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All Journal IJOG : Indonesian Journal on Geoscience Techno LPPM Journal of Geoscience, Engineering, Environment, and Technology Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Mineral, Energi dan Lingkungan Jurnal Mineral, Energi dan Lingkungan Indonesian Journal on Geoscience Indonesian Journal on Geoscience
Choiriah, Siti Umiyatun
Department Of Geology, Faculty Of Mineral Technology, Universitas Pembangunan Nasional Veteran, Yogyakarta, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Physics

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Journal : Jurnal Penelitian Pendidikan IPA (JPPIPA)

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Porosity Analysis of Pliocene Limestone from the Mundu Formation Based on Core and Petrographic Analysis Yusuf, Muh Ferdian; Choiriah, Siti Umiyatun; Humairoh, Wahyuni Annisa; Gutteres, Samuel Antonio; Idea, Kharisma; Amri, Danang Faisal
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.12315

Abstract

This study analyzes the porosity characteristics of Pliocene limestone from the Mundu Formation in the Gunung Pegat area, Lamongan, East Java, which lies within the Rembang Zone and is considered a potential carbonate reservoir. The research involved geological field mapping, measurement of four stratigraphic profiles, and collection of thirteen rock samples. Laboratory methods included petrographic analysis to classify lithofacies, core analysis to determine porosity, calcimetry for carbonate content, and microfossil analysis for age and depositional environment. Petrographic results show dominant packstone and wackestone lithologies, with pore types consisting of interparticle, moldic, and vuggy pores formed through bioclast dissolution and diagenesis. Core analysis reveals porosity values ranging from 1.5% to 22.1%, averaging 13.6%. High-porosity zones (>20%) occur in the western and northwestern parts, associated with bioclast-rich facies and meteoric water dissolution, whereas low values (<10%) are concentrated in the southeastern part due to compaction and recrystallization. These findings indicate that lithofacies variation and diagenetic processes significantly control reservoir quality. Overall, the Mundu Formation demonstrates good potential as a carbonate reservoir, particularly within packstone facies with well-developed secondary porosity, providing a useful basis for hydrocarbon and groundwater exploration in the northern East Java Basin.
Co-Authors Achmad Subandrio Amri, Danang Faisal Desi Kumala Isnani Dwi Fitri Yudiantoro Edgie Yuda Kaesti Gunawan, Selviana Gutteres, Samuel Antonio Hendry Wirandoko Humairoh, Wahyuni Annisa Idea, Kharisma Intan Paramita Haty Intan Paramitha Haty Kapid, Rubiyanto Kristanto, Wisnu Aji Dwi Muhammad Ardiyan Syah Darmawa Muhammad Syaifudin Muhammad Syaifudin Nanda Ajeng Nurwantari Prasetyadi, Carolus Rizkiyanto, S.T., M.T., Yody Rubiyanto Kapid Rubiyanto Kapid Rubiyanto Kapid Yody Rizkianto Yusuf, Muh Ferdian