A method for predicting the miscibility pressure of crude oil displaced by CO2 and its application
By testing crude oil density and formation temperature, and using a CO2-displaced crude oil miscibility pressure prediction model, the problems of high cost, long time consumption, and large error in existing miscibility pressure prediction technologies have been solved, achieving high-precision miscibility pressure prediction that is applicable to complex reservoirs.
CN122304669APending Publication Date: 2026-06-30CHINA PETROLEUM & CHEMICAL CORP +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2024-12-31
- Publication Date
- 2026-06-30
Smart Images
Figure CN122304669A_ABST
Abstract
This invention discloses a method for predicting the miscibility pressure of CO2-displaced crude oil and its application, relating to the field of petroleum exploration and development technology. The method includes the following steps: testing the density of crude oil; calculating the specific gravity of crude oil; and calculating the miscibility pressure of crude oil using a CO2-displaced crude oil miscibility pressure prediction model based on the specific gravity and formation temperature. This method predicts the miscibility pressure of crude oil based on its specific gravity and formation temperature, with a correlation coefficient squared between the predicted and experimental values of 0.9988, indicating accurate prediction of the miscibility pressure of CO2-displaced crude oil.
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