Sou Hu Cai Jing·2026-02-06 02:57Core Viewpoint - China National Petroleum Corporation (CNPC) has applied for a patent related to a method for characterizing residual oil in oil reservoirs under carbon dioxide flooding, which is expected to enhance the economic benefits of carbon capture, utilization, and storage (CCUS) technology in aging oil fields [1]. Group 1: Patent Application - CNPC has filed a patent titled "A Method for Characterizing Residual Oil in Oil Reservoirs under Carbon Dioxide Flooding," with publication number CN121456242A, and the application date is August 2024 [1]. - The patent describes a method that includes steps for extracting the lower limits of carbon dioxide flooding reservoir properties at different development stages and quantifying the remaining oil in the block [1]. - The beneficial effects of this invention include the ability to conveniently, accurately, and quickly predict the distribution of the carbon dioxide flooding front, which is crucial for improving recovery rates in aging oil fields [1]. Group 2: Company Overview - China National Petroleum Corporation was established in 1999 and is headquartered in Beijing, primarily engaged in oil and natural gas extraction [1]. - The company has a registered capital of 18,302,097 million RMB [1]. - CNPC has invested in 1,298 enterprises, participated in 443 bidding projects, holds 38 trademark registrations, and has 5,000 patent records, along with 168 administrative licenses [1].