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 borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, magnetic or electrical values as known in the art. The parameters of interest are acquired with a plurality of sensors. For time based image data, the time separation values between signals acquired from separate sensors for individual subsurface features are determined. The time separation values may be determined using correlation or other methods illustrated herein or as known in the art. Using known sensor spatial separations and time separation values a drill rate is determined and an incremental depth for the subsurface feature is defined.

Abstract: A method of carrying out a certain action on a model, such as a business measures model (BOM Observation Model), wherein the model includes a plurality of elements, the or each of which represent a part of the model, the method comprising extracting each element of the model using a element extraction process; determining a logical grouping for each extracted element; determining one or more parameters relating to each extracted element; determining a hierarchy of the extracted elements to produce a hierarchical tree diagram of the extracted elements of the model based on the logical grouping; including the or each parameter with each extracted element in the hierarchical tree diagram; and using the hierarchical tree diagram to access the one or more parameters of each element to allow the certain action to be carried out.

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 borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, magnetic or electrical values as known in the art. The parameters of interest may be transmitted to the surface at a plurality of resolutions using a multi-resolution image compression method. Parameters of interest are formed into a plurality of Cost Functions from which Regions of Interest are determined to resolve characteristics of the Features of interest within the Regions. Feature characteristics may be determined to obtain time or depth positions of bed boundaries and borehole Dip Angle relative to subsurface structures, as well borehole and subsurface structure orientation. Characteristics of the Features include time, depth, and geometries of the subsurface such as structural dip, thickness, and lithologies.

Abstract: A data compression technique for MWD applications uses feature detection, extraction, followed by image compression for only the region(s) of interest. The detection approach processes data in real time. It triggers on the start and end of a feature without processing any further features. This provides feature detection with zero latency.

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 borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, magnetic or electrical values as known in the art. The parameters of interest are acquired with a plurality of sensors. For time based image data, the time separation values between signals acquired from separate sensors for individual subsurface features are determined. The time separation values may be determined using correlation or other methods illustrated herein or as known in the art. Using known sensor spatial separations and time separation values a drill rate is determined and an incremental depth for the subsurface feature is defined.

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 borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, magnetic or electrical values as known in the art. The parameters of interest may be transmitted to the surface at a plurality of resolutions using a multi-resolution image compression method. Parameters of interest are formed into a plurality of Cost Functions from which Regions of Interest are determined to resolve characteristics of the Features of interest within the Regions. Feature characteristics may be determined to obtain time or depth positions of bed boundaries and borehole Dip Angle relative to subsurface structures, as well borehole and subsurface structure orientation. Characteristics of the Features include time, depth, and geometries of the subsurface such as structural dip, thickness, and lithologies.

Abstract: An apparatus and method is disclosed for measuring ultrasound drilling mud velocity downhole in real time. One or more generated acoustical pulses are detected upon traversing two separate path lengths, and ultrasonic velocity is determined from differences in the pulses upon traversing their respective path lengths. Alternately, a single measurement can be made using an acoustic pulse traversing a specified path length. A transducer is discussed having a piezoelectric crystal, a backing material having matching impedance, and a facing material disposed between the crystal and the fluid having an impedance intermediate to crystal and fluid. A concave front face of the crystal increases sensitivity to off-axis signals. Improved signal resolution can be achieved using a controlled shape input pulse optimized for certain drilling conditions. A method of echo detection using wavelet analysis is preferred.