Classification of microporosity in carbonates

examples from Miocene carbonate reservoirs of Central Luconia, Offshore Sarawak, Malaysia

Md Habibur Rahman*, Bernard J. Pierson, Wan Ismail Wan Yusoff

*Corresponding author for this work

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

2 Citations (Scopus)


Miocene carbonate reservoirs may contain appreciable amount of microporosity in grain, cement or matrix. Depending on the crystallometry and morphometry of micrite particles, microporosity can vary both in amount and in nature. Different kinds of micrite microtextures may produce different types of microporosity. This study proposes a classification of micrite microtextures and microporosity. Four different types of micrite microtextures are classified in this study; these are rounded micrites, subrounded micrites, microrhombic and polyhedral micrites, and compact anhedral micrites. Four different types of micropores are classified based on their pore sizes. These are very fine, fine, medium, and coarse micropores. The classification of microporosity allows its occurrence in carbonate reservoirs to be explained depending on micrite microtextures. The classification of micropores in terms of their micrite microtextural occurrence lead us to define the micropores that are contributing to the permeability of the reservoirs and allow fluid flow in carbonates. The classes of micropores together with the corresponding micrite microtextures of their occurrences help to define the potential reservoir rocks in terms of micrite microtextures.

Original languageEnglish
Title of host publicationIPTC 2011
Subtitle of host publicationInternational Petroleum Technology Conference
PublisherSociety of Petroleum Engineers
Number of pages12
Publication statusPublished - 2011
Externally publishedYes
EventInternational Petroleum Technology Conference 2011, IPTC 2011 - Bangkok, Thailand
Duration: 15 Nov 201117 Nov 2017


ConferenceInternational Petroleum Technology Conference 2011, IPTC 2011

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