Integrated geophysical data for sweet spot identification in Baltic Basin, Poland

Cichostępski, Kamil; Kwietniak, Anna; Dec, Jerzy; Kasperska, Monika; Pietsch, Kaja

doi:10.14241/asgp.2019.01

Cited by 6 publications

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“…Based on the relationship between the type of rock and its seismic velocity [100][101][102][103], as well as the results of geological mapping of the surface in the studied area, is possible to interpret the first 250 m of the profile as a complex consisting of a sandstone-dominated flysch, where areas of low velocity show mudstone strata. This part responds to the deposits of the Central Carpathian Paleogene and the Złatne Unit (I-III) formed from sandstonedominated flysch deposits.…”

Section: Pkb Mélange In the Seismic Image-preliminary Results Of Srt ...mentioning

confidence: 99%

Mélange, Flysch and Cliffs in the Pieniny Klippen Belt (Poland): An Overview

et al. 2022

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The Pieniny Klippen Belt (PKB) is located in the suture zone between the Central and Outer (Flysch) Carpathians. Its structure is an effect of prolonged processes of the Cretaceous–Miocene folding, thrusting and uplifting. In this zone, tectonic components of different ages and features, including strike-slip-bounded tectonic blocks, thrust units, as well as toe-thrusts and olistostromes, result in the present-day mélange characteristics of the PKB, where individual tectonic units are difficult to distinguish. In the PKB, both tectonic and sedimentary events triggered the mélange creation. The name “Klippen Belt” is derived from cliffs (German Klippen). These cliffs form harder, more erosion-resistant elements of the mélange, residing within less competent clastic deposits, sandstones, shales and marls that form flysch complexes. The cliffs often represent olistoliths, which glided down from elevated areas to the deeper basinal zones. Two olistostrome belts were distinguished. The older one resulted from subduction of the southern part of the Alpine Tethys, and the younger originated in response to the northward shift of the accretionary wedge. The other cliffs were placed within the surrounding clastic by tectonic deformational processes. The flower structure of the PKB was formed during the collision and strike-slip movement of the lithospheric plates. This structure is limited on both sides by deep-rooted faults. Several evolutionary stages could be distinguished in these areas. The rift-related stage is expressed by the opening of the Alpine Tethys that contains two major basins—Magura and Pieniny (Złatne) basins, separated by Czorsztyn Ridge. The reorganization of the Alpine Tethys basins and the development of the accretionary prism happened during the synorogenic stage. This process was initiated by the movement of the Central Carpathians. Thick flysch sequences with olistostromes were deposited in these basins. The Czorsztyn Ridge was destroyed during the late orogenic stages.

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Section: Pkb Mélange In the Seismic Image-preliminary Results Of Srt ...mentioning

confidence: 99%

Mélange, Flysch and Cliffs in the Pieniny Klippen Belt (Poland): An Overview

et al. 2022

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“…For this profile, after calculating the deposit reflection coefficient according to Equation (6) using estimator (7), we were able to calculate an approximate value of the average porosity of the deposit (Figure 11c We wanted to compare our method of calculating porosity with the standard procedure that is used for seismic reservoir characterisation-seismic inversion. This method utilizes seismic and borehole data to transform the seismic data from the amplitude domain to the impedance domain, which gives insight into the quantitative petrophysical parameters of the subsurface [52,53]. Seismic inversion was calculated using Hampson-Russell software (version 10).…”

Section: Estimation Of Sulphur Reservesmentioning

confidence: 99%

Estimation of Shallow Sulphur Deposit Resources Based on Reflection Seismic Studies and Well Logging

Cichostępski

Dec

2021

Energies

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In this article we present a novel method for the estimation of sulphur deposit resources based on high-resolution shallow reflection seismic survey and well logging. The study area was sited in the northern part of the Carpathian Foredeep (SE Poland), where sulphur ore occurs in carbonate rocks at a depth of about 120 m, with a thickness of approximately 25 m. The results of many years of seismic monitoring performed in the area of the sulphur deposit allowed us to determine the quantitative relationships between the amplitude of the seismic signal reflected from the top of the deposit and its petrophysical parameters such as porosity and sulphur content. The method of evaluating sulphur deposit is based on extensive statistics concerning the reservoir properties obtained from borehole data. We also discuss a methodology for conducting field acquisition and processing of seismic data in the aspect of mapping the actual amplitudes of the signal reflected from the top of a deposit. The results of estimating the abundance of carbonate sulphur deposits are presented based on the example of a seismic cross-section from the Osiek sulphur mine. Obtained results allow indicating the most prospective zones suitable for exploitation.

