Exxon Production Research Company

Exxonmobil Upstream Research Company

Vijay Khare

Craig S Calvert

Kenneth E Dahlberg

Leslie A Wahrmund

Reeshidev Bansal

Michael P Matheney

Alexander A Martinez

Method for aligning converted wave seismic reflection data (PS data) with conventional PP seismic reflection data so that both data types may be used to more accurately image the subsurface for hydrocarbon exploration or field development. Amplitude vs. angle (AVA) or amplitude vs. offset (AVO) attributes of PP and PS seismic data are identified and defined, which attributes are theoretically expected to be in phase and optimize seismic resolution in the data. In one embodiment of the invention, such attributes are calculated (), then the same horizons are identified in a series of PP attributes and in a series of PS attributes, then the second series is aligned with the first at the horizon locations (), then a time transfer function is generated and applied to the PS mode data (), and the aligned joint-mode data are inverted () using, for example, AVA attributes.

Using seismic attributes for data alignment and seismic inversion in joint PP/PS seismic analysis

A method of geophysical prospecting using seismic trace attribute analysis for formation characterization. More particularly, a method for selection of seismic traces which most accurately represent the subsurface formation in the area of a seismic survey is disclosed. In one embodiment, inflection-point interval analysis is used to account for effects of local surfaces.

Seismic attribute analysis using inflection point intervals

Method for determining formation properties from seismic attributes

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Sugar Land, TX, United States of America

Vijay Khare