Method and system for calculating friction torque while drilling in real time based on intelligent correction strategy

• Main Authors: LI CHANGSHENG, HUANG LIMING, DUAN JINAN, XU SHUGUO, FU XUAN
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRIC DIGITAL DATA PROCESSING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR

The invention provides a while-drilling friction torque real-time calculation method and system based on an intelligent correction strategy, and the method comprises the steps: firstly loading logging data and static data used for constructing a while-drilling friction torque model, calculating a whole-well axial force and torque with a ground hook load and torque as initial conditions, and drawing a whole-well axial force curve along the well depth; then, according to logging data, automatically identifying a tripping working condition, marking hook loads of different depths when the working condition is determined to meet conditions, selecting a curve with the maximum similarity according to a hook load calibration value and a Frechet distance of an axial force curve, and applying a corresponding optimal friction coefficient to correction of a while-drilling friction torque model; and finally, performing calculation by using the corrected while-drilling friction torque model. By adopting the scheme, the fri