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“…The Bal tic Ba sin is char ac ter ized by a low de gree of tec tonic de for ma tion and a near-ab sence of tectonic dips or folds of the sed i men tary strata (Poprawa, 2010a). The pat tern of faults within the ba sin is sparse (Poprawa, 2019), and faults are com monly of small off set, typ i cally in the range from tens of metres to >100 m (Domżalski et al, 2004;Poprawa et al, 2006;Krzywiec, 2011Krzywiec, , 2012Cichostępski et al, 2019). Such a tec tonic set ting, which might be re garded as fa vour able for shale gas/oil ex plo ra tion and pro duc tion (Fig.…”

Section: Tectonic Deformation and Reservoir Pressure Regimementioning

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Lower Paleozoic oil and gas shale in the Baltic-Podlasie-Lublin Basin (central and eastern Europe) – a review

Poprawa¹

2020

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In the Bal tic-Podlasie-Lublin Ba sin, four po ten tial lower Pa leo zoic shale res er voirs are iden ti fied: the Piaśnica, Sasino and Jantar for ma tions, as well as the Mingajny shale. These units were diachronously de pos ited dur ing the starved stages of Cal edo nian foredeep ba sin de vel op ment, in the course of ris ing or high eustatic sea level. Across most of the ba sin, the shale for ma tions ana lysed are sat u rated with light oil and con den sate, and they are bur ied to depths of 2300-3500 m. The shale res er voirs reach the wet gas win dow at burial depths of 2800-4000 m, while dry gas ac cu mu la tions oc cur at depths ex ceed ing 3500-5000 m, ex cept in the Biłgoraj-Narol Zone. The shale ana lysed might be gen er ally clas si fied as a mod erate to low qual ity, and lo cally high qual ity, un con ven tional res er voir. Within the shale net pay zones, the av er age TOC content is 2-5 wt.% TOC. The ex cep tions are the Piaśnica For ma tion, for which this is 5-12 wt.%, and the Mingajny shale, which is TOC-lean (1.4-1.7 wt.%). The thick ness of the shale net pay in ter vals in the most fa vour able lo ca tions, mainly on the Łeba Elevation, gen er ally reaches 20 m, and lo cally ex ceeds 35 m. The shale res er voirs are sat u rated with hy dro carbons of good qual ity. Their per me abil ity is low to mod er ate, of ten in the range of 150-200 mD, while to tal po ros ity av er age per bore hole is com monly ex ceeds 6 %, reach ing up to 10% at max i mum, which might be con sid ered as mod er ate to good. The clay min er als con tent is mod er ate to high (30-50%), and geomechanical char ac ter is tics of the shale for ma tions are inter me di ate be tween brit tle and duc tile. No overpressure oc curs in the ba sin, ex cept for a dry gas zone in the SW Bal tic Basin. In the Biłgoraj-Narol Zone, and to a lesser de gree also in the Lublin re gion, pro nounced tec tonic de for ma tion sig nif i cantly lim its shale gas/oil po ten tial. Among 66 ex plo ra tion bore holes drilled in the ba sin so far, only 5 were lat eral bore holes with rep re sen ta tive pro duc tion test re sults. Hy dro car bon flow from the best bore holes was low to mod er ate, equal to 11.2 to 15.6 thou sand m 3 /day for gas, and 157 bbl/day (~21.4 ton/day) for oil. There is, how ever, high po ten tial to im prove pro duc tion flow rates, con nected with the frac tur ing of two net pay in ter vals at one time, as well as with sig nif i cant tech no log i cal prog ress in the ex ploi ta tion of shale bas ins dur ing the last 5 years. Com mer cially vi a ble pro duc tion might be achieved for a sin gle bore hole with es ti mated ul ti mate re cov ery ex ceed ing 30-50 thou sand tons of oil, or 60-90 mil lion m 3 of gas.

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Integrated geophysical data for sweet spot identification in Baltic Basin, Poland

Cited by 6 publications

References 0 publications

Mélange, Flysch and Cliffs in the Pieniny Klippen Belt (Poland): An Overview

Mélange, Flysch and Cliffs in the Pieniny Klippen Belt (Poland): An Overview

Estimation of Shallow Sulphur Deposit Resources Based on Reflection Seismic Studies and Well Logging

Lower Paleozoic oil and gas shale in the Baltic-Podlasie-Lublin Basin (central and eastern Europe) – a review

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