Schlumberger Technology Corporation

Baker Hughes Corporation

Jitendra S Gulati

Emmanuel Coste

John Richard Tulett

Xiaomin Zhao

Min Lou

Walter Scott Leaney

Francis D Doherty

Jakob Haldorsen

A technique facilitates performance of seismic profiling, such as three-dimensional vertical seismic profiling. A downhole acquisition system is provided with acoustic receivers designed to receive acoustic source signals. The firing of acoustic source signals is synchronized with the downhole acquisition system. Additionally, the firing of two or more acoustic source signals is controlled to provide simultaneous or nearly simultaneous timing of one acoustic source signal with respect to another acoustic source signal. A processing system is used to acquire and process a data stream of the initial shot and a data stream of the additional shot occurring simultaneously or nearly simultaneously.

Near-simultaneous acquisition for borehole seismic

Different values of at least one migration parameter are selected. An imaging technique is applied a plurality of times, where each application of the imaging technique uses a corresponding different one of the different values. Each application of the imaging technique produces a corresponding image of a subterranean structure. An aggregate of the images is computed to produce an output image of the subterranean structure.

Generating an image of a subterranean structure

First-order free-surface multiples recorded in VSP data or reverse VSP data are processed using VSP/CDP method to produce an image of the subsurface. This image produces a larger coverage than that obtained in 3-C 3-D processing of reflection data acquired in the VSP.

Extending the coverage of VSP/CDP imaging by using first-order downgoing multiples

Growing community of inventors

Houston, TX, United States of America

Jitendra S Gulati