Detecting vuggy porosity in carbonate reservoirs by well logs

Asgarinezhad, Yousef; Asgarinezhad, Masoud; Tokhmechi, Behzad; Kamkar‐Rouhani, Abolghasem; Sherkati, Shahram

doi:10.1007/s13202-015-0169-7

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…Permeability is significantly affected by vuggy porosity. Additionally, pressure drop and recovery factor in the reservoir are influenced by it [27]. Touching vugs, observed when fracturing decrease, are important because they can increase production [28].…”

Section: Porositymentioning

confidence: 99%

Estimation of Petrophysical Parameters of Carbonates Based on Well Logs and Laboratory Measurements, a Review

Stadtmüller

Jarzyna

2023

Energies

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The purpose of this review paper is to show the possibilities of carbonate reservoir characterization using well logging and laboratory measurements. Attention was focused on standard and new methods of well logging acquisition and interpretation including laboratory experiments to show a part of the history of carbonate rock investigations as hydrocarbon or water reservoirs. Brief information on the geology, mineralogy and petrography of carbonate rocks was delivered. Reservoir properties, i.e., porosity (including fracturing), permeability, and saturation, were defined to emphasize the specific features of carbonates, such as fractures, and vugs. Examples of methodologies were selected from the commonly used laboratory techniques (thin sections examination, mercury and helium porosimetry, X-ray diffraction—XRD) combined with the standard well logs (bulk density—RHOB, neutron porosity—NPHI, sonic slowness—DT, and deep resistivity—Rd) to show the methods that have been used since the very beginning of the scientific and engineering studies of carbonates. Novelty in well logging, i.e., resistivity and acoustic imaging, nuclear magnetic resonance–NMR, dipole shear sonic imaging–DSI, and a spectral neutron-gamma log-geochemical device–GLT combined with modern laboratory investigations (NMR laboratory experiments, scanning electron microscopy SEM), showed how continuous information on mineral composition, porosity and saturation could be obtained and juxtaposed with very detailed laboratory data. Computed X-ray tomography (CT) enabling the 2D and 3D analyses of pores and fractures was presented as a quantitative methodology, effective in pore space characterization, revealing rock filtration abilities. Deep learning and artificial intelligence were used for joining various types of data. It was shown that thanks to new computational technologies original data from very small samples (micro scale), extensively describing the flow ability of the reservoir, could be extended to mezzo scale (core samples) and macro scale (well log images). Selected examples from the published papers illustrated the review. References cited in the text, together with the issues included in them, were the rich source of the practical knowledge processed These were checked by the authors and could be used in other projects.

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Section: Porositymentioning

confidence: 99%

Estimation of Petrophysical Parameters of Carbonates Based on Well Logs and Laboratory Measurements, a Review

Stadtmüller

Jarzyna

2023

Energies

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“…Porositas seperti ini berpengaruh signifikan terhadap permeabilitas, penurunan tekanan, dan recovery factor (RF) di reservoir. Uji RCAL (Routine Core Analysis atau analisis batuan inti rutin/dasar) adalah salah satu alat utama untuk menentukan vugs /lubang-lubang (Asgarinezhad et al, 2016). Lihat Gambar 2.…”

Section: Pendahuluanunclassified

Pengaruh Chalky pada Porositas dan Permeabilitas Reservoir Batugamping Berdasarkan Uji Laboratorium Sampel Core, dari Lapangan “AR”

Rahman

Rahmawati

2021

jist

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Porositas batuan reservoir menentukan jumlah volume cadangan migas, sedangkan permeabilitas sangat penting untuk radius pengurasan migas dan recovery factor (RF). Tujuan dari penelitian yaitu mengetahui efek kedalaman terhadap porositas batugamping (limestone), hubungan porositas dan permeabilitas, dan mengetahui efek/pengaruh adanya chalk pada sampel core plug batugamping terhadap nilai porositas dan permeabilitas. Metode penelitian yang digunakan adalah Uji Lab yang dilakukan di Laborarotium Routine Core Analysis (RCAL) di PPPTMBG “Lemigas” Jakarta. Bahan yang digunakan adalah 21 (duapuluh satu) sampel core plug yang diambil secara horizontal, yang sudah dideskripsi, dan siap uji, dari sampel conventional core dari reservoir batugamping yang mengandung minyak bumi (oil reservoir), dari lapangan “AR”. Tahapan penelitian yaitu mengukur nilai porositas (ø) dan permeabilitas (k) menggunakan alat porosimeter-permeameter dengan gas helium, kemudian plot grafik hasil pengukuran, untuk dilakukan analisis. Hasilnya, pengukuran porositas limestone tanpa chalky terendah yaitu 11,58% s.d tertinggi yaitu 23,79%, atau cukup (fair) hingga sangat baik (very good), sedangkan porositas limestone dengan chalky terendah yaitu 29,20% s.d tertinggi yaitu 42,12%, atau istimewa (excellent). Permeabilitas limestone tanpa chalky terendah yaitu 0,5 mD s.d tertinggi yaitu 10,90 mD, atau ketat (tight) hingga cukup (fair), sedangkan permeabilitas limestone dengan chalky terendah yaitu 38,4 mD s.d tertinggi yaitu 193,90 mD, atau baik (good) hingga sangat baik (very good). Kesimpulan penelitian ini yaitu porositas batuan karbonat dalam kasus ini tidak terpengaruh terhadap kedalaman, hubungan porositas dan permeabilitas dalam kasus ini adalah berbanding lurus secara eksponensial, dan nilai porositas dan permeabilitas limestone dengan kehadiran chalky lebih baik dibanding limestone tanpa kehadiran chalky.

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Characterization of source quality based on petrophysical logs and seismic data—a case study from Western Australia

Nezhad

Moradzadeh

2021

Arab J Geosci

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Detecting vuggy porosity in carbonate reservoirs by well logs

Cited by 4 publications

References 14 publications

Estimation of Petrophysical Parameters of Carbonates Based on Well Logs and Laboratory Measurements, a Review

Estimation of Petrophysical Parameters of Carbonates Based on Well Logs and Laboratory Measurements, a Review

Pengaruh Chalky pada Porositas dan Permeabilitas Reservoir Batugamping Berdasarkan Uji Laboratorium Sampel Core, dari Lapangan “AR”

Characterization of source quality based on petrophysical logs and seismic data—a case study from Western Australia

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