Non-destructive method of measuring physical characteristics of sediments
November 8, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3909776 System for plotting subsoil structure and method therefor Measurement of porosity and formation factor using slow compressional waves Assembly for use in seismic surveys of the sea bed Method and apparatus for measuring formation compression and shear wave velocity Method and system for seismic exploration employing a dual-dipole hydrophone streamer Bottom shear modulus profiler Acoustic well logging method and apparatus System for marine seismic exploration Method and apparatus for determining propagation velocities of elastic waves in a borehole InventorsAssigneeApplicationNo. 610563 filed on 11/08/1990US Classes:367/57, Vertical receiver or source array181/112, Plural detectors367/912Particular transducerExaminersPrimary: Steinberger, Brian S.Attorney, Agent or FirmInternational ClassG01V 001/00AbstractA non-destructive method of measuring physical characteristics of sediments to obtain a cross-sectional distribution of porosity and permeability values and variations, and of shear modulus and shear strength. A pair of boreholes have borehole entries spaced apart from each other at a predetermined distance, and a plurality of hydrophones are spaced at predetermined known positions. A source of seismic energy is placed into another borehole and activated to transmit seismic wave energy from the source to the hydrophones. Seismic wave characteristics are measured in a multiplicity of paths extending from the source to the hydrophones, using cross-bore hole tomography.Other References
Field of SearchWell loggingAmplitude measurement Peak amplitude Amplitude comparison Of noncompressional acoustic wave energy Frequency dependent determination Particular source-receiver array Vertical receiver or source array By receiver pattern arrangement PARTICULAR WELL-LOGGING APPARATUS Particular transducer Programmed or timer-controlled Directional source or detector Seismic wave generation Well logging Bore hole or casing condition Plural detectors | |
