Shale porosity - What can we learn from different methods?

Andreas Busch*, K. Schweinar, N. Kampman, A. Coorn, V. Pipich, A. Feoktystov, L. Leu, A. Amann-Hildenbrand, Pieter Bertier

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


While the determination of porosity on sandstones is well established, porosities determined on shales are much less straightforward due to limited coring or inadequate pore preservation. Porosity in shale has an important control on many petrophysical, geomechanical and geochemical parameters of shales. Most of the porosity in shales is associated with small pore throat sizes, ranging in diameter from few up to about 100 nm. Pore throat sizes in carbonate or sandstone reservoir rocks are typically determined using mercury injection porosimetry (MIP). It is however well understood that MIP on shales underestimates porosity due to its limited accessibility. It is well known that using different methods for determining shale porosity results in different porosity values which is due to the different accessibility. Nonetheless, porosity is generally used as an absolute, intrinsic parameter without considering the method for determination. To address this issue we compare porosity, specific surface areas and pore volume distributions from fluid invasion and radiation methods on a total of 14 different Opalinus Clay samples recovered from the shaly facies at the Mont Terri underground laboratory in St. Ursanne, Switzerland.

Original languageEnglish
Title of host publication5th EAGE Shale Workshop
Subtitle of host publicationQuantifying Risks and Potential
PublisherEAGE Publishing BV
Number of pages5
ISBN (Electronic)9781510822887
Publication statusPublished - 2 May 2016
Event5th EAGE Shale Workshop: Quantifying Risks and Potential - Catania, Italy
Duration: 2 May 20164 May 2016


Conference5th EAGE Shale Workshop: Quantifying Risks and Potential

ASJC Scopus subject areas

  • Geophysics


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