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Class Information
Number: 367/30
Name: Communications, electrical: acoustic wave systems and devices > Seismic prospecting > Well logging > Amplitude measurement > Amplitude comparison
Description: Subject matter wherein differences in amplitudes are used to determine some characteristic of the acoustic medium.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8326542 Method and system for retrieving seismic data from a seismic section in bitmap format Dec. 4, 2012
7808859 Oscillating shear valve for mud pulse telemetry Oct. 5, 2010
7686099 Downhole positioning system Mar. 30, 2010
7675813 Methods and systems for detecting arrivals of interest Mar. 9, 2010
7574303 Seismogram correction for absorption effects Aug. 11, 2009
7525872 Method and apparatus for cement bond evaluation using transversely polarized shear waves Apr. 28, 2009
7423930 Methods and systems for detecting arrivals of interest Sep. 9, 2008
7382683 Computing an absorption parameter for a mode-converted seismic wave Jun. 3, 2008
7280432 Oscillating shear valve for mud pulse telemetry Oct. 9, 2007
6868038 Seismic method of performing the time picking step Mar. 15, 2005
6842400 Acoustic logging apparatus and method Jan. 11, 2005
6739692 Ink jet recording apparatus May. 25, 2004
6473695 Method for direct hydrocarbon reservoir detection and delineation by low frequency acoustic spectroscopy Oct. 29, 2002
6205087 Sonic data logging system Mar. 20, 2001
6188643 Method and apparatus for inspecting well bore casing Feb. 13, 2001
6175536 Cross-well seismic mapping method for determining non-linear properties of earth formations between wellbores Jan. 16, 2001
6084825 Apparatus and methods for seismic data processing Jul. 4, 2000
6018495 Method of borehole compensation of earth formation characteristic measurements using depth measurements Jan. 25, 2000
5999485 Method of distinguishing geological sequences and their boundaries Dec. 7, 1999
5784333 Method for estimating permeability of earth formations by processing stoneley waves from an acoustic wellbore logging instrument Jul. 21, 1998
5654938 Method for identifying alteration of earth formations using dipole acoustic logging Aug. 5, 1997
5485431 Measurement of nonlinear formation parameters using sonic borehole tool Jan. 16, 1996
5416750 Bayesian sequential indicator simulation of lithology from seismic data May. 16, 1995
5361239 Compensation method using a single transmitter measurement tool Nov. 1, 1994
5229552 Method and apparatus for the downhole measurement of elastic rock properties Jul. 20, 1993
5222048 Method for determining borehole fluid influx Jun. 22, 1993
5216638 Method and apparatus for the acoustic investigation of a casing cemented in a borehole Jun. 1, 1993
5214251 Ultrasonic measurement apparatus and method May. 25, 1993
5197038 Method and sonic tool apparatus for investigating properties of earth formations transversed by a borehole Mar. 23, 1993
5138585 Method for fluid identification and evaluation within wellbores using ultrasonic scanning Aug. 11, 1992
4951267 Method and apparatus for multipole acoustic logging Aug. 21, 1990
4896303 Method for cementation evaluation using acoustical coupling and attenuation Jan. 23, 1990
4888740 Differential energy acoustic measurements of formation characteristic Dec. 19, 1989
4881207 Seismic prospection method providing improved knowledge of the geological discontinuities of the subsoil Nov. 14, 1989
4864545 Process for the detection of heterogeneities and/or for the determination of petrophysical characteristics of geological strata of a medium to be explored Sep. 5, 1989
4849945 Seismic processing and imaging with a drill-bit source Jul. 18, 1989
4799200 Method of acoustically detecting fractures in a borehole Jan. 17, 1989
4797860 Method for shot point analysis of seismic reflection signals Jan. 10, 1989
4764903 Method and apparatus to determine permeability of rock formations adjacent a borehole Aug. 16, 1988
4718027 Dynamically adjustable linear data discriminator Jan. 5, 1988
4698791 Acoustic well logging method for improved amplitude data acquisition Oct. 6, 1987
4672588 Method for displaying acoustic well logging data by producing travel time stacks Jun. 9, 1987
4658383 Automatic gain control of digitized full trace acoustic signal in a borehole Apr. 14, 1987
4594691 Sonic well logging Jun. 10, 1986
4587641 Downhole fracture analysis May. 6, 1986
4524435 Method for determining the degree of change of material properties of underground strata Jun. 18, 1985
4495816 Process and system for analyzing discontinuities in reasonably homogeneous medium Jan. 29, 1985
4495605 Method for determining the dip angle of geological formations traversed by a borehole Jan. 22, 1985
4449208 Lithologic studies utilizing acoustic wave attenuation May. 15, 1984
4363112 Apparatus and method for determining the position of a gas-saturated porous rock in the vicinity of a deep borehole in the earth Dec. 7, 1982

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