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The Dushen-1 well is a pre-exploration vertical well located in the Chengdu Sag of the western Sichuan Depression. It targets the Middle Triassic Leikoupo Formation and the Upper Triassic Maantang Formation, with a total designed depth of 6,350 meters. The well aims to explore deeper geological structures and unlock potential hydrocarbon reserves.
Prior to the drilling operation, the team thoroughly prepared all necessary materials based on the drilling design and developed targeted technical measures and emergency response plans. A detailed technical briefing was conducted to ensure everyone was fully informed and ready. During the construction phase, the team focused on optimizing and maintaining the performance of the drilling mud, carefully selecting drilling parameters, and strictly following operational procedures to guarantee high-quality turbine drilling.
The application of the "pregnancy diamond drill + turbine" technology in the Shoudi Formation not only achieved record-breaking drilling efficiency but also allowed for the successful penetration of a high-pressure fractured gas layer in the Xiaotangzi Formation. For the first time in the western Sichuan region, oil and gas shows were detected, marking a major milestone in the area’s exploration efforts. This success highlights the effectiveness of advanced drilling technologies and sets a new benchmark for future operations in the region.
Pre-set diamond drill bit to create the shortest time record of turbine drilling
Abstract Recently, a significant breakthrough was reported from the Chuanxi Zangshang pre-occupation front line. The Dushen-1 well, drilled by the Sichuan Drilling Company's 70139XN team, successfully applied turbine drilling technology in the highly abrasive section between 2,530 and 10,777 meters, completing 467 meters of drilling in just 23.4 days. This achievement marks the shortest turbine drilling time ever recorded in the Shoudi Formation within the western Sichuan area.