Shell Oil Comapny

University of California

Andrey Victorovich Bakulin

Albena Alexandrova Mateeva

Rodney William Calvert

Valeri A Korneev

Kurang Jvalant Mehta

Method of imaging seismic data recorded using a set of seismic receivers positioned to receive seismic responses from a subsurface formation upon activating a seismic source. The seismic responses are direction-sensitive responses. A virtual signal received by receiver k from the virtual source at the position of receiver m is determined by processing involving cross correlating at least part of the responses of a receiver m with at least part of the responses of a seismic receiver k. Part of direction-sensitive responses or part of the virtual signal that contains a component of the wave field at receiver m traveling in a first direction and part of the direction-sensitive responses or part of the virtual signal that contains a component of the wave field at the receiver k traveling in a second direction may be removed.

Method of imaging of seismic data involving a virtual source, methods of producing a hydrocarbon fluid, and a computer readable medium

A seismic velocity profile in a region of interest in a subsurface formation is determined using at least the following steps.

Method of determining a seismic velocity profile

The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tube-wave () is initiated in a source well () by a source (), travels in the source well (), is coupled to a geological feature (), propagates () through the geological feature (), is coupled back to a tube-wave () at a receiver well (), and is and received by receiver(s) () in either the same () or a different receiving well (). The tube-wave has been shown to be extremely sensitive to changes in reservoir characteristics. Tube-waves appear to couple most effectively to reservoirs where the well casing is perforated, allowing direct fluid contact from the interior of a well case to the reservoir.

Growing community of inventors

Houston, TX, United States of America

Andrey Victorovich Bakulin