Schlumberger

Technical Paper: Thin Laminated Gas Bearing Sequences, Gas Finder a New Approach of Petrophysical Evaluation in Mexico

Society: SPE
Paper Number: 74443
Presentation Date: 2002
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Abstract

Traditional petrophysical well evaluation is able to show an integrated analysis where the log information is transformed into water, oil, and gas saturation curves along a specific interval of a well. However, this method is not able to predict how much the production from those intervals could be.

This new methodology uses the same approach, but magnetic resonance and pressure data are integrated. Magnetic resonance discriminates between irreducible and moveable fluid saturation and also indicates the higher permeability zones, so it is used as a guide for the point selection for the MDT modular formation dynamics tester.

In low-resistivity reservoirs, the new technology will allow the engineer to discriminate if the water is going to flow or not, maximizing the reservoir potential. Having defined the lithology, pressure, permeability, fluids distribution, and fluids saturation a synthetic production flow profile log can be generated for each selected interval enabling selection of the best possible intervals or overlooked zones and, therefore, maximizing the final production of the well.

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