Unconventional reservoir injected carbon dioxide full life cycle miscible flooding- geology storage-monitoring integrated technology
Applied in Huang3 Oilfield of Jiyuan Oilfield, Changqing Oilfield Branch. Preliminary production practice has shown that since the adjustment of the self injection production well network, the Huang-3 area has adopted a drainage injection production well network for CO2 oil displacement, which has increased the recovery rate by 0.005%, accumulated 18600 tons of oil production, and injected a total of 57800 tons of CO2; After local encryption, gas injection increased the recovery rate by nearly 0.02%, and the recovery rate in each well of the injection production device increased by 0.01%. The retention coefficient and burial capacity also increase accordingly. At present, scientific research achievements have been widely applied and achieved economic benefits, contributing to the development of CO2 oil recovery and CO2 storage in China to reduce CO2 emissions, generating good economic and social benefits. As of the end of 2023, Changqing Oilfield has conducted 65 injection production scale CCUS field tests in ultra-low permeability reservoirs in Huang3 and Huang138 areas of Jiyuan Oilfield, Zhuluo series low-permeability reservoirs in Huang436 area of Jiyuan Oilfield, and shale reservoirs in Longdongxi 233 area, achieving good application results. Among them, Huang3 District has doubled its production and is expected to increase its recovery rate by more than 15.1%. As of now, the economic benefits have increased by 1.0502 billion yuan.
New Industry And Energy
Technologies to improve natural resource extraction
2024-2026
China and other BRICS countries
The permanent geological storage of carbon dioxide is currently the core technology for reducing greenhouse gas emissions internationally. This includes injecting carbon dioxide into tight oil reservoirs to improve oil recovery and collaborate with carbon sequestration monitoring. Among them, carbon sequestration industrialization and industrialization are important means to support China in achieving its dual carbon goals. However, so far, carbon sequestration technology has faced three major global challenges: low prediction accuracy, short sequestration time, and difficulty in long-term monitoring. Based on this, the team integrated core technologies and pioneered a carbon dioxide storage monitoring system, which was first applied to a national CCUS demonstration project to achieve efficient software and hardware collaborative carbon dioxide storage monitoring. Four core technological innovations have been completed: firstly, by combining variable mass flow and multi-scale transmission coupling models, a CO2 displacement fluid distribution prediction technology has been developed, achieving oil and gas flow from nanometer to meter levels with a prediction accuracy of 98%. Secondly, the mixed phase effect is defined by the change rate of light hydrocarbon components, forming a dynamic monitoring technology for carbon dioxide mixed phase drive effect. Compared with existing technologies, the mixed phase evaluation effect has been improved by three times. Thirdly, we pioneered the simulation and installation of carbon dioxide storage in deep saline water layers, achieving full process and multi-element storage. Compared with oil displacement devices, the storage time increased by 89%. Fourthly, we will propose technologies for the full cycle recycling of production gas and monitoring and evaluation of CO2 leaks. Through CCUS full lifecycle simulation and control, we will achieve intelligent and spatially integrated CO2 leak monitoring and evaluation. Our product serves the national CCUS demonstration project of Changqing Oilfield in China, increasing the carbon dioxide storage capacity by 320000 tons and predicting the diffusion of different risk areas, providing 10-15 minutes of early warning for on-site accidents. In addition, we will also apply our products to Changqing Oilfield, increasing crude oil production by 286000 tons and sequestering 551000 tons of carbon dioxide, effectively supporting cost reduction, efficiency improvement, and green development of the oilfield.
2024 the Belt and Road and BRICS Skills Development and Technological Innovation Competition South Africa International Competition - Technological Innovation Competition entered the international competition; National Second Prize in the "Black Technology" Special Competition of the 2023 "Challenge Cup" Extracurricular Academic and Technological Works Competition for College Students; Provincial silver medal of the 9th Internet plus Competition in Sichuan Province;
DEVICE FOR SIMUL ATING CAR BON DIOXIDE STOR AGE IN DEEP SALINE AQUIFER（USA patent）；DEVICE FOR SIMUL ATING CAR BON DIOXIDE STOR AGE IN DEEP SALINE AQUIFER（China patent CN 115788578 B）
