High Precision Drilling Resistivity Imaging Processing Method And Software Module Development

Conventional cable well wall electrical imaging logging has been recognized and widely used by the world's major oil fields for their high resolution and intuitive images.However,conventional cable well wall electrical imaging logging is more applicable in vertical wells and is not suitable for horizontal wells and other inclined shafts.However,the drilling electric imaging logging is suitable for measurement in inclined shafts.Therefore,the drilling electric imaging logging electric imaging is increasingly valued by major companies.In this paper,based on the conventional well wall electrical imaging,the electrical imaging method of the drilling wall is studied with the numerical simulation data of the electrical imaging of the drilling wall and the real well logging data of the conventional cable wall imaging.The content mainly includes the data preprocessing before imaging,image generation,automatic crack parameter calculation,automatic crack picking,fracture interaction calculation,fracture cavity property evaluation and porosity spectrum analysis.The data preprocessing includes bad electrode rejection,geometric correction,voltage correction,drilling speed correction,normalization processing and azimuth correction.While researching the method,the software design and development are based on the domestically designed instrument model and data storage format.The software is implemented and tested on the LogPlus software platform of Sinopec in the form of a dynamic link library to verify the correctness of the algorithm and eventually achieve practical effect.