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| Number | Title | Issue Date |
| 8077547 | Method and apparatus for seismic exploration The disclosure identifies method and apparatus for seismic exploration which may be used to provide improved positioning of land-based seismic sources in an array. Also described are methods which make use of the improved positioning to allow, in some examples, impr... | 12/13/2011 |
| 7724608 | Passive reflective imaging for visualizing subsurface structures in earth and water A system and method is provided that uses signals from a plurality of seismic sensors to define an acoustic lens for subsurface imaging. More specifically signals provided by an array of sensors/geophones may be utilized to form an acoustic lens that can be focused ... | 05/25/2010 |
| 6961673 | Measuring discontinuity in seismic data Various methods for measuring continuity and discontinuity of a seismic data set. One method embodiment includes: a) detecting seismic energy with an array of detectors; b) converting detection signals from the array of detectors into data representing one or more a... | 11/01/2005 |
| 6944095 | Terrestrial seismic acquisition process and apparatus, in particular for a vertical seismic acquisition A method for the acquisition of seismic signals, in which at least two sources of the air gun type are placed within one or more vertical holes extending in the subsoil and in which one or more seismic sensors record the seismic propagated from said sources, that ar... | 09/13/2005 |
| 6920084 | Offset transformation to zero dip that preserves angle of incidence A method and apparatus for compensating acquired seismic data for the presence of dipping events are disclosed. The method includes migrating the acquired, unstacked seismic data; and spatially mapping the migrated seismic data to correct their respective offsets wh... | 07/19/2005 |
| 6788619 | Concentrating seismic energy in a selected target point in an underground formation Providing a set of seismic sources in a focusing array to enable concentrating seismic energy in a selected target point (k) in an underground formation, by performing a standard seismic survey of the underground formation using a set of impulsive seismic sources an... | 09/07/2004 |
| 6028822 | Configuration of source and receiver lines for 3-dimensional seismic acquisition A method for performing a seismic survey with even fold. An inline direction and a crossline direction are selected. Seismic signals are generated at a plurality of source locations positioned along one or more source lines. The source locations are subst... | 02/22/2000 |
| 5640368 | Migration velocity analysis using limited-aperture and monte carlo migration Disclosed is a method for efficiently and accurately determining subsurface velocities for use in migration of seismic data. The method calls for restricting the number of traces considered to those lying upon that portion of the Kirchhoff summation curve... | 06/17/1997 |
| 5535176 | Method and system for sensing with an active acoustic array A method and system provide for the sensing of objects under water where the acoustic energy is suitably focused or directed so that reverberation returns are minimized. A vertical source array of adjustable acoustic sources is located in the water body, ... | 07/09/1996 |
| 5241514 | Identifying, characterizing, and mapping of seismic noise The present invention provides novel methods for identifying, characterizing and mapping seismic noise as an aid in evaluating and enhancing seismic data. In particular, an array of seismic receivers can be beam steered to sense seismic energy arriving fr... | 08/31/1993 |
| 4987561 | Seismic imaging of steeply dipping geologic interfaces A method for determining the location of steeply dipping subsurfaces includes acquiring seismic reflection data, identifying select data which has characteristics indicating that the acoustic pulses which it represents have been reflected from a substanti... | 01/22/1991 |
| 4878205 | Method of analyzing the structure of a medium, particularly useful for seismic prospecting Method of analyzing the structure of a medium by means of waves reflected by inner interfaces, comprises: (a) generating multiple coverage data represented by traces corresponding to a plurality of source-receiver pairs distributed according to an asymetr... | 10/31/1989 |
| 4866659 | Method for selection of mining and drilling sites using synthesized three dimensional seismic data A method is disclosed for converting seismic data obtained at known points to synthesized seismic traces obtainable at arbitrarily selected points. Two dimensional seismic data are converted to dense three dimensional data with the aid of a programmed com... | 09/12/1989 |
