Inova Gmbh

Thomas F Phillips

Zhouhong Wei

Bernard Maechler

Igor Samoylov

Keith Radcliffe

Ruru Chen

Russ Jay Ewert

A seismic source signal apparatus for generating a seismic source signal may include a seismic source component for coupling a reaction mass to the earth; a controllable valve operatively connected to the seismic source component; and a controller controlling the controllable valve with a primary control signal generated by using a model of a response of the controllable valve over a selected operating range. The model is used to reduce nonlinearity in flow versus displacement response of the controllable valve.

Devices and systems for controlling harmonic distortion in seismic sources

A method of performing a seismic sweep determining a user-defined force at a frequency using user defined inputs; determining a maximum force at the frequency using sweep parameters; and using the maximum force to drive a seismic source if the user-defined force is greater than the maximum force.

Method of seismic vibratory limits control at low frequencies

A method of controlling seismic data acquisition may include sending a first message to place a plurality of energy sources into an operating mode; sending a second message to place at least one of plurality of energy sources into a non-operating mode; and sending a third message from at least one energy source to a controller.

Method of seismic source independent operation

A method of controlling a seismic vehicle may include estimating at least one orientation parameter for the seismic vehicle and controlling at least one operating parameter in view of the estimated orientation parameter(s). In non-limiting arrangements, the control may relate to re-positioning the seismic vehicle, adjusting value of a hold-down force or target drive force, and/or updating a seismic data acquisition database.

Method of optimizing seismic vibrator output force

A method of controlling seismic data acquisition includes synchronizing a sampling rate of at least one node configured to acquire seismic data with a GPS timing signal from a first GPS seismic device; and delaying sending a start signal to one or more seismic sources, the delay being with reference to a GPS timing signal from a second GPS device.

Method of seismic source synchronization

A method of performing a seismic sweep includes forming a composite force profile; constructing a target seismic frequency sweep using the composite force profile; and operating a seismic source using the constructed target frequency seismic sweep.

Seismic frequency sweep enhancement

A seismic vibrator has a baseplate composed at least partially of a composite material. The baseplate has a body composed of the composite material and has top and bottom plates composed of a metallic material. The top plate supports isolators for isolating the vibrator's mass and frame from the baseplate. Internally, the composite body has a central structure to which couple stilts for supporting the mass and a piston for the vibrator's actuator. A lattice structure surrounds the central structure. This lattice structure has radial ribs extending from the central structure and has radial ribs interconnecting the radial ribs.

Seismic vibrator having composite baseplate

A vibrator-coupled ground filter improves seismic data recorded during a seismic operation. This filter is based on a ground model that takes into consideration the vibrator system, the coupling system between the baseplate and captured ground, and the coupled ground system. Using acceleration data from the baseplate and the reaction mass, the ground model can be used to derive particular variables for the ground model to help characterize the system. Using the derived variables in a ground filter, the recorded seismic data can be corrected to remove errors in the trace data produced by typical assumptions.

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Richmond, TX, United States of America

Thomas F Phillips