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Energy Sources, Part A: Recovery, Utilization, and Environmental Effects Volume 33, 2010 - Issue 4
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Original Articles

NMR Measurements and Determination of Rock Petrophysical Properties and Lithofacies (Naricual Formation, Eastern Venezuelan Basin)

G. Márquez Department of Mining, Mechanical and Energetic Engineering, University of Huelva, Palos de Fra., Huelva, Spain
,
M. R. Bencomo School of Environmental Engineering, Experimental University of Caribbe, Catia La Mar, Vargas, Venezuela
,
A. Requena Department of Mining, Mechanical and Energetic Engineering, University of Huelva, Palos de Fra., Huelva, Spain
&
J. C. Fortes Department of Mining, Mechanical and Energetic Engineering, University of Huelva, Palos de Fra., Huelva, Spain
Pages 335-343 | Received 03 Mar 2009, Accepted 10 May 2009, Published online: 15 Nov 2010
 
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Abstract

This research studies the petrophysical properties and lithofacies of the Naricual Formation (Venezuela) through the nuclear-magnetic resonance measurements of 12 lithologically complex sandstone core plugs from well FGB-1. Bulk volume irreducible index, free fluid index, critical water saturation, and other properties were determined. NMR estimates of permeability were derived from T2 distributions using a modified Timur-Coates Free Fluid model. The results showed that the values of the novel FFI0.9/BVI ratio covered five ranges depending on the lithofacies of each rock in the Naricual Formation. Last, we conclude that NMR technology is an effective tool for the determination of rock facies.

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