Abstract: Aiming at the influence of tide, wave, ocean current and drilling engineering on logging and logging while drilling depth system and cuttings lag depth, the methods of equipment-related professional sensors, physical indicators, controlling drilling parameters and proofreading in drilling process are used to achieve the purpose of collecting all kinds of geological data in the harsh deep water environment. It is of guiding significance to ensure the accuracy of geological related data in deep-water exploration operation. At present, many deep-water exploration wells in the eastern South China Sea have achieved good results.