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Xing G.,Yanshan University | Wang H.,Daqing Well Logging Company | Ding Z.,Daqing Well Logging Company
IEEE Transactions on Geoscience and Remote Sensing | Year: 2010

A high-frequency electromagnetic-wave logging (HFEL) tool has been developed to detect the dielectric constant and resistivity of the sedimentary formation by measuring the phase difference and amplitude ratio synchronously. The single-parameter deconvolution method is a convenient tool for enhancing the vertical resolution of the curves and reshaping the curves themselves. This paper attempts to resolve the two parameters, the dielectric constant and the resistivity, which are employed in the deconvolution method from two responses: the phase difference and amplitude ratio. First, an adaptive dual-parameter deconvolution method for the HFEL dielectric constant and resistivity measurements is devised to enhance the vertical resolution of the tool and to more accurately extract the formation parameters, namely, the dielectric constant and resistivity. The advantages of this method are revealed in the numerical experiments on the synthetic and actual logging data. The adaptive dual-parameter deconvolution can be informative in the application of the deconvolution. © 2010 IEEE.


Chen H.,CAS Beijing Institute of Acoustics | Wang X.,CAS Beijing Institute of Acoustics | Yang X.,Daqing Well Logging Company
ICTCA 2011 - 10th International Conference on Theoretical and Computational Acoustics, Proceeding | Year: 2012

Cross dipole logging can be used for predicting horizontal transverse isotropy of a formation that apparently generates shear wave separation. This characteristic is used for identifying formation anisotropy distributions near the borehole, so that formation stress and fracture in a real formation can be evaluated. Two different simulated annealing methods are tested. It shows one is faster but affected by the parameter interval heavily. Another is more stable but may slower in smaller interval. Incorporating the logging data consecutive alteration in following depth point, one hybrid simulated annealing method is developed to extract the anisotropy magnitude and the fast shear wave direction from 4 components cross dipole data. Field test data shows the method can give the fast shear wave angle much smoother than the inversion method by very fast simulated annealing only.

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