Core–Image Logs Integration Approach to Enhance Reservoir and Production Characterization in Wells Drilled With Oil Base Mud, Pirital Field North Monagas Eastern Venezuela

German Gomez¹, Marla Garcia¹, Eduardo Rivas¹, Jorge Marchan², Carlos Jimenez², and Jesus Cedeño^2
1 Baker Hughes, El Tigre, Venezuela
² PDVSA, Punta de Mata, Venezuela

The area of study is located at Pirital Field, Maturin Basin Eastern Venezuela. In the past, vertical extrapolation of facies, defined by the integration of core, resistivity images and conventional log data, was only possible in wells which had been perforated with water base mud. The recent out coming of high definition resistivity image logs, acquired in wells drilled with oil base mud, has made possible the enhancement of the characterization of facies in large intervals of depth, inside the stratigraphic column, without having to cut many cores, at a great economical expense.

The application of statistical multidimensional methods in the integration of core data, resistive images and conventional log data allows the lateral extrapolation of productive facies becoming the root which permits a more precise definition of future locations.

This work focuses in the impact generated, in wells drilled with oil base mud, by the integration of core data, resistive images and conventional log data, to the reservoir characterization and further estimation of Production and Reserves at Pirital field located at Eastern Venezuela.