Abstract: During the investigation of a deepwater well site in the South China Sea,the observation of ocean current profiles was simultaneously completed by the shipboard ADCP. During the survey period,the ocean current from 190 m to 500 m continued to be northeastward,opposite to the direction of the shallow ocean current at 190 m. This phenomenon was verified by the previous research results and reanalysis data. Through this experiment,it is confirmed that this observation mode can obtain accurate current data during deepwater well site surveys.

Key words: shipboard ADCP, offshore oil and gas field, well site survey, South China Sea warm current