Technicians of oil comprehensive logging instrument need to obtain well control certificate, HSE certificate and hydrogen sulfide training certificate. According to relevant public information, well control certificate, HSE certificate and H2S training certificate are required for the qualification requirements of petroleum comprehensive logging instruments, among which H2S training certificate is required in sulfur-bearing areas. The professional technical requirements of petroleum comprehensive logging instrument division are: having the qualification of engineer or technician or above after examination by the national personnel department. The work of the oil comprehensive logging instrument engineer is: responsible for the installation, disassembly, calibration, use, maintenance and repair of the equipment, ensuring the normal operation of the instrument, obtaining all the original data, completing the engineering report required by Party A's supervision, analyzing and judging the abnormal engineering parameters and gas logging, making a preliminary explanation, and notifying relevant personnel to make an abnormal forecast.