--> ABSTRACT: Permeability Evaluation of Zubair Formation Using Well Logs, by Alameedy, Usama S.; #90141 (2012)
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Previous HitPermeabilityNext Hit Evaluation of Zubair Formation Using Well Logs

Alameedy, Usama S.*1
(1) Wireline & Perforating Services, Halliburton - Drilling & Evaluation Division, Basrah, Iraq.

This study is focused on the evaluation of formation Previous HitpermeabilityNext Hit for a sandstone reservoir in three southern Iraqi oil fields which are Zubair, North and South Rumaila at Zubair formation. Methods of determing Previous HitpermeabilityNext Hit form logs are reviewed. A case history is presented showing how an optimum empirical relationship to predict Previous HitpermeabilityNext Hit can be developed, with commonly available core and log data for a particular formation and area. Verifiable and accurate Previous HitpermeabilityNext Hit prediction from well logs in a well with no core measurement data are presented by improved log derived Previous HitpermeabilityNext Hit relationship. Sandstone grain size and sorting, and hence Previous HitpermeabilityNext Hit are often related to the amount of interstitial silt and shale and this in turn may be reflected in the natural radioactivity. Because of this, in some areas Previous HitpermeabilityNext Hit of sandstone can be estimated from carefully calibrated gamma ray curves as the proposed relationship (√k=1/2 Exp(4.5φ2+4 (1-IG))). For the South Rumaila and Zubair fields it is found that the Previous HitpermeabilityNext Hit is a function of porosity, irreducible water saturation and volume of shale. It is also found that the correlation coefficient between predicted and observed Previous HitpermeabilityNext Hit for the above function is increased by taking the square root of the Previous HitpermeabilityTop (√k).

 

AAPG Search and Discovery Article #90141©2012, GEO-2012, 10th Middle East Geosciences Conference and Exhibition, 4-7 March 2012, Manama, Bahrain