Controls of the Chemical Composition of Geothermal Waters

1987 ◽  
pp. 323-353 ◽  
Author(s):  
Gil Michard
Keyword(s):  
Chemical Composition ◽  
Geothermal Waters

The Potential Water Quality Impacts of Shale Gas Exploitation

2020 ◽  
Author(s):  
Hsiao-Yuan Tammy Hsu ◽  
Fred Worrall ◽  
Andy Aplin
Keyword(s):  
Chemical Composition ◽  
Hydraulic Fracturing ◽  
Shale Gas ◽  
Fluid Composition ◽  
Potential Contribution ◽  
Sources Of Information ◽  
Geothermal Waters ◽  
Rock Interaction ◽  
The Uk

<p>     The potential development of shale gas has brought with it several concerns about environmental impacts, these include: induced seismicity, air pollution, and groundwater contamination. During hydraulic fracturing for shale gas, large volumes of oxic and acidic water are injected into the gas-bearing formations. The injected fluids contain a range of additives and will mix and react with the in-situ groundwater and shale rock with the potential to drive water-rock interactions; release metal contaminants; alter the permeability of the bedrock; with each of these affecting the transport and recovery of water, hydrocarbons, and contamination. The purpose of this study is to understand the geochemical processes and inorganic metals release during hydraulic fracturing to assess the potential contribution of fluid-rock interaction for the composition of produced waters and alteration of shale mechanical properties.<br>     The study has: <br>i) Statistically analysed the chemical composition of hydraulic fracturing in USGS dataset to create prior distributions for the prediction of the salinity and chemical composition of flowback fluids in the UK. <br>ii) Statistically analysed the composition and controls on geothermal waters in the UK. Deep geothermal waters are an analogue for the in-situ groundwater composition with which injected fracking fluids will react and mix.<br>iii) Both sources of information have assisted in the design of the high pressure, high temperature experiments that will simulate the fracking fluid processes<br>iv) Undertaken sequential extraction of target shales to understand the data from existing batch experiments undertaker</p><p>     Future work will include isotope proxy and mineralogical texture studies to predict flowback fluid composition and the post-frack condition of the shale.</p>

Physico-chemical characterization of geothermal water from wells 1704 Săcuieni and 752 Săcuieni in north-western Romania with ternary diagrams

2010 ◽  
Vol 1 (1-2) ◽  
pp. 31-34
Author(s):  
A. Setel ◽  
M. Sebesan ◽  
B. Gabriela ◽  
A. Craciun Cornel ◽  
R. Sebesan
Keyword(s):  
Chemical Composition ◽  
Chemical Characterization ◽  
Calculation Model ◽  
Ternary Diagram ◽  
Geothermal Water ◽  
Geothermal Waters ◽  
Ternary Diagrams ◽  
Geothermal Fluids ◽  
Physico Chemical ◽  
Major Anions

Abstract In this paper presents ternary diagrams for geothermal waters from two wells in Săcuieni: ternary diagram Na-K-Mg, ternary diagram Cl-SO4-HCO3 and calculation model, which allows location of geothermal fluids in these diagrams. Classification of geothermal water with the two diagrams, involving knowledge of their chemical composition. Thus, it was the chemical composition of geothermal water coming from drillings: 1704 Săcuieni and 752 Săcuieni, situated in Bihor county. Location of geothermal water on the two diagrams we will establish the type of water, depending to the presence in their content of major anions and cations, what is of great importance for use in various purposes of the geothermal fluids.

scholarly journals The assessing of the quality of geothermal reservoirs on the example of the Lower Triassic aquifer in the Mogilno-Łódź Trough (Polish Lowlands)

2020 ◽  
Vol 154 ◽  
pp. 05001
Author(s):  
Aleksandra Kasztelewicz ◽  
Barbara Tomaszewska
Keyword(s):  
Grain Size ◽  
Chemical Composition ◽  
High Temperatures ◽  
Lower Triassic ◽  
Geothermal Reservoir ◽  
Geothermal Waters ◽  
Geothermal Reservoirs ◽  
Temperature Ranges

