Group 1 - The core viewpoint of the news is that China National Petroleum Corporation (CNPC) has applied for a patent for a method to calculate equivalent permeability in gravel oil reservoirs, which is significant for enhancing unconventional oil and gas resource development and optimizing gas drive extraction strategies [1]. Group 2 - CNPC was established in 1999 and is primarily engaged in oil and gas extraction, with a registered capital of 18,302,097,000 RMB [2]. - The company has made investments in 1,294 enterprises and participated in 443 bidding projects, holding 38 trademark records and 5,000 patent records, along with 168 administrative licenses [2].