Recently, the Southwest Petroleum Bureau Oil and Gas Testing Center successfully completed a pressure-changing operation on the gas wellhead gate valve at Well Chuanhe No. 127, effectively removing a blockage caused by calcium deposits through conventional acidizing. As a result, the Nissan natural gas production reached 56,000 cubic meters, and the old well was successfully revitalized. Located in Panjiang Town, Luojiang County, near the Kai River, the Chuanhe No. 127 well is part of the Hexing field structure and was previously an old well. Before this operation, after a secondary workover, the well could produce more than 10,000 cubic meters of natural gas per day. However, during the shut-in period, a leak was detected in the main tree valve, posing a potential safety risk.
Traditionally, replacing the tree gate valve would require stabilizing the well with pressure before proceeding. However, the successful application of the pressure-changing wellhead gate valve technology at Chuanhe No. 127 not only saved significant costs but also avoided any damage to the production layer, ensuring environmental protection and preserving the integrity of the reservoir. This innovative approach demonstrated both efficiency and safety, setting a new standard for similar operations in the future. The project highlights the importance of adopting advanced technologies to enhance well performance while minimizing risks and environmental impact.
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