A major breakthrough has been achieved in the Sichuan Basin's northern Bazhong region for onshore natural gas exploration. A key pre-exploration well, Yuanlu 33, deployed in Bazhong City, Sichuan Province, has successfully yielded a high and stable industrial gas flow exceeding one million cubic meters per day during testing. This success further solidifies the proven resource base of hundreds of billions of cubic meters in the Bazhong area and is highly significant for supporting the construction of the Sichuan-Chongqing hundred-billion-cubic-meter natural gas base.

The target layer of this well is situated at a considerable depth, representing a typical deep, tight sandstone gas reservoir characterized by complex geological structures, thin reservoir layers, and dense lithology, which pose significant challenges for exploration and development. The exploration team continuously enhanced its research efforts targeting deep, tight sandstone gas reservoirs. They innovatively established models for high-quality reservoir development and natural gas enrichment leading to high yields and developed a sequence of reservoir prediction technologies to precisely identify enriched, high-yield zones.

Given the well's target layer's developed fracture zones and high operational risks, a dedicated, integrated team combining geology and engineering, as well as exploration and development expertise, was formed. This team successfully overcame challenges related to drilling and testing technologies. High yields were achieved using conventional perforation testing methods, significantly reducing overall exploration and development costs.