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中国石油长庆油田煤岩气钻完井技术迭代破局
Jing Ji Wang· 2025-07-10 11:05
Group 1 - The success rate of horizontal drilling has reached 85.5%, with an average drilling cycle of 7.4 days, a significant improvement compared to three years ago [1] - The Longqing Oilfield has developed a coalbed methane drilling and completion technology 2.0 system, achieving a maximum horizontal section of 2500 meters and reducing the average drilling cycle by 45% compared to traditional methods [1] - The introduction of domestic drilling equipment has reduced costs and improved stability, allowing for continuous operation for 280 hours and decreasing the sliding footage to below 1% [1] Group 2 - Longqing Oilfield has developed a low-cost anti-collapse drilling fluid system that extends the coal seam collapse cycle to 27 days, effectively stabilizing the wellbore during drilling [2] - The new drilling fluid has a reduced density from 1.8 g/mL to 1.4 g/mL and a viscosity decrease from 120 seconds to 70 seconds, cutting costs by half [2] - A systematic management innovation approach has been implemented, including a collaborative innovation mechanism and a weekly technical meeting system to address on-site technical issues within 48 hours [2] Group 3 - Longqing Oilfield is accelerating the update of coalbed methane drilling and completion technology to 3.0, focusing on breakthroughs in 6.5-inch small borehole technology and new drilling fluid systems [3] - The goal is to establish a "low-cost + high-performance" technology route to further support the economic development of deep coalbed methane in China [3]