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Dear Farrukh,

I need to do AVO and inversion. Could you tell me how to examine the pre-stack gathers are AVO friendly processing for preserving relative amplitude or not? Thank you very much.

Kind regards,


Dear Gerry,

If I do not understand your question correctly, please reply to this message.

There are various workflows to do AVO friendly processing such that the amplitude is preserved. The workflows mainly attempt to make the data compatible with Shuey's/Zoeppritz equations. These equations mainly utilize the deterministic approach such that a generalize well/geologic model is fitted in.

It is always worthy to do AVO cross-plotting after every processing step. One should try to evaluate qualitatively as well as quantitatively that the gradient is not altered during the processing. Optionally, one may plot gathers differences as a QC tool.

Further workflows can be found in the following readings:

Cambois, G., 1998, AVO attributes and noise: pitfalls of crossplotting, EAGE, Abstract 2-14.

Cambois, G., 2000, Can P-wave AVO be quantitative?, The Leading Edge, Society of Exploration Geophysicists, 19, 1246-1251.

Cambois, G., 2001, AVO processing: Myths and Reality, CSEG RECORDER, March 2001, 30-33.

Castagna, J. P., and Swan, H.W., 1997, Principles of AVO crossplotting, The Leading Edge, Society of Exploration Geophysicists, 17, 337342.

Ramos, A., 1998, AVO processing calibration, The Leading Edge, Society of Exploration Geophysicists, 8, 1075-155.


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Farrukh Qayyum


I would like to answer Geophysical questions with keen interest, specifically exploration related. I want to hear from users for their queries on exploration geophysics/geology. Especially in the discipline of Reservoir Characterization from seismic reflection data. The questions related to basics and interpretational applications would be most welcome. I can also answer queries related to sequence and/or seismic stratigraphy, geology, general geomorphology, seismic geomorphology and other relevant questions. I can not answer the questions related to gravity, magnetic, or resistivity surveying or question related to the fluid dynamics. Such categories are not related to my experience.


Over eight years in different services with additional case studies of Pakistan, China, Saudi Arabia, North Sea, Africa and Netherlands offshore.

dGB Earth Sciences, The Netherlands.


4D Wheeler Diagrams: Concept and Applications, Qayyum, F., P. de Groot, N. Hemstra, and O. Catuneanu, 2014, Geological Society, London, Special Publications, v. 404, p. SP404.1, doi:10.1144/SP404.1.

A Modern Approach to Build 3D Sequence Stratigraphic Framework Qayyum, F., Hemstra, N., and Singh, R., 2013, Oil and Gas Journal, vol.111, issue 10.

Dense sets of seismic horizons - A New Approach to Stratigraphic Interpretation Qayyum, F., Hemstra, N., and de Groot, P., 2013, Geophysical Corner, AAPG Explorer, September Issue, 68-69.

Developments and Future Trends in Wheeler Diagrams Qayyum, F., Catuneanu, O., de Groot, P., 2013, 75th EAGE Conference & Exhibition incorporating SPE EUROPEC, London, UK, June 2013.

HorizonCube and Wheeler Transform Generated, Stratal Packages Identified and Correlated on 7 Regional 2D Seismic Lines McDonough, K.J., Qayyum, F., Bouanga, E., and Pierard, C., Horn, B., Gross, J., Danforth, A., Sterne, E.J., Granath, J., AAPG Annual Convention & Exhibition, May 2013

On the horizon, de Groot, P., Qayyum, F., Oilfield Technology, January 2013.

Attributes play important role in seismic interpretation, de Groot, P., Qayyum, F., Hart's E&P Magazine, p. 31-34, October 2012.

From 2D to 4D Wheeler Diagrams, F. Qayyum, P. de Groot, and N. Hemstra, William Smith Meeting 2012, London.

Building a Sequence Stratigraphic Framework from HorizonCube and Well Data F. Qayyum, P. de Groot, J. Yasin 74th EAGE Conference & Exhibition, 2012

An old favourite, F. Qayyum and P. de Groot, Oilfield Technology, March 2012.

Using 3D Wheeler diagrams in seismic interpretation the HorizonCube method F. Qayyum, P. de Groot,N. Hemstra First Break 30 (3), 103-109,2012

Master in Philosophy with specialization in reservoir characterization by using Sequence Stratigraphy. And master in Geophysics with a case study of Punjab Platform.

Awards and Honors
Position Holder in Academics.

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