Research of Imaging Interpretation Model of CAT Logging Data

The capacitance array tool (CAT) uses twelve probes distributed symmetrically to measure the response at different azimuths in the wellbore. It is especially suitable to measure highly-deviated wells and horizontal wells, and can intuitively reflect the phase distribution of fluid in the wellbore to image the logging information. This paper considers the dynamic subdivision of instrument rotation, and an imaging algorithm based on the modified Gaussian weighting function is proposed. This algorithm uses different parameters, vertically and horizontally, to adapt to the stratification phenomenon of fluid. In order to improve adaptability, the algorithm introduces the correction coefficient which is determined by using optimization. The results show that the imaging effect coincides well with the corresponding photographs.