Comprehensive Interpretation of the Laboratory Experiments Results to Construct Model of the Polish Shale Gas Rocks

More than 70 rock samples from so-called sweet spots, i.e. the Ordovician Sa Formation and Silurian Ja Member of Pa Formation from the Baltic Basin (North Poland) were examined in the laboratory to determine bulk and grain density, total and effective/dynamic porosity, absolute permeability, pore diameters size, total surface area, and natural radioactivity. Results of the pyrolysis, i.e., TOC (Total Organic Carbon) together with S1 and S2 – parameters used to determine the hydrocarbon generation potential of rocks, were also considered. Elemental composition from chemical analyses and mineral composition from XRD measurements were also included. SCAL analysis, NMR experiments, Pressure Decay Permeability measurements together with water immersion porosimetry and adsorption/ desorption of nitrogen vapors method were carried out along with the comprehensive interpretation of the outcomes. Simple and multiple linear statistical regressions were used to recognize mutual relationships between parameters. Observed correlations and in some cases big dispersion of data and discrepancies in the property values obtained from different methods were the basis for building shale gas rock model for well logging interpretation. The model was verified by the result of the Monte Carlo modelling of spectral neutron-gamma log response in comparison with GEM log results.

Download Full-text

Multiscale 3D Modeling for Evaluation of Shale Gas Resources in Western Part of the Baltic Basin - Preliminary Results

77th EAGE Conference and Exhibition 2015 ◽

10.3997/2214-4609.201413271 ◽

2015 ◽

Author(s):

B. Papiernik ◽

G. Machowski ◽

P. Poprawa ◽

M. Michna ◽

G. Zabek ◽

...

Keyword(s):

Shale Gas ◽

3D Modeling ◽

Baltic Basin ◽

Preliminary Results ◽

The Baltic

Download Full-text

Scenarios for shale gas development and their related land use impacts in the Baltic Basin, Northern Poland

Energy Policy ◽

10.1016/j.enpol.2015.04.032 ◽

2015 ◽

Vol 84 ◽

pp. 80-95 ◽

Cited By ~ 19

Author(s):

Claudia Baranzelli ◽

Ine Vandecasteele ◽

Ricardo Ribeiro Barranco ◽

Ines Mari i Rivero ◽

Nathan Pelletier ◽

...

Keyword(s):

Land Use ◽

Shale Gas ◽

Land Use Impacts ◽

Baltic Basin ◽

Northern Poland ◽

The Baltic

Download Full-text

Geomechanical modellingl of Paleozoic Shale Gas Formation: a case study from the Baltic Basin, northern Poland

Geology Geophysics & Environment ◽

10.7494/geol.2017.43.3.249 ◽

2017 ◽

Vol 43 (3) ◽

pp. 249

Author(s):

Małgorzata Słota-Valim ◽

Krzysztof Sowiżdzał ◽

Halina Jędrzejowska-Tyczkowska

Keyword(s):

Shale Gas ◽

Baltic Basin ◽

Gas Formation ◽

Northern Poland ◽

The Baltic

Download Full-text

How Did the Baltic Basin Source Rocks Become the Shale Gas Exploration Targets in Poland?

10.3997/2214-4609.201901335 ◽

2019 ◽

Author(s):

M. Janas ◽

T. Podhalanska ◽

A. Gluszynski ◽

J. Roszkowska-Remin ◽

R. Pachytel

Keyword(s):

Shale Gas ◽

Source Rocks ◽

Baltic Basin ◽

The Baltic

Download Full-text

The effect of organic matter maturation and porosity evolution on methane storage potential in the Baltic Basin (Poland) shale-gas reservoir

International Journal of Coal Geology ◽

10.1016/j.coal.2017.07.005 ◽

2017 ◽

Vol 180 ◽

pp. 46-56 ◽

Cited By ~ 26

Author(s):

Tomasz Topór ◽

Arkadiusz Derkowski ◽

Paweł Ziemiański ◽

Jakub Szczurowski ◽

Douglas K. McCarty

Keyword(s):

Organic Matter ◽

Shale Gas ◽

Methane Storage ◽

Baltic Basin ◽

Gas Reservoir ◽

Porosity Evolution ◽

Shale Gas Reservoir ◽

Storage Potential ◽

The Baltic

Download Full-text

Diverse Scale Data for Shale Gas Formation Description—Why Is Digital Shale Rock Model Construction Difficult? The Polish Silurian and Ordovician Rocks Case Study

