基于水力能量利用效率的超深井钻井提速技术

ROP increasing method based on the utilization efficiency of hydraulic power for the ultra-deep wells

张广峰 易灿 闫振来

ZHANG Guangfeng YI Can YAN Zhenlai

胜利石油管理局渤海钻井二公司，山东东营　257200 胜利石油管理局钻井工艺研究院，山东东营　257017

Shengli Petroleum Administration No.2 Bohai Drilling Company, Dongying 257200, China Drilling Technology Research Institute of Shengli Petroleum Administration, Dongying 257017, China

水力因素是影响钻速最活跃的因素之一。为了最大限度地利用水力能量，提高超深井钻井速度，利用编制的软件，对影响水力能量利用效率各因素进行了分析。结果表明，超深井采用?139.7 mm钻杆代替?127 mm钻杆，1000 m可减小泵压约0.6 MPa；黏度每降低10 mPa·s，泵压可降低0.4 MPa左右；密度每增加0.1 g/cm3，泵压增加0.8 MPa左右；排量每增加1 L/s，泵压增加1 MPa以上。同时，分析了超深井钻井喷射钻井的可行性及实现方式，指出超深井水力参数设计需按最小流量法设计，为提高超深井钻井速度提供了有益的参考。

Hydraulic factor is one of the most important parameters which can affect ROP. To optimize the utilization of hydraulic power and increase the ROP for ultra-deep wells, all of the factors that can affect the utilization efficiency of the hydraulic power were analyzed. The results demonstrate that if ?139.7 mm drill pipe is used instead of ?127 mm drill pipe, the pump pressure would reduce 0.6 MPa/1000 m; and pump pressure would reduce about 0.4 MPa with drilling fluid viscosity decreasing 10 mps; pump pressure increases 0.8 MPa with drilling fluid density increasing 0.1 g/cm3; and pump pressure increases more than 1 MPa with pump rate increasing 1 L/s. Meanwhile, the feasibility and implement method of jetting drilling on ultra-deep wells was analyzed, and point out that the ultra-deep well hydraulic parameters design should follow the minimum flow rate designing method, and also provides good reference for ROP improvement of ultra-deep wells.