# Amplitude

## Subclass of:

## 367 - Communications, electrical: acoustic wave systems and devices

## 367014000 - SEISMIC PROSPECTING

## 367037000 - Land-reflection type

## 367038000 - Signal analysis and/or correction

### Patent class list (only not empty are listed)

#### Deeper subclasses:

Class / Patent application number | Description | Number of patent applications / Date published |
---|---|---|

367047000 | Amplitude | 13 |

20130286781 | Method and Apparatus for Selective Seismic Detection of Elongated Targets - A seismic wave source and sensing system coupled to the surface of an elastic wave propagation medium has a seismic wave source transducer having a preferred axis of vibration oriented horizontally on the surface of the elastic wave propagation medium. A seismic wave sensing transducer has a preferred axis of vibration response oriented horizontally on the surface of said elastic wave propagation medium such that said sensing transducer is capable of detecting dynamic particle motions and displacements of SH waves. An arrangement of the source and sensing transducers is provided on the surface of the elastic wave propagation medium. A recording system capable of acquiring and storing reflected SH wave signals detected by the sensing transducer, wherein the recorded signals represent reflections from contrasting physical properties within the elastic wave propagation medium to provide preferential detection of elongate subsurface targets such as utility pipes, conduits, and other similar object. | 10-31-2013 |

20130033961 | Correcting Time Lapse Seismic Data for Overburden and Recording Effects - Time lapse or 4D seismic data are corrected for geologic overburden and seismic recording system effects. The data from a survey at one time of interest is processed within a selected frequency band and the reservoir level is normalized by the overburden. The results are used to extract reservoir amplitudes from the data of that same survey. Frequencies where overburden signal-to-noise ratios vary dramatically between time lapse surveys may then be avoided in processing of data from the area of interest. | 02-07-2013 |

20110085420 | METHOD OF AND APPARATUS FOR EXPLORING A REGION BELOW A SURFACE OF THE EARTH - A passive method for exploring a region below the surface of the earth. The method comprises using a single sensor located in turn at a plurality of locations to obtain seismic data obtained by recording ambient seismic interface waves in a frequency range whose lower limit is greater than 0 Hz, and whose upper limit is less than or equal to substantially 1 Hz. The data are processed so as to obtain a measure of the energy in a frequency band within the frequency range. For example, the seismic data may be filtered and may be subjected to amplitude normalization before being transformed into the frequency domain. The energy measure may then be calculated by integrating the spectrum in the frequency domain over a desired frequency range. The resulting calculated energy provides information about the region of the earth being explored. | 04-14-2011 |

20130135967 | METHOD AND SYSTEM FOR DETECTING GEOMETRY VARIATIONS OF SEISMIC REFLECTIONS - A method, system and a computer readable medium to compute geometric reflectivity enhancement (GRE) distributions based on seismic data are disclosed. The GRE distributions may be derived from absolute values of a seismic trace amplitude and a quadrature signal obtained by computing the Hilbert transform of the seismic trace amplitude. The derived GRE distributions preserve zero crossings and peaks of the seismic amplitude data. | 05-30-2013 |

20110182143 | Technique and Apparatus for Seismic Data Quality Control Using Non-Linear Regression Analysis - A technique includes receiving seismic data acquired in a seismic survey. The technique includes determining a geophysical trend of trace amplitudes indicated by the seismic data based on non-linear regression and performing quality control analysis on the seismic data based on the determined trend. | 07-28-2011 |

20110182142 | Technique and Apparatus for Seismic Data Quality Control - A technique includes receiving seismic data acquired in a seismic survey and performing quality control analysis on a given trace indicated by the seismic data. The quality control analysis includes selectively accepting or rejecting the given trace based on a median trend of other trace amplitudes determined from traces associated with sensor positions near a sensor position associated with the given trace. | 07-28-2011 |

20110273961 | Q Tomography Method - Method for reconstructing subsurface Q models ( | 11-10-2011 |

