随着作用压力的增加,原油的黏度会先减小后增加最后趋于稳定,C30+的含量会降低;在作用压力一定时,随着温度的增加,原油的黏度会降低,C30+的含量降低幅度不明显.
To address the issue of reservoir adaptation and replacement effect during CO2 drive,this paper studies the changes of crude oil and rock properties during the drive process,and investigate the change rule of reservoir basic parameters such as pore radius,permeability and porosity of rocks,as well as viscosity,density and crude oil components of crude oil.The investigation results show that with the increase of CO2 injection,the pore radius and permeability of the rock increase,remain unchanged or decrease,and the lipophilicity increases.With the increase of temperature as well as action pressure,the density of crude oil decreases.At a certain temperature,with the increase of action pressure,the viscosity of crude oil will first decrease,then increase and finally stabilize,and the content of C30+ will decrease.At a certain action pressure,with the increase of temperature,the viscosity of crude oil will decrease and the content of C30+ will decrease unconspicuous.
To address the issue of reservoir adaptation and replacement effect during CO2 drive,this paper studies the changes of crude oil and rock properties during the drive process,and investigate the change rule of reservoir basic parameters such as pore radius,permeability and porosity of rocks,as well as viscosity,density and crude oil components of crude oil.The investigation results show that with the increase of CO2 injection,the pore radius and permeability of the rock increase,remain unchanged or decrease,and the lipophilicity increases.With the increase of temperature as well as action pressure,the density of crude oil decreases.At a certain temperature,with the increase of action pressure,the viscosity of crude oil will first decrease,then increase and finally stabilize,and the content of C30+ will decrease.At a certain action pressure,with the increase of temperature,the viscosity of crude oil will decrease and the content of C30+ will decrease unconspicuous.