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Recently, the advanced vertical drilling technology developed by American Baker Hughes was successfully implemented in the Dawan 1 well, a key exploration well located in the northeastern Sichuan Basin. This innovation effectively addressed the challenge of maintaining wellbore stability in formations with steep dip angles, significantly improving drilling efficiency. The mechanical drilling rate increased by three times compared to previous methods.
Dawan 1 is the first major exploration well drilled on the Dawan structure by the company. It was designed to reach a total depth of 5,995 meters. However, between 1,704 and 1,794 meters, the well deviation increased sharply from 3 degrees to 45 degrees, making it difficult to maintain the desired trajectory. To address this issue, with support from Sinopec Headquarters, the Southern Company coordinated with the construction team to apply Baker Hughes' vertical drilling system starting at a depth of 1,829.96 meters.
By February 16, the well had reached a depth of 2,444 meters, with a total footage of 555.04 meters. During this section, the well deviation was reduced to just 0.3 degrees, and the average mechanical drilling speed improved to 1.94 meters per hour. As of now, the well has been drilled deeper than 2,700 meters, marking a significant milestone in the project. This success demonstrates the effectiveness of modern drilling technologies in overcoming complex geological challenges and enhancing operational performance.