Advances in research on stratigraphic characteristic parameter modeling and safety early warning for deep geological drilling processes
[Significance]As the new round of national exploration&development planning continues,resource explora-tion is advancing toward the deep Earth.However,deep strata exhibit diverse rock types,which complicate the measure-ment of rock mechanical parameters.Furthermore,the harsh environments of these strata,characterized by high temper-atures,high pressures,and high in-situ stress,are prone to induce downhole accidents like drilling tool failure,wellbore collapse,loss of circulation,and well kicks,posing challenges to geological drilling.[Advances]Aiming at the percep-tion and modeling of complex geological environments,this study reviews the existing studies on the modeling of strati-graphic characteristic parameters from the perspective of formation drillability and formation pressure,aiming to provide guidance for the technique adjustment and efficiency optimization of geological drilling processes based on these two key characteristic parameters.To satisfy the demands for safe and efficient geological drilling,this study explores the ad-vances in research on the safety early warning of the geological drilling process from two perspectives:wellbore stabil-ity assessment and downhole failure monitoring.The safety early warning technology allows drillers to promptly find and identify downhole accidents and,accordingly,eliminate potential safety hazards in advance.[Prospects]Under the more complex and harsh geologic conditions of deep strata compared to those of shallow ones,the models of stratigraph-ic characteristic parameters will play a more significant role in the geological drilling process,and the safety early warn-ing technology will act as the core technology in the next generation of intelligent geological drilling equipment.In the future,it is necessary to build an intelligent geological exploration system with the geological exploration data platform as the core,make data play a key role in the whole process of geological exploration and mineral exploitation,and pro-mote the application of artificial intelligence in the optimization of the geological drilling process,the perception of stratigraphic environments,and prospecting predictions.The purpose is to ensure safe and efficient geological drilling.
geological drillinggeological drilling processenvironmental perceptionmodeling of a stratigraphic char-acteristic parameterssafety early warninggeological exploration data platform