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Deformation bands - migration pathways or barriers for hydrocarbons in sedimentary rocks - mini review

Solecki Marek Leszek

Journal of Geotechnology and Energy

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2023

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Vol. 40, no. 4

15--21

EN

A mini review of the topic of deformation bands is presented in the paper. The concept of deformation bands is defined and their impact on the flow of fluids in porous sedimentary rocks is determined. Deformation bands are mm-thick low-displacement deformation zones which have intensified cohesion and lower permeability compared with ordinary fractures. This term was introduced in 1968 in material science, ten years later it appeared in the geological context. This microstructures can occur as barriers or migration pathways for hydrocarbons. Their role depends mainly on microstructural features, and they are also considered in reservoir modeling. The occurrence of deformation bands in Poland is also outlined and discussed - they have been described in Western Outer Carpathians (Magura and Silesia nappes).

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An evaluation of organic matter dispersed in the Menilite Formation in Silesian Nappe (Polish Outer Carpathians): an optical microscopic approach

Waliczek Marta, Machowski Grzegorz, Solecki Marek Leszek, Stefaniuk Michał

Geology, Geophysics and Environment

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2022

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Vol. 48, no. 3

243--256

EN

In this study, optical microscopic analyses were applied to evaluate the thermal maturity, characteristics of solid bitumen, and other organic matter finely dispersed in Oligocene shales of the Menilite Formation in the Iwonicz-Zdrój–Rudawka Rymanowska Fold (IRF) and Bóbrka–Rogi Fold (BRF) of the Central Carpathian Synclinorium of the Silesian Nappe, Outer Carpathians, Poland. The investigation was carried out at two-unit depths of the shallow and deeper D-1 sections (430 m – IRF and 4,300 m – BRF) and outcrop samples (BRF). The mean random huminite reflectance values indicate immature conditions with respect to hydrocarbon generation in samples from the D-1 shallow section (VRo ≈ 0.40%) and in the outcrop samples (VRo = 0.36%). The degree of thermal maturity of the organic matter from a depth of about 4,300 m – BRF based on random vitrinite (VRo ≈ 0.80%) and solid bitumen (BRo ≈ 0.65%) reflectance measurements is associated with the “oil window” for petroleum generation. The organic components dispersed in the examined Menilite Formation samples are typical for hydrocarbon-prone organic matter, suggesting the dominant kerogen type II. The potential precursor maceral for solid bitumen occurring in the examined samples from the deeper D-1 sections is largely the alginite maceral.

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Wpływ mikrotekstury i procesu kwasowania skały na jej parametry zbiornikowe : studium przypadku piaskowców krośnieńskich z rejonu Dwernika, Bieszczady

Strzelecki Piotr Jan, Solecki Marek Leszek

Przegląd Geologiczny

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2021

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Vol. 69, nr 7

454--457

EN

The paper briefly describes 3D variability of reservoir properties, such as porosity and permeability at a micro-scale in reference to the directionality of rock microtexture andthe occurrence of a deformation band. The study was conducted on the sample of the coarse-grained Krosno Sandstones with a deformation band after treatment with hydrochloric acid.Spot measurements of permeability using a portable air minipermeameter and porosity using X-ray computed microtomography were made. The local porosity within the sample ranges from 1.38 to 2.70 %, whereas the permeability varies from 7.5 to 14.5 mD. The anisotropy of permeability within the sample is related to the orientation of pores. The highest permeability values are observed in the direction parallel to the largest elongation of pores. The deformation band shows higher permeability values in comparison to the undeformed part of the sample.

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Water resources and climate change - groundwater as an alternative source of water supply

Winid Bogumiła, Chruszcz‑Lipska Katarzyna, Maruta Michał, Solecki Marek Leszek

AGH Drilling, Oil, Gas

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2020

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Vol. 37, no. 2

5--14

EN

In recent years, the world, including Europe, has seen a much higher incidence of extreme weather phenomena. The ongoing climatic changes have a direct impact on the condition of surface waters. Groundwater is less affected by anthropogenic pollution than surface water, since groundwater can be used in distribution systems for municipal purposes, for food purposes, sold in unit packages, and for medicinal purposes (in drinking and bathing treatments). In Poland, a country with poor water resources, the problem of water scarcity due to climate change may even increase. One solution to this problem may be the increased use of Polish groundwater resources. Hydrogeological conditions favorable to the construction of drill wells, detailed identification of available groundwater resources throughout the country and the low degree of their usage (25% on average) make it possible to increase the intake of groundwater to cover this water deficit, especially in periods of drought.

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Wpływ prac rekultywacyjnych na zmiany jakościowe wód podziemnych w rejonie składowiska odpadów przemysłowych

Macuda Jan, Łukańko Łukasz, Maruta Michał, Chruszcz-Lipska Katarzyna, Winid Bogumiła, Solecki Marek Leszek

Przemysł Chemiczny

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2019

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T. 98, nr 5

797--800

PL

Przedstawiono ocenę zmian jakości wód podziemnych odpływających z rejonu składowiska odpadów przemysłowych "za rzeką Białą" w latach 2002-2017. Wykonano ją na podstawie analizy zmian wybranych wskaźników chemicznych w wodach podziemnych, takich jak pH, ChZT (chemiczne zapotrzebowanie tlenu), zawartość anionów chlorkowych, siarczanowych oraz amoniaku (jako N-NH₄⁺). Z dokonanej oceny wynika, że od 2004 r. nastąpiło znaczne zmniejszenie koncentracji głównych wskaźników zanieczyszczeń wód podziemnych. Spadek ich koncentracji był spowodowany głównie przez zakończenie prac rekultywacyjnych w obrębie trzech dużych sektorów składowiska odpadów przemysłowych oraz uszczelnienie geomembraną większości pozostałych sektorów i tym samym zmniejszenie ładunku zanieczyszczeń infiltrujących do wód podziemnych.

EN

Quantitative changes in groundwater near an industrial waste landfill (pH, chem. O₂ demand, chlorides, sulfates, NH₃) were assessed in 2002-2017. The concns. of major pollutants decreased during reclamation in 3 large sectors and after using of geomembranes in other ones.