Detailed parametrization of the pore space in tight clastic rocks from Poland based on laboratory measurement results

Krakowska, P.

doi:10.1007/s11600-019-00331-0

Cited by 10 publications

(6 citation statements)

References 27 publications

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“…Depth matching of laboratory results and well logging outcomes was the basis for data upscaling. Sophisticated micro-tomography experiments showed complicated geometry of pore structure of shale rocks [7,10]. Extended density and porosity investigations helped in identification of gas presence in macro and micro pores [11].…”

Section: Discussionmentioning

confidence: 99%

Petrophysical Investigations of Shale Gas Formations in Poland

Ja¹

2020

AMMS

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Results of laboratory experiments and well logging processing and interpretation are described to show the investigation trial realized on the Polish Silurian and Ordovician shale gas deposits in the Baltic Basin, north Poland. Standard and sophisticated laboratory methods of density, porosity, permeability, mineral composition and geochemical parameters measurements on rock samples were performed. Statistical methods were applied to standard, dipole sonic and geochemical well logs to limit the processed data without loss of useful petrophysical information, avoiding redundancy and doing the primary classification. The goal of this specific trial was to build petrophysical model of shale gas rocks taking into account low porosity, very low permeability, TOC equal at least 2 wt.% and organic matter as a kerogen and bitumen, free gas gathered in the rock matrix effective porosity and in secondary porosity. The unique model for the Polish shale gas formations is explained by age, depth of occurrence and mineral composition of the Silurian and Ordovician shales, different from those described in the literature.

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Section: Discussionmentioning

confidence: 99%

Petrophysical Investigations of Shale Gas Formations in Poland

Ja¹

2020

AMMS

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“…A voxel is a 3D pixel. CT images were processed qualitatively and quantitatively using poROSE software (poROus materials examination SoftwarE) (Krakowska 2019). The analyses focused on the capabilities of CT in determining the geometrical parameters of the pore space.…”

Section: Fig 1 Scheme Of Pore Space Processing Into Pore Space Skelet...mentioning

confidence: 99%

New filtration parameters from X-ray computed tomography for tight rock images

Krakowska-Madejska

2022

geol

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New parameters are proposed to evaluate the filtration properties of rocks obtained on the basis of 3D interpretation of images from X-ray computed tomography. The analyzed parameters are: global average pore connectivity, average blind pore connectivity, blind pore coefficient per object and blind pore coefficient per branch. The 3D pore space from computed X-ray tomography must be subjected to a process of pore space transformation into a skeleton. Then, the presented parameters can be evaluated, taking into consideration the pore channels (branches), pore channel connection points (junctions) and blind pores (pore without connection to the other pore). The calculations were made for low porosity sandstones, mudstones, limestones, and dolomites which differ in terms of age and depth of present deposition. The global average pore connectivity reflects the degree of development of the pore space in which the formation fluid can flow. The higher the global average pore connectivity, the most complex the pore structure can be expected. The higher the parameter of the average blind pore connectivity, the worse are the filtration properties of the rock. The higher the concentration of blind pore coefficient per object or branch, the worse the filtration properties of the rock. Moreover, new parameters were compared with the Euler characteristic and coordination number, revealing a high consistency.

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“…Computed X-ray tomography allows extracting the geometrical model of the pore space in detail [27,28]. The physical basis of the measurements is connected with Beer's Law.…”

Section: Computed X-ray Tomography (Ct)mentioning

confidence: 99%

Research on Fluid Flow and Permeability in Low Porous Rock Sample Using Laboratory and Computational Techniques

Krakowska

Madejski

2019

Energies

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The paper presents results of fluid flow simulation in tight rock being potentially gas-bearing formation. Core samples are under careful investigation because of the high cost of production from the well. Numerical simulations allow determining absolute permeability based on computed X-ray tomography images of the rock sample. Computational fluid dynamics (CFD) give the opportunity to use the partial slip Maxwell model for permeability calculations. A detailed 3D geometrical model of the pore space was the input data. These 3D models of the pore space were extracted from the rock sample using highly specialized software poROSE (poROus materials examination SoftwarE, AGH University of Science and Technology, Kraków, Poland), which is the product of close cooperation of petroleum science and industry. The changes in mass flow depended on the pressure difference, and the tangential momentum accommodation coefficient was delivered and used in further quantitative analysis. The results of fluid flow simulations were combined with laboratory measurement results using a gas permeameter. It appeared that for the established parameters and proper fluid flow model (partial slip model, Tangential Momentum Accommodation Coefficient (TMAC), volumetric flow rate values), the obtained absolute permeability was similar to the permeability from the core test analysis.

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Detailed parametrization of the pore space in tight clastic rocks from Poland based on laboratory measurement results

Cited by 10 publications

References 27 publications

Petrophysical Investigations of Shale Gas Formations in Poland

Petrophysical Investigations of Shale Gas Formations in Poland

New filtration parameters from X-ray computed tomography for tight rock images

Research on Fluid Flow and Permeability in Low Porous Rock Sample Using Laboratory and Computational Techniques

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