Study on differentiation characteristics of multi depth resistivity curves and its geological guidance application
At present,the resistivity LWD tool without azimuth recognition function is difficult to popularize in the industry due to its large uncertainty and many manual interventions.With the deepening of oil exploration and development,the development of thin oil layer,fault block oil layer,bottom water and edge water layer has become the norm,which puts forward higher requirements for geological guidance technology of LWD.For this reason,this paper simulates LWD in thin layer,near boundary,far boundary,anisotropic formation,inclined formation,etc.According to the relationship between curve differentiation characteristics and formation occurrence,the indication signals indicating key geological parameters such as formation anisotropy,boundary position and dip angle are defined,and the quantitative calculation method of indication signals is given.According to the good correspondence between signals and formation occurrence parameters,the formation occurrence information of real-time LWD data is interpreted with the help of inversion technology.The formation boundary distance is obtained by logging while drilling resistivity data,the reservoir occurrence is predicted,and the resistivity information around the borehole is extracted to guide geological guidance.This method has the advantages of no manual intervention,fast calculation speed and high reliability based on measured data.It provides a new method for the popularization and application of instrument geological guidance technology without azimuth recognition ability.
万方数据
维普
