Mineralogy and Permeability of Gas and Oil Dolomite Reservoirs of the Zechstein Main Dolomite Basin in the Lubiatów Deposit (Poland)

Krogulec, Ewa; Sawicka, Katarzyna; Zabłocki, Sebastian; Falkowska, Ewa

doi:10.3390/en13236436

Cited by 5 publications

(6 citation statements)

References 57 publications

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“…A consistent paragenetic scheme has been determined for the Hauptdolomit (Fig. 14) based on petrographic analysis of core and cuttings from 11 wells on the MNSH, and on the interpretation of diagenetic processes affecting analogue platform carbonates from fields in Poland such as the BMB and LMG fields (Krogulec et al, 2020;Kosakowski and Krajewski, 2014;Kwolek and Mikolajewski, 2010). The most important diagenetic processes affecting reservoir quality were dolomitization, partial to complete dissolution of the abundant aragonitic grains (green algae, molluscs, some microbialites), anhydrite cementation, dedolomitization, and localised late-stage dissolution of dolomite and anhydrite.…”

Section: Hauptdolomit Reservoir Diagenesismentioning

confidence: 77%

“…For the Hauptdolomit in the Kościan field, typical porosities are 13-15% and permeabilities 5-25 mD. In the Lubiatow field, porosities of 5-31% and permeabilities of 1-136 mD are reported (Krogulec et al, 2020). In the Grotów field, average porosity of 10% and permeability of only 0.25 mD is reported from an unusual oomouldic reservoir interpreted to have been deposited in a toeof-slope apron setting (Jasionowski and Zsanowski, in Peryt et al, 2010).…”

Section: Southern Permian Basinmentioning

confidence: 98%

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The Zechstein Z2 Hauptdolomit Platform in the Southern Uk Mid North Sea High and Its Associated Petroleum Plays, Potential and Prospectivity

Browning‐Stamp,

Caldarelli,

Heard

et al. 2023

Journal of Petroleum Geology

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The Mid North Sea High (MNSH) region represents one of the least explored areas for the Late Permian Zechstein Hauptdolomit play in the Southern Permian Basin although some of the first offshore wells drilled in the UK were located here. In other parts of the basin such as onshore Poland, the Hauptdolomit Formation (“Hauptdolomit”) is an active and attractive exploration target, with oil and gas production from commercial‐sized fields. In the UK, the play has been overshadowed by drilling campaigns in areas to the south of the MNSH which tested plays in the underlying Rotliegend and Carboniferous successions. However, with these areas now in decline, there is increased exploration interest in the Hauptdolomit in the MNSH region, particularly since 2019 when 3D seismic data were acquired and the first hydrocarbon discovery was made at Ossian (well 42/04‐01/1Z). Geochemical data from the latter discovery have pointed to the presence of a prolific petroleum system with the potential for Hauptdolomit reservoirs to be charged both by Zechstein‐generated oils and Carboniferous condensate/gas. With regard to hydrocarbon migration and preservation in the southern MNSH, a detailed evaluation of the effects of the Mid Miocene Unconformity has allowed for a greater understanding of the main factors controlling hydrocarbon preservation and remigration. Reservoir characterization of the Hauptdolomit play has been achieved by integrating petrographic microfacies analyses, core data and petrophysical interpretations. The most important factors controlling reservoir quality are the presence and extent of anhydrite cementation and the presence of high energy shoal facies. Thicker and coarser grained shoal facies are expected to occur along the yet‐to‐be explored Orchard platform margin where numerous prospects have been mapped and refined using recently acquired 3D seismic data.

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Section: Hauptdolomit Reservoir Diagenesismentioning

confidence: 77%

Section: Southern Permian Basinmentioning

confidence: 98%

The Zechstein Z2 Hauptdolomit Platform in the Southern Uk Mid North Sea High and Its Associated Petroleum Plays, Potential and Prospectivity