Minerals ◽

10.3390/min10020108 ◽

2020 ◽

Vol 10 (2) ◽

pp. 108

Author(s):

Paulina I. Krakowska-Madejska ◽

Jadwiga A. Jarzyna

Keyword(s):

Shale Gas ◽

Gamma Ray ◽

Laboratory Methods ◽

Petrophysical Parameters ◽

Shale Rock ◽

Gas Formation ◽

Special Software ◽

Shale Formation ◽

Rock Model ◽

Adsorption Desorption

The aim of the study was to show that the petrophysical parameters, characterizing the shale gas formation, obtained from the various scale well logging and laboratory methods, correlated among themselves. Relationships determined on the basis of mesoscale (logs) and microscale outcomes (laboratory experiments on plugs or crumbs) were also recognizable in nanoscale in the computed tomography results. Selected logs (spectral gamma ray, resistivity, density, neutron, geochemical and acoustic logs) and laboratory methods turned out to be effective in rock typing and description of petrophysical parameters. Nanoscale results processing and interpretation was supported by the sophisticated special software poROSE (version 3.18, AGH University of Science and Technology, Kraków, Poland) to determine special parameters, which correlated with the standard laboratory outcomes. Results of the mercury injection porosimetry, together with adsorption/desorption of nitrogen at 77 K and pressure decay permeability, were used as the basal parameters for building a digital model of shale rock and a detailed description of the Silurian and Ordovician shale formation, treated as the hydrocarbon prospective unconventional reservoirs. Including the computed X-ray tomography results in the correlation analyses, gave the platform to extend the standard 2D approach in building the rock model to novel, 3D and more detailed presentations of rock characteristics.

Download Full-text

Coupling between Source Rock and Reservoir of Shale Gas in Wufeng-Longmaxi Formation in Sichuan Basin, South China

Energies ◽

10.3390/en14092679 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2679

Author(s):

Yuying Zhang ◽

Shu Jiang ◽

Zhiliang He ◽

Yuchao Li ◽

Dianshi Xiao ◽

...

Keyword(s):

Source Rock ◽

Shale Gas ◽

Sichuan Basin ◽

Gas Content ◽

Potential Zone ◽

Hydrocarbon Generation ◽

Gas Generation ◽

Longmaxi Formation ◽

Siliceous Shale ◽

Organic Pores

In order to analyze the main factors controlling shale gas accumulation and to predict the potential zone for shale gas exploration, the heterogeneous characteristics of the source rock and reservoir of the Wufeng-Longmaxi Formation in Sichuan Basin were discussed in detail, based on the data of petrology, sedimentology, reservoir physical properties and gas content. On this basis, the effect of coupling between source rock and reservoir on shale gas generation and reservation has been analyzed. The Wufeng-Longmaxi Formation black shale in the Sichuan Basin has been divided into 5 types of lithofacies, i.e., carbonaceous siliceous shale, carbonaceous argillaceous shale, composite shale, silty shale, and argillaceous shale, and 4 types of sedimentary microfacies, i.e., carbonaceous siliceous deep shelf, carbonaceous argillaceous deep shelf, silty argillaceous shallow shelf, and argillaceous shallow shelf. The total organic carbon (TOC) content ranged from 0.5% to 6.0% (mean 2.54%), which gradually decreased vertically from the bottom to the top and was controlled by the oxygen content of the bottom water. Most of the organic matter was sapropel in a high-over thermal maturity. The shale reservoir of Wufeng-Longmaxi Formation was characterized by low porosity and low permeability. Pore types were mainly <10 nm organic pores, especially in the lower member of the Longmaxi Formation. The size of organic pores increased sharply in the upper member of the Longmaxi Formation. The volumes of methane adsorption were between 1.431 m3/t and 3.719 m3/t, and the total gas contents were between 0.44 m3/t and 5.19 m3/t, both of which gradually decreased from the bottom upwards. Shale with a high TOC content in the carbonaceous siliceous/argillaceous deep shelf is considered to have significant potential for hydrocarbon generation and storage capacity for gas preservation, providing favorable conditions of the source rock and reservoir for shale gas.

Download Full-text