Abstract: A seismic measurement system and a method of obtaining seismic measurements are described. The seismic measurement system includes a cable and a plurality of sensors disposed at a first interval along the cable. The plurality of sensors receives reflections resulting from a seismic source and each of the plurality of sensors receives the reflection corresponding with a particular subsurface location. The system also includes a controller to turn on a first set of the plurality of sensors and turn off a second set of the plurality of sensors based on an area of interest.

Abstract: An improved baseplate design is described that correct the flexure with a plurality of actuators mounted on top of the base plate. Sensors and a feedback circuit enables the detection of flexure and a corresponding compensating scheme to correct and/or prevent the flexure in order for the baseplate to complete couple with the ground for more accurate seismic survey.

Abstract: Computer-implemented method for determining optimal sampling grid during seismic data reconstruction includes: a) constructing an optimization model, via a computing processor, given by minu?Su?1s.t. ?Ru?b?2?? wherein S is a discrete transform matrix, b is seismic data on an observed grid, u is seismic data on a reconstruction grid, and matrix R is a sampling operator; b) defining mutual coherence as ? ? C S ? m ( log ? ? n ) 6 , wherein C is a constant, S is a cardinality of Su, m is proportional to number of seismic traces on the observed grid, and n is proportional to number of seismic traces on the reconstruction grid; c) deriving a mutual coherence proxy, wherein the mutual coherence proxy is a proxy for mutual coherence when S is over-complete and wherein the mutual coherence proxy is exactly the mutual coherence when S is a Fourier transform; and d) determining a sample grid r*=arg minr ?(r).

Abstract: Disclosed are methods of marine 3D seismic data acquisition that do not require compensation for winds and currents.

Abstract: The present disclosure provides methods of data acquisition and processing of seismic data that combines nodal survey design, especially sparse nodal surveys, with the hybrid gather processing methodologies.

Abstract: Methods of analyzing and optimizing a seismic survey design are described. Specifically, the sampling quality is analyzed as opposed to the overall quality of the whole survey. This allows for analysis of the impact of the offsets, obstacles, and other aspects of the survey on the sampling quality, which will improve the ability to compress the resulting data and minimize acquisition footprints.

Abstract: Methods of designing seismic survey and acquisition of seismic data with reduced noise using equally or optimally irregularly spaced sources or receivers are described. Specifically, prime number ratios for the station to line spacing is used to prevent harmonic leakage and other noise contaminations in the acquired seismic data.

Abstract: Improved methods of providing acoustic source signals for seismic surveying, wherein a plurality of signals can be easily separated from one another after data acquisition, wherein the source signals are not sweep based.

Abstract: The invention relates to recording seismic data with autonomous seismic data recorders in a pattern where the recorders are deployed in a compact geographical array having a low aspect ratio keeping the recorders closer to the seismic source trucks and requiring fewer total recorders. The recorders are deployed to cover an active listening patch and the seismic source trucks progress from shot point to shot point within a defined source path that provides for a pattern of recorder movements from behind the active listening patch to a location in front of the active patch.

Abstract: An improved baseplate design is described that correct the flexure with a plurality of actuators mounted on top of the base plate. Sensors and a feedback circuit enables the detection of flexure and a corresponding compensating scheme to correct and/or prevent the flexure in order for the baseplate to complete couple with the ground for more accurate seismic survey.

Abstract: Novel proppants, proppant mixes and proppant slurries comprising a diamagnetic polymeric proppant that exhibits induced paramagnetism in an AC field is used to prop hydraulic fractures, and the paramagnetism used to assess fracture width, depth, connectivity, branching and the like. Fracturing methods are also provided, together with fracture assessment and imaging methods.

Abstract: Improved methods of gather high fidelity vibratory seismic surveys for ZenSeis® systems wherein at least one optimal phase encoding schemes for surveys having 2-8 vibratory sources are disclosed. These encoding schemes can be hard coded into the source controller and will allow for quality data to be obtained on each survey. Further, the data will also have the best separation during inversion processing steps, leading to an optimal seismic survey.

