Core Viewpoint - Jilin Oilfield is advancing the implementation of a pilot project for enhanced gas recovery (CCUS-EGR) at the Changling gas field, marking the beginning of a collaborative development model for CO2-driven enhanced oil recovery (CCUS-EOR) and CCUS-EGR [1][2] Group 1 - The Changling gas field is crucial for maintaining stable natural gas production in Jilin Oilfield, but it currently has a low recovery rate despite having potential for improvement [1] - Jilin Oilfield aims to integrate EOR and EGR processes by leveraging existing advantages in gas sources, facilities, and pipeline networks, while utilizing mature CCUS technologies [1] - The EOR process produces associated gas with CO2 concentration 70% lower than the injected CO2, which can affect the efficiency of miscible displacement [1] Group 2 - The feasibility study for tight gas CCUS-EGR was initiated based on earlier research, focusing on the Longshen D Ping 2 well area, which has significant remaining reserves and high initial production capacity [2] - The design includes three sets of injection and production wells, with parameters for injection volume, pressure, method, and cycle established, aiming for a 12.5% increase in recovery rate [2] - The initial phase will involve only injection, followed by simultaneous injection and production after pressure buildup [2]