Cable-free logging depth correction method and device

• Main Authors: ZHAO JUNFENG, REN HAIRONG, HOU LIYUN, CAI RONG, RAN QING, LI FENGQIN
• Format: Patent
• Language: Chinese; English
• Published: 25.09.2018
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a cable-free logging depth correction method and device. The cable-free logging depth correction method comprises the steps that a correlation coefficient method is utilized tocompare a magnetic positioning curve for well cementation and logging and actual casing joint depth to obtain well cementation and logging depth correction quantity; according to the well cementationand logging depth correction quantity, the magnetic positioning curve for well cementation and logging and a GR related curve for well cementation and logging are corrected to obtain corrected well cementation and logging GR depth; depth correction is conducted on naked-eye well logging GR depth and the corrected well cementation and logging GR depth to determine naked-eye GR well logging depth correction quantity; according to the naked-eye GR well logging depth correction quantity, the naked-eye well logging GR depth and the GR related curve for well cementation and logging are corrected. The problem is solved that