|
|
Shale gas extraction
Podhorský, Jakub ; Brázdil, Marian (referee) ; Šnajdárek, Ladislav (advisor)
This bachelor’s thesis on Shale gas extraction describes extraction and world shale gas resources. At the beginning it provides introduction to the terms of geology and overview of historical evolution of extraction and crucial technologies that are currently used in extraction. Shale gas exploration and extraction development is briefly mentioned. Horizontal drilling and hydraulic fracturing is then further described and also summary of the equipment is provided. Potential environmental risks associated with extraction or hydraulic fracturing itself are described. Subsequently world shale gas resources and potential extraction places are described. World technically recoverable resources are estimated at 7245 Tcf. Shale gas commercial production is currently underway in the United States, Canada and China.
|
|
|
Interpretation of regional faults at the Carboniferous structural level and experiences with manifestation of stress in vicinity faults at the area of the power plant Dětmarovice
Waclawik, Petr ; Ptáček, Jiří ; Vavro, Martin
The expert assessment deals the interpretation of regional faults, the assessment of their possible recent activity and summary of experiences with manifestation of stress in vicinity faults during OKR mining activity at the level of the Carboniferous structural floor. The results of the assessment will be used to assess the possible tectonic influence of faults in the area of the power plant Dětmarovice, especially in connection with the geophysical works. The interpretation of regional faults is based on knowledge of the geological structure of the Carboniferous structural level and on the basis of experience with stress and deformation manifestations during the drivage of mine excavations. The expert evaluation take into consideration the structural-tectonic development and tectonic conditions of the basin, which are conditioned by the overall deformational development of the Variscan orogen. There are also the summary of available technical documents, which could be useful for the geological assessment of the underlying bed and the assessment of the possible effects of induced seismicity in the interest area of power plant Dětmarovice.
|
|
|
Statistical analysis of natural and induced seismicity catalogues
Mazanec, Martin ; Eisner, Leo (advisor) ; Adamová, Petra (referee)
The main goal of this thesis is to analyze the statistical properties of seismic catalogues of natural and induced seismicity, identify similarities and differences. We compare statistical temporal and magnitude information contained in different types of earthquake catalogues. Six seismostatistical criteria used for identification of natural swarms and mainshock- aftershock earthquake sequences are applied to 10 different catalogues of natural and induced seismicity. We did not find a method to reliably distinguish between natural and induced seismicity based only on temporal and magnitude information contained in catalogues. We show that induced seismicity catalogues are similar to natural earthquake swarms. We report how the set of 6 criteria presented here can be used for distinguishing between mainshock-aftershock sequences and swarm seismicity. We also show that none of the tested criteria can be used independently for distinguishing between different types of seismicity.
|
|
|
Statistical analysis of natural and induced seismicity catalogues
Mazanec, Martin ; Eisner, Leo (advisor) ; Adamová, Petra (referee)
The main goal of this thesis is to analyze the statistical properties of seismic catalogues of natural and induced seismicity, identify similarities and differences. We compare statistical temporal and magnitude information contained in different types of earthquake catalogues. Six seismostatistical criteria used for identification of natural swarms and mainshock- aftershock earthquake sequences are applied to 10 different catalogues of natural and induced seismicity. We did not find a method to reliably distinguish between natural and induced seismicity based only on temporal and magnitude information contained in catalogues. We show that induced seismicity catalogues are similar to natural earthquake swarms. We report how the set of 6 criteria presented here can be used for distinguishing between mainshock-aftershock sequences and swarm seismicity. We also show that none of the tested criteria can be used independently for distinguishing between different types of seismicity.
|
|
|
Shale gas extraction
Podhorský, Jakub ; Brázdil, Marian (referee) ; Šnajdárek, Ladislav (advisor)
This bachelor’s thesis on Shale gas extraction describes extraction and world shale gas resources. At the beginning it provides introduction to the terms of geology and overview of historical evolution of extraction and crucial technologies that are currently used in extraction. Shale gas exploration and extraction development is briefly mentioned. Horizontal drilling and hydraulic fracturing is then further described and also summary of the equipment is provided. Potential environmental risks associated with extraction or hydraulic fracturing itself are described. Subsequently world shale gas resources and potential extraction places are described. World technically recoverable resources are estimated at 7245 Tcf. Shale gas commercial production is currently underway in the United States, Canada and China.
|
|
| |
|
| |
|
|
Modelling of the mining induced seismicity impact on the surface structures using Plaxis computing system
Hrubešová, E. ; Kaláb, Zdeněk
The excavated coal deposits in the Karviná mine district are situated close to the surface structures and this excavation can be manifested into the macroseismic effects on the surface. These effects can cause the troublesome physiological feeling of inhabitants and optionally, the defects of the building. In this paper there are presented the initial results of the seismic response modelling for the surface objects subjected to the mining seismicity. For the modelling the numerical system Plaxis (Holland) based on the FEM was used.
|
guest ::