20110286306 | DETERMINING ORIGIN AND MECHANISM OF MICROSEISMIC EVENTS IN THE EARTH'S SUBSURFACE BY DEVIATORIC MOMENT INVERSION - A method for locating origin time, origin location and source mechanism of seismic events occurring in a selected volume of subsurface formations includes calculating a travel time from each possible origin location to each of a plurality of seismic receivers disposed above the volume in a selected pattern. A signal amplitude is measured by each receiver for each possible origin time at each possible origin location. The signal amplitude is determined from the continuously recorded data by calculating travel time delays for each possible origin location and origin time. The deviatoric moment tensors are determined from the signal amplitudes by moment tensor inversion restricted to deviatoric moment tensors. A norm for each deviatoric moment tensor is generated. An origin time, origin position and source mechanism of a seismic event is determined wherein any norm exceeds a selected threshold. | 11-24-2011 |

20090028000 | METHOD AND PROCESS FOR THE SYSTEMATIC EXPLORATION OF URANIUM IN THE ATHABASCA BASIN - A method for the identification of metallic deposits in a rock formation is provided. The method for the identification includes the steps of providing an acoustic source for generating frequencies to produce acoustic waves, arranging at least one geophone optimized to detect the frequencies and oriented to enhance reflection planes from faults and fractures associated with an ore body in a rock formation and locating the acoustic source and at least one geophone in at least one shallow bore hole beneath unconsolidated surface material of the rock formation. The method further includes the steps of directing the acoustic waves to an underlying rock formation to generate seismic reflection data and processing the seismic reflection data by altering the frequency and the amplitude to identify unique seismic attributes that allow detection of at least one metallic deposit or ore body in the rock formation. | 01-29-2009 |

20090034367 | DYNAMICALLY ALLOCATING DIFFERENT NUMBERS OF BITS TO WINDOWS OF A SERIES REPRESENTING A SEISMIC TRACE - To process seismic data, a set of data values representing a seismic trace is received, and amplitudes of data values associated with plural groups in the set are analyzed. Different numbers of bits are dynamically allocated to at least some of the groups of the set according to the analyzing. | 02-05-2009 |

20090003131 | ENHANCED OIL RECOVERY USING MULTIPLE SONIC SOURCES - A method and apparatus control a plurality of sonic sources to generate sound waves within at least one opening of an item. The “item” can comprise almost anything that has a percolation path (a path where solid particles are to be separated from liquid particles), such as the ground, aggregates, porous structures, porous materials, and a semi-solid structure. By controlling the sonic sources, the method transmits the sound waves to the percolation path. Further, the method regulates the amplitude and frequency of the sound waves such that the liquid particles oscillate out of phase with the solid particles. The method also regulates the phases of the sound waves generated by the different sonic sources so as to control locations within the percolation path where the liquid particles oscillate out of phase with the solid particles. | 01-01-2009 |

20090052279 | METHOD AND SYSTEM FOR DETERMINING AZIMUTH PARAMETERS FOR SEISMIC DATA PROCESSING - A method and system determines optimum azimuth parameters for seismic data processing. The method includes selecting a range of azimuth parameters, the azimuth parameters indicating the range of magnitudes and directions, each pair of azimuth parameters indicating a particular magnitude and a particular direction. The method further includes generating a plurality of seismic gathers wherein a seismic gather is generated from each pair of azimuth parameters, each seismic gather including a plurality of seismic data traces. The method further includes generating a plurality of seismic gathers for a plurality of imaging locations and a plurality of depths, each seismic gather containing a plurality of seismic data traces. The method further includes determining the coherence amplitude of each gather. The method further includes determining the gather having the optimum coherence amplitude, and selecting the azimuth parameters associated with the gather having the optimum coherence amplitude. | 02-26-2009 |

20090010104 | METHODS AND SYSTEMS FOR PROCESSING MICROSEISMIC DATA - Methods and systems for processing microseismic waveforms. The methods and systems provide determining a measure of waveform fit in the frequency-domain comprising constructing, in the frequency-domain, at least one of an amplitude misfit functional and a cross phase functional between arrivals; and estimating source parameters and/or model parameters. | 01-08-2009 |