Pgs Americas, Inc.

Other

Pgs Seres As

Yaohui Zhang

An improved static alignment and an improved dynamic alignment are combined in a laser beam method and system that provides instantaneous and continuous information feedback to a golfer to allow the real time correction of defects arising from a golfer's stance, head movement, body movement, golf club alignment, and golf club swing.

Laser beam method and system for golfer alignment

A method of updating velocity whereby corresponding reflections are identified from P-P and P-S near-offset waves received from a seismic source and reflected by a subsurface layer to form P-P and P-S depth consistent image gathers. A joint velocity inversion in depth is performed on the P-P and P-S depth consistent image gathers to estimate a vertical depth z , vertical P-wave velocity v , and vertical S-wave velocity v of the subsurface layer. An isotropic depth migration of P-P depth consistent image gathers is determined based upon the depth z , P-wave velocity v , and S-wave velocity v to estimate a vertical isotropic depth z of the subsurface layer. Anisotropic parameters &dgr; and &sgr; are calculated based upon the depth z , P-wave velocity v , and S-wave velocity v . The above steps are repeated, beginning with the joint velocity inversion, until the P-wave velocity v and S-wave velocity v are substantially unchanged.

Seismic velocity update for anisotropic depth migration

A method is disclosed for determining compressional (P) wave and shear (S) wave velocities from seismic data acquired using multiple component receivers. The method includes estimating interval velocity of P waves from earth's surface to a first reflector from P wave arrivals in the seismic data. A interval ratio of P wave to S wave velocity is estimated from earth's surface to the first reflector from P-S wave arrivals in the seismic data. An S wave interval velocity is estimated from the estimated P wave interval velocity and interval ratio. A depth is determined from the earth's surface to the first reflector using each of the P wave and S wave estimated interval velocities, the depths to the first reflector estimated using each of the P wave and S wave estimated interval velocities are balanced.

Method and system for determining P-wave and S-wave velocities from multi-component seismic data by joint velocity inversion processing

A method and device for processing a seismic survey data set including: an actual source location, an actual receiver location, and an actual reflection event location is provided. The actual source location and actual receiver location are over a first layer having a first layer velocity and a first layer ray parameter, and over a second layer having a second layer velocity different from the first layer velocity and a second layer ray parameter different from the first layer ray parameter. The actual reflection event location is located below the first layer. The method comprises: providing the first layer velocity; providing the second layer velocity; providing the first layer ray parameter; providing the second layer ray parameter; determining a correction factor for the position of a ray path end dependant upon the first and second layer velocities and the first and second layer ray parameters; and applying the correction factor to the ray path end, wherein a ray path-corrected ray path end is provided. The ray path end comprises a member of the group consisting of: the actual source location, the actual receiver location, and the actual reflection event location. The ray path corrected ray path end comprises a member of the group consisting of: the ray path corrected source location, the ray path corrected receiver location, and the ray path corrected reflection event location.

Growing community of inventors

Katy, TX, United States of America

Yaohui Zhang