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Geophysics/Geophysics-well log correlation


Dear Sir,
I am assigned to work on well correlation with petrel software.I have following queries .Kindly answer them.
1)what are the basic rules to keep in mind when I start well correlation.I know that a GR log and SP or resistivity along with Lithology log are needed ,but what exactly I need to consider in these logs ,is it only the lithology in different wells that needs to be considered or should I even need to consider the Geologocal time(age)  of the corresponding lithology in different wells?
2)I am also assigned to work on coming up with an algorithm of automating the well correlation.So what area should I focus while doing the automation part.Kindly introduce me to the well correlation through some good books and links .

I am very much thank ful to you for your valuable answers on Q-factors and Amplitude spectrum.They really helped me to understand the concept very well.Thank you very much for the good work you are doing .

Dear Jeevan,

I will go brief.

1) You need to clarify the objectives prior to correlation. This means that you need to know what type of correlation are you going to establish. Lithostratigraphic, chronostratigraphic, sequence stratigraphic or allostratigraphic. This is because stratigraphy is a n-set of solutions.

You better start with GR/SP/RHOB/DT logs to correlate strata. If needed, you may use the resistivity logs, which mainly suggest fluids in a rock.

You should try to consider the relative geologic time frame to constrain the correlation.

Plus, you should also know the type of basin, distance, and depositional setting per zone that you are correlating.

2) Pattern recognition, trend surface analysis, or integration.

You may see INPEFA analysis, which is a log correlation method built in CycloLog.

Glad to hear your feedback.




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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.

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Position Holder in Academics.

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