Research and application of deep well drilling speed-up technology in the Bayan area

Abstract

Under the current drilling technology conditions, in deeply buried reservoirs with poor mechanical drilling speed, complex formations such as hard, highly abrasive, and special well sections such as high inclination are drilled, the drilling speed is slow, and the drill and drilling tool assembly need to be tripped frequently to replace, resulting in low drilling efficiency, long drilling cycle, high drilling cost, and high safety risk. In this paper, the torsional impactor speed-up tool for hard formations is optimized by the impact vibration in the circumferential direction of the drill. The reciprocating motion of the piston drives the valve to generate a shut-off pressure pulse to optimize the high inclination. The hydraulic oscillator speed-up tool is used for horizontal wells and a static offset rotary steering system is used for directional acceleration of push-back deep wells. Combined with the characteristics of slow drilling rate in deep wells in the bayan area, field tests were carried out on wells Jihua x ping x, Xinghua x, and Linhua x ping x, and the drilling efficiency was increased by 38 %, 65 %, and 62 % compared with the adjacent wells, and the drilling cycle significantly shortened, which is of great significance for efficient drilling of deep wells in the Bayan area and improving the effectiveness of exploration and development.