Abstract: Methods, systems, and computer program products for characterizing materials in a wellbore having multiple casing strings uses well completion data and instantaneous frequency, instantaneous phase, and/or amplitude attributes, including waveform amplitude or instantaneous amplitude, of an acoustic waveform to determine material densities, acoustic velocities and acoustic travel distances for the materials between the various stages of casings.

Abstract: Methods, systems, and computer program products for characterizing materials in a wellbore having multiple casing strings uses well completion data and instantaneous frequency, instantaneous phase, and/or amplitude attributes, including waveform amplitude and instantaneous amplitude, of an acoustic waveform to determine material densities, acoustic velocities and acoustic travel distances for the materials between the various stages of casings.

Abstract: A method for forming a high resolution logging while drilling image includes receiving a logging while drilling data set and selecting a borehole grid. The borehole grid includes a plurality of pixels that define discrete azimuthal positions and depth positions in the borehole. The LWD data set is mapped to the selected borehole grid such that an azimuthal position and a depth position are assigned to each data point in the data set. An interpolation routine is used to fill empty pixels. Disclosed embodiments enable high resolution LWD imaging that may resolve various fine formation features such as fractures, fine bedding layers, breakout, and vugs.

Abstract: A method for forming a high resolution logging while drilling image includes receiving a logging while drilling data set and selecting a borehole grid. The borehole grid includes a plurality of pixels that define discrete azimuthal positions and depth positions in the borehole. The LWD data set is mapped to the selected borehole grid such that an azimuthal position and a depth position are assigned to each data point in the data set. An interpolation routine is used to fill empty pixels. Disclosed embodiments enable high resolution LWD imaging that may resolve various fine formation features such as fractures, fine bedding layers, breakout, and vugs.

Abstract: The present invention provides a method and apparatus for logging an earth formation and acquiring subsurface information wherein a logging tool is conveyed in a borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, magnetic or electrical values as known in the art. As necessary, azimuths associated with the measurements are obtained and corrections applied. The corrected data may be filtered and/or smoothed. The parameters of interest associated with azimuthal sectors are depth matched, resolution matched and filtered, and the acquisition effects removed. The data are denoised using a multi-resolution wavelet transform. The data acquired with separate transducers are resolution matched to obtain a resolution matched data series. Subsequently the resolution matched data may be further denoised using a multi-resolution wavelet transform.

Abstract: The present invention provides a method and apparatus for logging an earth formation and acquiring subsurface information wherein a logging tool is conveyed in a borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, magnetic or electrical values as known in the art. As necessary, azimuths associated with the measurements are obtained and corrections applied. The corrected data may be filtered and/or smoothed. The parameters of interest associated with azimuthal sectors are depth matched, resolution matched and filtered, and the acquisition effects removed. The data are denoised using a multi-resolution wavelet transform. The data acquired with separate transducers are resolution matched to obtain a resolution matched data series. Subsequently the resolution matched data may be further denoised using a multi-resolution wavelet transform.

Abstract: The invention provides a wound dressing comprising: a liquid-permeable top sheet having a wound facing surface and a back surface, said top sheet being adapted to block or restrict passage of liquid from the back surface to the wound facing surface; and an insoluble hydrogel layer adjacent to the back surface of the top sheet.