公开(公告)号：US20230204814A1

公开(公告)日：2023-06-29

申请号：US17927749

申请日：2021-05-25

申请人： CHINA NATIONAL PETROLEUM CORPORATION ,  CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED

发明人： Dengyun Lu ,  Jing Bai ,  Lei Li ,  Jichuan Zhang ,  Chongjun Huang ,  Chong Liao ,  Junbin Chen ,  Bin Zhang ,  Zhigang Dong ,  Xinjian Wang

IPC分类号： G01V5/12

CPC分类号： G01V5/12

摘要： A gamma fusion computing method based on gamma probe parameters is provided, which relates to the technical field of oil drilling equipment while drilling, including: acquiring measurement values of two gamma probes in one continuous rotation period, and utilizing a mean value and a variance of the measurement values in the one rotation period as an evaluation reference value of each gamma probe; determining whether the gamma probes are abnormal, if the two gamma probes are both normal, utilizing the weight values to perform weight fusion on the measured values measured by two gamma probes, and if there is a gamma probe that is abnormal, then multiplying the average of the measured values of the normal gamma probe in the rotation period by 2 as a gamma output value for output. The gamma fusion computing method is capable of accurately determine the abnormal conditions of the gamma probes and effectively resolve the abnormal output. If there is no abnormal gamma probe, the outputted gamma value is also more accurate, which may do well in providing the engineering and technical personnel with correct identification.