High-resolution ultrasonic measurements as proxies to resolve clastic reservoir heterogeneity in a salt-cemented gas reservoir

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Filomena C, Stollhofen H, van Ojik K
Zeitschrift: Aapg Bulletin
Verlag: American Association of Petroleum Geologists
Jahr der Veröffentlichung: 2012
Band: 96
Seitenbereich: 1197-1209
ISSN: 0149-1423
Sprache: Englisch


Abstract


Petrophysical properties and their heterogeneity within sandstone bodies are key parameters in the evaluation of hydrocarbon and geothermal reservoirs. However, common tools applied to constrain the porosity distribution pattern in borehole cores are commonly time consuming and destructive, or suffer from a resolution limited to the meter to decimeter scale. We examine the applicability of nondestructive high-resolution sonic (HRS) logging of well core sections in the ultrasonic frequency range as a method providing porosity proxy data at the centimeter scale in a clastic sedimentary sequence. The middle Soiling Sandstone Member, a gas-bearing reservoir offshore from the Netherlands, is used as a test sample. It consists almost entirely of clean, cross-bedded to massive eo-lian dune and dry sand-flat deposits that are salt plugged to variable degrees. Plots of HRS logging data versus core-plug porosity values show a positive linear relationship that develops the highest coefficient of determination (R = 0.86) in structureless eolian dune sands, most probably caused by the lack of bedding-related anisotropics there. Once calibrated for a particular facies type, this correlation enables the calculation of porosity proxy data from sonic transit time values, acquired at centimetric steps. High-resolution sonic logging thus contributes a reliable and time-efficient, highly spatially resolving quantification of reservoir heterogeneities at centimeter scale and turns out to be a suitable tool for the nondestructive in-situ detection of high-porosity zones in otherwise uniform sandstone successions. Moreover, plots of closely spaced HRS logging-derived porosity proxy data significantly improve interpolation between single, wider spaced core-plug porosity data points. Copyright © 2012. The American Association of Petroleum Geologists. All rights reserved.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Filomena, Claudio Dr.
Lehrstuhl für Geologie (Exogene Dynamik)
Stollhofen, Harald Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)


Einrichtungen weiterer Autorinnen und Autoren

Shell Global Solutions International B.V.


Zitierweisen

APA:
Filomena, C., Stollhofen, H., & van Ojik, K. (2012). High-resolution ultrasonic measurements as proxies to resolve clastic reservoir heterogeneity in a salt-cemented gas reservoir. Aapg Bulletin, 96, 1197-1209. https://dx.doi.org/10.1306/01021211100

MLA:
Filomena, Claudio, Harald Stollhofen, and Kees van Ojik. "High-resolution ultrasonic measurements as proxies to resolve clastic reservoir heterogeneity in a salt-cemented gas reservoir." Aapg Bulletin 96 (2012): 1197-1209.

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