Abstract: The invention relates to continuously or near continuously acquiring seismic data where at least one pulse-type source is fired in a distinctive sequence to create a series of pulses and to create a continuous or near continuous rumble. In a preferred embodiment, a number of pulse-type seismic sources are arranged in an array and are fired in a distinctive loop of composite pulses where the returning wavefield is source separable based on the distinctive composite pulses. Firing the pulse-type sources creates an identifiable loop of identifiable composite pulses so that two or more marine seismic acquisition systems with pulse-type seismic sources can acquire seismic data concurrently, continuously or near continuously and the peak energy delivered into the water will be less, which will reduce the irritation of seismic data acquisition to marine life.

Abstract: Systems and methods for generating seismic signal include using a conventional airgun array and specifically detunes the timing of the array so individual airguns are not fired at the same time and with their interacting bubbles form a unique composite pulse that can be separated by various means out of a seismic record to form the shotpoint. The advantage of this approach is a lower overall noise envelope in the water minimizing impact on the marine mammals and it allows multiple arrays to be fired in close spatial and timing proximity with minimal to no interference.

Abstract: Vibrators for producing seismic signals for use in oil and gas exploration are equipped with segmented base plates, each segment being independently controlled and activated. The use of an array of base plate segments allows the individual segments of the array to be activated in a particular pattern, thus generating S-waves and other unconventional wave patterns for seismic use.

Abstract: The invention relates to a seismic acquisition process where multiple seismic sources are used to acquire seismic energy using encoding so that all of the sources may deliver seismic energy at the same time where the sweeps are arranged to be back to back with no listen time and wherein a pseudo listen time that is uncontaminated is created in the composite data record. After the listen time is created, the composite data may be source separated for further processing and analysis.

Abstract: The invention relates to acquiring seismic data from the earth using geophones that are tuned to have differing frequency sensitivity ranges. The differing frequency sensitivity ranges cover a broader effective frequency range so that low frequency energy and high frequency energy are less attenuated in the raw data record. Two separate geophones would be used at the same node and three or more geophones may be used in combination at each node. When three or more geophones are used in combination, each may have a separate but overlapping frequency sensitivity range or two or more of the geophones may have the same frequency range sensitivity.

Abstract: The invention relates to seismic imaging where complex geologies are likely to create data that is confusing or ambiguous for a conventional matrix of acquisition source points and receiver locations. With some understanding of the geological substructure, the acquisition source points and receiver locations that optimize the imaging may be found by using a reciprocal two-way wave equation propagation method coupled with a quality geologic model. With this, the acquisition source points and receiver locations that optimize the imaging may be selected and used to better resolve the substructure and avoid the inclusion of data that obscures understanding of the substructure.

Abstract: A method of performing notch compensation and a system to perform notch compensation for a first seismic streamer are described. The method includes disposing the first seismic streamer at a first depth, where the seismic streamer includes a first set of sensors to receive reflections resulting from a seismic source, the reflections indicating a notch at a frequency. The method also includes disposing a second seismic streamer at a second depth, the second depth being less than the first depth and the second seismic streamer including a second set of sensors to receive reflections resulting from the seismic source. The method further includes processing the reflections received by the first set of sensors and the second set of sensors together to derive the match filter, and applying the match filter to the reflections received by the first set of sensors of the first seismic streamer to compensate for the notch.

Abstract: The invention relates to a process for two separate seismic crews to work in proximity to one another that would otherwise require expensive time sharing where one crew is a conventional seismic acquisition system and the other is a phase encoded seismic acquisition system. Typically, each recording system would receive seismic energy from the other that neither data set would be very useful. The invention primarily envisions some collaboration between the crews where each adjusts its sweeps to comprise a different time duration so that the energy the other crew's sources are distinguishable in the data set and easily eliminated therefrom. Distinctions may be further enhanced when the two crews use construct their sweeps so that each crew has a distinctly different start frequency and a distinctly different end frequency.