Westerngeco L.l.p.

Pieter Leonard Vermeer

Kambiz Iranpour

David Fraser Halliday

Jon-Fredrik Hopperstad

Claudio Bagaini

Johan-Fredrik Synnevaag

Timothy James Dean

Methods and systems are disclosed to enhance surveying techniques. In one embodiment, a virtual response is estimated that corresponds to energy propagated within a subsurface region between a virtual source and a virtual source estimation receiver, wherein the subsurface region corresponds to a survey zone including: a plurality of receivers deployed within the survey zone, a first subzone having at least one actual source, a second subzone within the first subzone; the virtual source is a first receiver disposed in the second subzone; and the virtual source estimation receiver is a second receiver.

Methods and computing systems for survey data enhancement

An embodiment of the invention includes combining pseudorandom sweeps with an independent, or nearly independent, survey acquisition technique. Targeted design of pseudorandom sweeps can direct the majority of cross-correlation noise to lie outside key time-lags of the record (i.e., windows of interest). Embodiments of the invention are described herein.

Sweep sequence determination for overlapping sweeps

A seismic source arraycomprises a plurality of seismic sourcearranged about a central point of the source arrayin such a way that an imaginary circle drawn with said central point at its center, and containing all of said seismic sources, can be divided into at least three whole sectors each of which contains a substantially identical arrangement of seismic sources

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Horsham, United Kingdom

Pieter Leonard Vermeer