公开(公告)号：US11506651B2

公开(公告)日：2022-11-22

申请号：US16918468

申请日：2020-07-01

Applicant: Peking University

Inventor： Jianbin Huang ,  Cheng Ma ,  Kaerdun Liu ,  Yun Yan ,  Zhiyang Zhu

IPC: G01N33/28 ,  E21B49/00 ,  G01N13/02 ,  E21B43/16

Abstract: Provided in the present invention a method for evaluating the mixing effect of a CO2 oil-displacing and mixing agent, characterized in measuring the volume expansion of a CO2-oil interface when pressure is gradually increased, drawing a mixed-phase percentage-pressure curve (δ-P curve), and evaluating the mixing effect of the CO2 oil-displacing and mixing agent by means of comparing the characteristics of the δ-P curve. Further provided in the present invention is a method for initially screening a CO2 oil-displacing and mixing agent.