Research On New Technology For Pre-drilling Prediction Of Ultra Deep Water Shallow Geological

At the present stage,on the background of land resource exploration,the huge resources treasure house of the ocean has not been well developed and used.Especially in China's South China Sea,the development of mineral resources is relatively low.Only when we go deep into the sea can we effectively reduce the energy pressure of our country.In the field of offshore oil exploration and development,the development of deepwater oil and gas fields has played a very important role.However,the deep-sea geological environment is very complicated,which is very different from the continental geological conditions.This greatly affects the development of deep-sea oil and gas fields in China.In particular,the shallow geological hazard represented by"three shallow" is a great threat to the safety of drilling operations.Through the analysis of many drilling accidents at home and abroad,it has been shown that the successful prediction of "three shallow" geological disasters is related to the success or failure of the deepwater drilling.Therefore,it is particularly necessary to predict the shallow geological disasters in deep water drilling and propose corresponding prediction methods and techniques.On the basis of introducing the present situation of offshore ultra deep drilling at home and abroad,this paper analyzes in detail the types of shallow geological disasters in deep water.This paper probes into the cause of the formation of the shallow geological disaster,represented by "three shallow",and analyzes and discusses the harm of shallow geological hazards of natural gas hydrate,shallow gas and shallow water flow to deep water drilling.This paper introduces different prediction techniques of shallow geological hazards in super deep water,and on this basis puts forward the corresponding prediction recognition technology,and makes use of the existing seismic data to analyze and study the related technologies.In view of the present research status,it is creatively proposed that the characteristics of geostress are used to predict shallow geological hazards,and the prediction theory of ground stress to shallow geological disasters is discussed,and the prediction ideas are put forward,and in accordance with the results of previous research and the application effect of other fields,the ground stress technology is drilled in the ultra deep shallow geological disaster before drilling.The prospect of application in the prediction field.Finally,according to the research process and the previous research experience,a set of effective pre drilling prediction process for shallow geological disaster in ultra deep water is summed up in order to guide the pre drilling prediction work of shallow geological disaster in ultra deep water,and to evaluate the prediction effect quantized and give the corresponding solutions according to the evaluation results.In order to better guide the drilling work.