Petrophysical properties of porous medium from Petrographic Image Analysis data

Cérepi, Adrian; Humbert, Louis; Burlot, R.

doi:10.1016/s0927-7757(01)00636-7

Cited by 17 publications

(6 citation statements)

References 6 publications

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“…Hence it seems that an accurate quantification of 3D pores requires data assimilation and statistic treatment of narrow-ranged serial 2D slices as many as possible, which is surely as important as the endeavors for exacting segmentation of the features over an improved high resolution image of a single 2D slice (e.g. refs 7 , 24 , 25 ). Here a significant insight can be drawn, i.e., the CT method treating a great number of successive image slices thus being three dimensional in practice is more appropriate for an accurate measurement of rock porosity.…”

Section: Resultsmentioning

confidence: 99%

“…The traditional Dean Stark and Retort methods of early 1900s have been exploited so far to extract and quantify the matter of hydrocarbon in the rock sample which is also indicative of the reservoir porosity 1 2 3 . For more rapid, direct porosity measurements, researchers have developed different means of measurement such as mercury intrusion 4 5 (MI), helium injection 3 (HI), petrographic image analysis 6 7 (PIA), and, more recently, computed-tomographic (CT) methods (e.g. refs 8 , 9 , 10 , 11 , 12 ).…”

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confidence: 99%

“…The method of the petrographic image analysis (PIA) can settle the trouble of exacting the bulk volume measurement as it achieves the goal of porosity measurement by a direct calculation of individual areal portions of matrix and pores that can be binarized on an image slice 7 . This method, however, contains a strong cause of inaccurate porosity derivation in respect that the calculation is made on a single 2D image slice corresponding to the surface of a thin or polished section.…”

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confidence: 99%

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Correlative multiple porosimetries for reservoir sandstones with adoption of a new reference-sample-guided computed-tomographic method

Jin

Kim

Lee

et al. 2016

Sci Rep

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One of the main interests in petroleum geology and reservoir engineering is to quantify the porosity of reservoir beds as accurately as possible. A variety of direct measurements, including methods of mercury intrusion, helium injection and petrographic image analysis, have been developed; however, their application frequently yields equivocal results because these methods are different in theoretical bases, means of measurement, and causes of measurement errors. Here, we present a set of porosities measured in Berea Sandstone samples by the multiple methods, in particular with adoption of a new method using computed tomography and reference samples. The multiple porosimetric data show a marked correlativeness among different methods, suggesting that these methods are compatible with each other. The new method of reference-sample-guided computed tomography is more effective than the previous methods when the accompanied merits such as experimental conveniences are taken into account.

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Correlative multiple porosimetries for reservoir sandstones with adoption of a new reference-sample-guided computed-tomographic method

Jin

Kim

Lee

et al. 2016

Sci Rep

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“…Over or underestimation of porosities is expected when a comparison is performed between 2D and 3D analyses of porous network of rocks. [37][38][39][40] The porosities calculated from autoradiographs result from the 2D sections of samples while TW investigates all three dimensions of the porous network. The autoradiographs taken from 2D sections of samples could be non-representative of the sample's total porosity.…”

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confidence: 99%

Comparison of phosphor screen autoradiography and micro-pattern gas detector based autoradiography for the porosity of altered rocks

Delayre

Sammaljärvi

Billon

et al. 2020

Sci Rep

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this study aims to further develop the 14 c-pMMA porosity calculation method with a novel autoradiography technique, the Micro-pattern gas detector autoradiography (MpGDA). in this study, the MpGDA is compared with phosphor screen autoradiography (SpA). A set of rock samples from Martinique island exhibiting a large range of connected porosities was used to validate the MpGDA method. calculated porosities were found to be in agreement with ones from the SpA and the tripleweight method (TW). The filmless nature of MPGDA as well as straightforward determination of C-14 radioactivity from the source rock makes the porosity calculation less uncertain. The real-time visualization of radioactivity from C-14 beta emissions by MPGDA is a noticeable improvement in comparison to SpA. Autoradiography has demonstrated its adaptability and reliability in several research areas. With regard to the development of autoradiographic techniques the very first autoradiograph was obtained by Becquerel in 1896, through exposition of an emulsion of silver halide crystals in contact with radioactive material 1. Autoradiographic techniques allow the production of spatial distribution of radioactivity in the material; the sample itself being the source of the radioactivity either as occurring naturally in the material or as artificially added radioactivity. In the case of geological samples, 238 U, 232 Th and 40 K bearing minerals are the main sources of natural radioactivity 1. The radioactive source may also be in the form of an artificial radioactive marker, such as 3 H or 14 C labelled methylmethacrylate (MMA) 2-4. Investigated samples are impregnated with the radiolabeled tracer and fixed in place via polymerization of the marked MMA in the connected pore network of rock samples. Thus, the image of the connected pore network can be produced by exposing the impregnated sample surface on a photographic film. This brief description corresponds to the 14 C polymethylmethacrylate (14 C-PMMA) autoradiography method 2-4 and will be used for porosity analysis in this work. In the field of nuclear waste management, the 14 C-PMMA method has been successfully applied to investigate the connected pore network of geological materials, radioelements diffusion within rock matrices and relations between the porosity and mineralogy of rocks 5-8. In the biological field, injecting the radioligands into living tissues allows to map the anatomical location of specific receptors by autoradiographic techniques. For instance, Larsson & Ullberg 9 introduced a new autoradiographic technique, the whole body macro autoradiography (WBA), allowing to study the distribution of 35 S-labelled penicillin in a rat using entire frozen sections of them after injection of radiolabeled tracer. In drug distribution studies, Young and Kuhar 10 were able to localize opioid receptors in a rat brain by 14 C, 3 H, 125 I and 35 S, and more recently, Fang et al. 11 studied the effect of cocaine, ketamine and methamphetamine on dopamine terminals in the striatum of rats using 18 ...

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“…This study underscored various important aspects of using neutral networks as nonlinear estimators in a multivariate analysis. Cerepi et al (2001) described a method of characterization and quantification of petrophysical properties of carbonate pore systems from petrographic image analysis on length scales spanning more than three orders of magnitude, from submicron to millimeter scale. They compared these results with petrophysical property values obtained by classical petrophysical methods (3-D).…”

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Correlation Between Microstructure and Flow Behavior in Porous Sandstones

Baraka-Lokmane

Main

Ngwenya

et al. 2009

Petroleum Science and Technology

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Abstract:The correlation between permeability and petrographical parameters in cored samples can be used by extrapolations to predict permeability in uncored intervals. The core analysis described here is concerned with the study of fluidrock interactions in rock samples from three sandstone reservoirs, in particular the effect of petrographical parameters on flow behavior. A positive correlation between liquid permeability and the volume fraction of silica is clearly demonstrated. Liquid permeability was correlated using multivariate regressions to one to five petrographical parameters, the results of which have useful application in the estimation of reservoir permeability where samples are not available for experimental testing.

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Petrophysical properties of porous medium from Petrographic Image Analysis data

Cited by 17 publications

References 6 publications

Correlative multiple porosimetries for reservoir sandstones with adoption of a new reference-sample-guided computed-tomographic method

Correlative multiple porosimetries for reservoir sandstones with adoption of a new reference-sample-guided computed-tomographic method

Comparison of phosphor screen autoradiography and micro-pattern gas detector based autoradiography for the porosity of altered rocks

Correlation Between Microstructure and Flow Behavior in Porous Sandstones

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