Project Full Name：Important Technologies and Large-scale Applications of Complex Oil Reservoirs Based on the CO₂ Injection under Dual Carbon Strategy

Company：China University of Petroleum (Beijing), Southwest Petroleum University

Awarded：Environmental Protection, Energy Saving & Emission  Reduction Technology

Standeard:  International  Advanced Level

Projec Number：ECF-2023-SEP-1003

Principal Accomplishers： Chen Hao, Liu Xiliang, Meng Zhan, Yang Shenglai, Qiu Ping, Cheng Weiming, Zuo Mingsheng

Important Technologies and Large-scale Applications of Complex Oil Reservoirs Based on the CO₂ Injection under Dual Carbon Strategy

Key Innovation Points：

A phase parameter characterization model that characterizes the phase equilibrium dynamic evolution behavior of complex fluid systems suitable for the characteristics of terrestrial oil reservoirs in China has been developed, elucidating the thermal/dynamic mechanisms of reservoir fluids;

We have established an intelligent discrimination model for the universality of CO₂ crude oil system engineering, and proposed a gas medium collaborative intelligent mixing control method and a chemical self-assembly assisted mixing reduction method to form a new generation of gas drive technology that promotes mixing, expands wave coverage, is low-cost, and can be implemented;

We have invented a multi-scale testing method for the diffusion and transmission behavior of CO₂ containing mixed fluids in porous media, solving the problem of dynamic characterization of diffusion and transmission behavior of CO₂ containing mixed fluids, and supporting the construction of four major CCUS demonstration bases.

Main Application and Technical Principal： 

A phase parameter characterization model that characterizes the phase equilibrium dynamic evolution behavior of complex fluid systems suitable for the characteristics of terrestrial oil reservoirs in China has been developed, elucidating the thermal/dynamic mechanisms of reservoir fluids;

We have established an intelligent discrimination model for the universality of CO₂ crude oil system engineering, and proposed a gas medium collaborative intelligent mixing control method and a chemical self-assembly assisted mixing reduction method to form a new generation of gas drive technology that promotes mixing, expands wave coverage, is low-cost, and can be implemented;

We have invented a multi-scale testing method for the diffusion and transmission behavior of CO₂ containing mixed fluids in porous media, solving the problem of dynamic characterization of diffusion and transmission behavior of CO₂ containing mixed fluids, and supporting the construction of four major CCUS demonstration bases.

Technology Application： 

Project team members have published three Chinese and English monographs

This project is being conducted in the first district of the Chinese Academy of Sciences/TOP Chemical Engineering Journal (IF: 16.744), Environmental Science&Technology (IF: 11.357), Energy Conversion and Management (IF: 11.533), Applied Energy (IF: 11.466), Energy (IF: 8.857), Fuel (IF: 8.035), SPE Journal More than 120 articles have been published in high-level journals such as Journal of Petroleum Science and Engineering.

15 authorized invention patents, 5 registered software copyrights, and 5 declared invention patents

During the project implementation process, we actively maintained close cooperation with international high-level teams and were cited by multiple academicians from the American Academy of Sciences and the European Academy of Sciences, as well as industry experts at home and abroad

The project achievements have been successively applied to the field development of typical oil reservoirs in China's Songliao Basin, Bohai Bay Basin, Ordos Basin, the Junggar Basin and other typical oil reservoirs, supporting all four major engineering demonstration bases of PetroChina. The cumulative output of crude oil has increased by 680000 tons, carbon storage has reached nearly 2 million tons, and direct economic benefits have reached 1.58 billion yuan, making important contributions to CCUS-EOR and geological storage of oil reservoirs in China.