Browning‐Stamp,

Caldarelli,

Heard

et al. 2023

Journal of Petroleum Geology

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“…The Cybinka-Torzym tender area of 668.50 km 2 (165.189 ac) and Zielona Góra West tender area of 954.57 km 2 (235.879 ac) are located in western Poland in the Western Petroleum Province (Figures 2 and 4). The main exploration target is related here to conventional accumulations of gas and oil in the Permian Zechstein Main Dolomite and, less important, in the Upper Rotliegend horizons (Figures 2, 4 and 8) [96,[102][103][104][105][106][107][108][109][110][111][112]. Numerous hydrocarbon fields have been discovered and documented in the southern and eastern part of the Cybinka-Torzym area in the Main Dolomite horizon (Brzózka, Czeklin, Gry żyna, Kije, Kije NE, Kosarzyn N, Koszarzyn S, Kosarzyn E, Ołobok; Figure 6c).…”

Section: Cybinka-torzym and Zielona Góra West Tender Areasmentioning

confidence: 99%

New Opportunities for Oil and Gas Exploration in Poland—A Review

et al. 2022

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Reserves totaling ~142 BCM (5 TCF) of natural gas trapped in 306 fields and ~22 MTOE (~157 MMBOE) of crude oil in 87 fields have been discovered. The prospection, exploration, and production of hydrocarbons are licensed: an entity interested in these kinds of activities needs to have concession, which is granted by the Polish Ministry of Climate and Environment for 10 to 30 years according to one of two independent ways — international tender or open door procedure. In this review, the most prospective areas for oil and gas exploration in Poland, selected by the Polish Geological Survey, and announced as dedicated for the next 6th tender round, planned in the second half of 2022, are described. These are: Block 413–414, Block 208, Cybinka–Torzym, Zielona Góra West, and Koło areas. The main exploration target of these tender areas is related to conventional and unconventional accumulations of gas and oil in the Carpathian basement, Carpathian Foredeep, and Outer Carpathians (Block 413–414), as well as in the Carboniferous, Permian Rotliegend, Zechstein Main Dolomite (Block 208, Cybinka–Torzym, Zielona Góra West), and in the Mesozoic of the Polish Lowlands (Koło). The second way of granting concession in Poland is the so-called open door procedure, in which an entity may apply for a concession for any other area selected on its own.

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“…It was known from the available geological data that the Main Dolomite in the studied area might be saturated with gas, crude oil, and formation water. At least two electrofacies with significant water saturation S w in the bottom part and hydrocarbon saturation S h in the top part of the Main Dolomite were determined [29,30]. Unfortunately, a reliable Rt is needed to determine the saturation correctly.…”

Section: Electrofacies Calculationmentioning

confidence: 99%

Electrofacies as a Tool for the Prediction of True Resistivity Using Advanced Statistical Methods—Case Study

Baudzis¹,

Karłowska-Pik

Puskarczyk

2021

Energies

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Statistical analysis methods have been widely used in all industries. In well logs analyses, they have been used from the very beginning to predict petrophysical parameters such as permeability and porosity or to generate synthetic curves such as density or sonic logs. Initially, logs were generated as simple functions of other measurements. Then, as a result of the popularisation of algorithms such as the k-nearest neighbours (k-NN) or artificial neural networks (ANN), logs were created based on other logs. In this study, various industry and general scientific programmes were used for statistical data analysis, treating the well logs data as individual data sets, obtaining very convergent results. The methods developed for processing well logs data, such as Multi-Resolution Graph-Based Clustering (MRGBC), as well as algorithms commonly used in statistical analysis such as Kohonen self-organising maps (SOM), k-NN, and ANN were applied. The use of the aforementioned statis-tical methods allows for the electrofacies determination and prediction of an Rt log based on the other recorded well logs. Correct determination of Rt in resistivity measurements made with the Dual Laterolog tool in the conditions of the Groningen effect is often problematic. The applied calculation methods allow for the correct estimation of Rt in the tested well.

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Mineralogy and Permeability of Gas and Oil Dolomite Reservoirs of the Zechstein Main Dolomite Basin in the Lubiatów Deposit (Poland)

Cited by 5 publications

References 57 publications

The Zechstein Z2 Hauptdolomit Platform in the Southern Uk Mid North Sea High and Its Associated Petroleum Plays, Potential and Prospectivity

The Zechstein Z2 Hauptdolomit Platform in the Southern Uk Mid North Sea High and Its Associated Petroleum Plays, Potential and Prospectivity

New Opportunities for Oil and Gas Exploration in Poland—A Review

Electrofacies as a Tool for the Prediction of True Resistivity Using Advanced Statistical Methods—Case Study

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