Petrographic and petrophysical investigations of the aquifers allow to estimate their productivity and infectivity, as well as allow for better recognition of the origin of the chemical composition of geothermal waters. Deep deposition of the Lower Triassic sediments in the analysed area (locally above 5000 m b.s.l.) is conducive to high temperatures (above 90°C) within the reservoir and causes deterioration of reservoir parameters. The Lower Triassic geothermal reservoir consists of fine and mixed grain- size sands and sandstones layers from 10 to 650 m thick; depending on the depth. The water within the reservoir exhibits mineralization ranging from 2 to over 100 g L-1 and its temperature ranges from 30 to 100°C. The mineralization of waters varies from 140 g/dm3 (Warsaw basin) to over 350 g/dm3 in the deep zones of the basin (axial fragments of the Mogileńsko-Łódź trough). The average permeability of reservoir layers in the Polish Lowlands is 145.5 mD.

scholarly journals Hydrogeochemical Characteristics of Geothermal Waters from Mesozoic Formations in the Basement of the Central Part of the Carpathian Foredeep and the Carpathians (Poland) Using Multivariate Statistical Methods

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4022
Author(s):  
Joanna Jasnos
Keyword(s):  
Chemical Composition ◽  
Water Exchange ◽  
Statistical Tests ◽  
Principal Component ◽  
Multivariate Statistical ◽  
Geothermal Waters ◽  
Preliminary Identification ◽  
Carpathian Foredeep ◽  
Outer Carpathians ◽  
Areas Of Interest

The subject of this study is the chemical composition of potentially geothermal waters of the Mesozoic basement of the central part of the Carpathian Foredeep and the Outer Carpathians regions. The research objectives were: (1) to identify statistically significant differences between the chemical composition of waters from the Cretaceous, Jurassic, and Triassic aquifers, and between the waters of both regions; and (2) the discovery of zones indicating active water exchange—attractive due to the operational efficiency of wells. Knowledge of the chemical composition of water allows for the preliminary identification of areas of interest for the exploitation of water for recreational, healing, and heating purposes. The research methods used were: (1) statistical tests and (2) methods of multivariate data analysis, such as the Kruskal–Wallis test and Principal Component Analysis (PCA). The performed tests and statistical analyses allowed us to draw conclusions about significant differences between the chemical composition of waters from the Cretaceous, Jurassic, and Triassic aquifers, and the basement of the Carpathian Foredeep and the Outer Carpathians. They indicated the existence of a zone with symptoms of active water exchange. Before establishing the fact of active exchange of waters in this zone, further research should be undertaken.

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

On the Inhomogeneity of Chemical Composition over the Surface of 21 Per

1976 ◽  
Vol 32 ◽  
pp. 343-349
Author(s):  
Yu.V. Glagolevsky ◽  
K.I. Kozlova ◽  
V.S. Lebedev ◽  
N.S. Polosukhina
Keyword(s):  
Chemical Composition ◽  
Spectral Line ◽  
Variable Star ◽  
Radial Velocities ◽  
Crimean Astrophysical Observatory ◽  
Line Intensities ◽  
Magnetic Variable

SummaryThe magnetic variable star 21 Per has been studied from 4 and 8 Å/mm spectra obtained with the 2.6 - meter reflector of the Crimean Astrophysical Observatory. Spectral line intensities (Wλ) and radial velocities (Vr) have been measured.

Structural Studies on Mitotic Spindle Fibres

1978 ◽  
Vol 36 (3) ◽  
pp. 615-626
Author(s):  
J.R. Mcintosh
Keyword(s):  
Chemical Composition ◽  
Mitotic Spindle ◽  
Structural Studies ◽  
Mitotic Apparatus ◽  
Chemical Studies ◽  
Medical Interest ◽  
Spindle Fibres

The mitotic apparatus is a structure of obvious biological and medical interest, but it has proved to be a difficult cellular machine to understand. The chemical composition of the spindle is only slightly elucidated, largely because of the difficulties in preparing useful isolates of the structure. Chemical studies of the mitotic spindle have been reviewed elsewhere (Mcintosh, 1977), and will not be discussed further here. One would think that structural studies on the mitotic apparatus (MA) in situ would be straightforward, but even with this approach there is some disagreement in the results obtained with various methods and by different investigators. In this paper I will review briefly the approaches which have been used in structural studies of the MA, pointing out the strengths and problems of each approach. I will summarize the principal findings of the different methods, and identify what seem to be fruitful avenues for further work.

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