Cements, Waters, and Scales: An Integrated Study of the Szeged Geothermal Systems (SE Hungary) to Characterize Natural Environmental Conditions of the Thermal Aquifer
Table 2
General hydrochemical properties of the investigated production (p) and reinjection (r) wells. Data for famous spas in Szeged are also shown for comparison.
Well ID
B–415 p
B–748 p
B–744 r
B–745 r
B–746 r
B–747 r
Anna well
Dóra II well
Bottom depth (m)
1999
1937
1396
1750
1740
1225
944
1706
Depth of screens (m)
1727–1914
1733–1878
1112–1381
1636–1741
1519–1710
1012–1150
n.d.
n.d.
Number of filtered sections
6
3
5
3
3
4
n.d.
n.d.
Effluent water temperature(°C)
79.8
76.9
55.7
75.6
64.5
54.9
52
80
Water yield (m3/h)
39
54
56
35
78
72
n.d.
n.d.
Dissolved ions (mg/l)
Na+
1450
1420
1270
870
830
450
350
830
K+
18.2
19.5
15.3
10.8
8.5
3.4
2.2
8.3
Li+
0.24
0.26
0.15
0.16
0.12
0.02
n.d.
0.13
NH4+
20.8
23.3
15.2
17.6
18.0
3.0
1.7
49.0
Ca2+
10.1
11.2
1.5
5.0
6.5
6.4
2.1
8.9
Mg2+
3.2
3.5
1.2
1.7
1.9
2.8
1.7
2.9
Fe (total)
0.39
0.07
0.17
2.20
0.96
1.69
0.17
0.35
Cl−
420
350
245
27
40
123
35
44
Br−
3.20
6.30
3.20
0.32
0.22
0.33
n.d.
0.26
I−
3.20
3.10
1.90
0.11
0.09
0.12
0.08
0.15
F−
2.90
2.30
2.00
3.00
4.00
1.38
1.20
2.60
SO42−
70
44
<10
<10
<10
<10
<10
25
HCO3−
2870
3180
2500
2370
2280
1010
810
2196
TDS (mg/l)
5430
6350
4640
3480
3210
1670
2809
3169
pH
8.3
7.3
8.5
7.5
8.2
7.8
7.8
n.d.
Phenol index (μg/l)
1852
2040
1600
1740
273
<5
n.d.
n.d.
Total methane (l/m3)
958
809
303
106
84
16
n.d.
n.d.
CO2 (l/m3)
167
199
5
72
38
<1
n.d.
n.d.
LSI
1.66
0.7
0.58
0.42
1.04
0.36
−0.51
—
RSI
4.98
5.9
7.34
6.65
6.12
7.07
8.82
—
Abbreviations: n.d. = no data; TDS = total dissolved solids; LSI = Langelier Stability Index; RSI = Ryznar Stability Index [41].