| 4847813 | Method for extending the lateral subsurface coverage in VSP surveys In a VSP survey, the subsurface coverage of the bounce points of primary reflections is limited to one-half the offset between a borehole and a seismic-source point. The subsurface coverage may be extended by use of selected multiply-reflected wavefield a... | 07/11/1989 |
| 4672545 | Method and apparatus for synthesizing three dimensional seismic data Method and apparatus are disclosed for converting seismic data obtained at known points to synthesized seismic traces obtainable at arbitrarily selected points. Two dimensional seismic data are converted to three dimensional data with the aid of a program... | 06/09/1987 |
| 4644508 | Method and apparatus for selectively reinforcing detected seismic waves A method and apparatus are disclosed for selectively reinforcing an acoustic wave traveling in a first predetermined direction in a body of water while attenuating an acoustic wave traveling in a second opposite direction. The output signals from vertical... | 02/17/1987 |
| 4509149 | Directional long array for logging vertical boundaries A logging sonde has directivity control of multiple sources and receivers in linear arrays. Each of the sources produces acoustic pulses which are delayed by a time delay between the sources to direct acoustic energy at an angle such that the resulting ac... | 04/02/1985 |
| 4405999 | Method for collecting and generating composite trace signals with improved signal to noise ratios Arrays of seismic wave sources and seismic wave sensors are towed over an area to be refraction surveyed in such a way that source and sensor geodetic positioning is duplicated during successive source firings. A plurality of traces having these same sour... | 09/20/1983 |
| 4403313 | Process and an apparatus for seismic geophysics with processing by focuses The invention relates to seismic prospecting of the sub-surface. At least two adjacent focuses F and F', at least one reflecting interface H and directions such as (D1) and (D2) are selected in the sub-surface. A seismic trace, from which... | 09/06/1983 |
| 4363113 | Seismic exploration with simulated plane waves A method of seismic exploration by which substantially plane or substantially cylindrical seismic energy waves are simulated by combining reflectional signal traces of conventional spherical seismic waves. Seismic sources and receivers are established in ... | 12/07/1982 |
| 4357689 | Seismic data gathering method This specification discloses a method of seismic exploration and in particular a method of generating and gathering field seismic data. Paths or seismic lines are traversed across the earth or water layers overlying the earth and over subsurface earth for... | 11/02/1982 |
| 4346462 | Seismic prospecting method providing for the determination of the flank dip of subterranean layers and device for carrying out the same Seismic prospecting method for determining the flank dip of subterranean layers with respect to the plane of a seismic profile, comprising sequentially transmitting acoustic waves with different directivity diagrams, recording the corresponding reflected ... | 08/24/1982 |
| 4259733 | Multi-dimensional seismic imaging Seismic traces synthesizing the response of subsurface formations to a cylindrical or plane wave are obtained for a succession of shotpoint locations along a seismic line of profile. The traces obtained are then wavefront steered and the steered traces an... | 03/31/1981 |
| 4254480 | Frequency independent directionally sensitive array in seismic surveying A novel array of vertically and horizontally spaced hydrophones is shown which is capable of high ratio of desired signal to noise because of good directional sensitivity when used with any seismic source. Alternatively, a novel directionally sensitive ar... | 03/03/1981 |
| 4048612 | Exploration system for cross-steering and stacking seismic data using a sawtooth traverse of shot points centrally spaced between at least a pair of linear detector spreads In areal seismic exploration, seismic impulses are generated successively at locations spaced along a centrally located, asymmetic sawtooth shot-point line which regularly crosses a median line coincident with the line of survey. Seismic waves resulting f... | 09/13/1977 |
| 3934220 | Method of seismic exploration for penetrating diffraction barriers and/or surveying beneath obstacles A number of seismic detectors are located in a two-dimensional array on the surface of the earth, either on land or at sea. One or more seismic disturbances are produced in the vicinity of the seismic detectors at points located to produce sampling of var... | 01/20/1976 |
