WELLBORE CROSS SECTION SHAPE MEASUREMENT METHOD, DEVICE AND TERMINAL

• Main Authors: YANG, Zhentao, XU, Jianxia, FANG, Xinding
• Format: Patent
• Language: Chinese; English; French
• Published: 28.03.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; 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

The invention belongs to the technical field of well measurement, and particularly relates to wellbore cross section shape measurement method, device, terminal and computer-readable storage medium. The method comprises the following steps: obtaining multiple pieces of well measurement data, at the same depth of a well casing, of a multi-arm well diameter instrument; the well measurement data comprises a well wall coordinate with the center of the multi-arm well diameter instrument as a reference point; according to the well wall coordinates, fitting an evaluation function utilizing a least square method with a boundary condition to obtain a wellbore central coordinate and the radius of the wellbore at the depth of the well casing; wherein the boundary condition is that, the distance between the well wall coordinate and the wellbore central coordinate is greater than or equal to the radius of the wellbore; in this way, it is ensured that the well wall coordinate is located outside or on a circle obtained by me