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At 8:00 am on January 3rd 2024, the daily drilling depth of the 215.9mm LMX formation in the Ning209H73-6 well of PetroChina Southwest Oil and Gas Field Company exceeded one mile by 1619 meters, marking the first time that the daily drilling depth of shale gas horizontal wells in China has reached a new level of “daily drilling miles”.

In response to the geological conditions where the thickness of shale gas reservoirs in southern Sichuan is only one-quarter to one eighth of that in North America, and the drillability of shale is 30% to 50% lower, Southwest Oil and Gas Field Company has carried out integrated drilling speed improvement work, continuously challenging drilling limits and bravely climbing new peaks in speed.

One is to further refine the integration of geological engineering. Combining well seismic data with timely correction of geophysical data, precise fracture prediction, real-time updating of geological guidance models, “selecting the best from the best” to lock in the “double sweet target” of geological engineering, selecting a 1-meter target with high mechanical drilling speed and low rotational guidance vibration within a 4-meter “platinum target”, and accurately controlling the trajectory to smoothly traverse. The average mechanical drilling speed on that day was 100.06 meters per hour, breaking the “100 meter mark” for the first time.

The second is to further optimize scientific drilling technology. Relying on professional software and utilizing big data to continuously revise models, combined with geological conditions to optimize rotary drilling tools, customized strong attack and high stability PDC drill bits, innovatively tested medium speed screws and achieved success for the first time; The Drilling Optimization Center tracks and simulates the equivalent density and friction coefficient at the bottom of the well in real-time, monitors the cleanliness of the wellbore, and ensures drilling safety under extreme acceleration conditions.

The third is to further elevate the management of the “daily fee system”. Adopting the drilling “daily fee system” model, Party A takes the lead in preparing key tools and materials, coordinates the cooperation of various specialties, and prepares complex disposal plans; Optimize the operation processes such as issuing instructions and connecting columns, shorten the time for connecting columns to less than 5 minutes, significantly improve the efficiency of pure drilling, and lay a solid foundation for improving drilling speed and efficiency.