Abstract: Systems and methods are provided to enhance logging data images. Some system embodiments include a dowhole tool, at least one sensor, and a processing system. The downhole tool gathers two-dimensional logging data while moving through a borehole. The sensor(s) measure at least one characteristic of the downhole tool's operation or environment, such as tool motion, offset distance, borehole geometry, and/or properties of the borehole fluid. Such characteristics can cause smearing or spreading of the tool's logging data measurements. Accordingly the processing system determines a de-spreading function based at least in part on the measured characteristic(s) and applies the de-spreading function to the two-dimensional logging data to obtain an enhanced logging data image, which can be presented to a user via a user interface.

Abstract: A nuclear magnetic resonance (NMR) logging tool assembly method that employs rotational indexing to optimize the sensing volume. At least some embodiments include establishing an initial arrangement of the permanent magnets and marking each magnet to indicate their relative rotational orientations in the initial arrangement. Thereafter a series of magnetic field measurements and individual magnet rotations are performed to improve the uniformity of the magnetic field in the sensing volume. Once a satisfactory arrangement has been found, the magnets may be secured together and an antenna array installed along with the electronics for performing relaxation time measurements and providing logs of formation properties that can be derived therefrom, such as porosity, permeability, density, rock type, fluid type, etc. The tool may be packaged as a wireline sonde, a tubing-conveyed logging tool, or a logging while drilling (LWD) tool.

Abstract: A nuclear magnetic resonance (NMR) logging tool assembly method that employs rotational indexing to optimize the sensing volume. At least some embodiments include establishing an initial arrangement of the permanent magnets and marking each magnet to indicate their relative rotational orientations in the initial arrangement. Thereafter a series of magnetic field measurements and individual magnet rotations are performed to improve uniformity of the magnetic field in the sensing volume. Once a satisfactory arrangement has been found, the magnets may be secured together and an antenna array installed along with the electronics for performing relaxation time measurements and providing logs of formation properties that can be derived therefrom, such as porosity, permeability, density, rock type, fluid type, etc. The tool may be packaged as a wireline sonde, a tubing-conveyed logging tool, or a logging while drilling (LWD) tool.

Abstract: Systems and methods are provided to enhance logging data images. Some system embodiments include a dowhole tool, at least one sensor, and a processing system. The downhole tool gathers two-dimensional logging data while moving through a borehole. The sensor(s) measure at least one characteristic of the downhole tool's operation or environment, such as tool motion, offset distance, borehole geometry, and/or properties of the borehole fluid. Such characteristics can cause smearing or spreading of the tool's logging data measurements. Accordingly the processing system determines a de-spreading function based at least in part on the measured characteristic(s) and applies the de-spreading function to the two-dimensional logging data to obtain an enhanced logging data image, which can be presented to a user via a user interface.