The influence of hydrothermal brine on the short-term strength and elastic modulus of sandstones from exploration well EPS-1 at Soultz-sous-Forêts (France)

Heap, Michael J.; Reuschlé, Thierry; Kushnir, Alexandra R. L.; Baud, Patrick

doi:10.1186/s40517-018-0116-1

Geothermal Energy

Science – Society – Technology

Table 4 Summary of the dry, water-saturated (wet), and brine-saturated (brine) uniaxial compressive strength experiments performed on the six sandstones sampled from exploration well EPS-1 at the Soultz-sous-Forêts geothermal site (France)

From: The influence of hydrothermal brine on the short-term strength and elastic modulus of sandstones from exploration well EPS-1 at Soultz-sous-Forêts (France)

Box number	Depth (m)	Unit	Connected porosity	Dry UCS (MPa)	Wet UCS (MPa)	Brine UCS (MPa)	Dry elastic modulus (GPa)	Wet elastic modulus (GPa)	Brine elastic modulus (GPa)
84	1008	Voltzia	0.108	–	89.8	–	–	22.5	–
84	1008	Voltzia	0.111	–	94.2	–	–	22.7	–
84	1008	Voltzia	0.108	–	85.9	–	–	19.7	–
84	1008	Voltzia	0.107	152.9	–	–	30.0	–	–
84	1008	Voltzia	0.114	146.0	–	–	26.5	–	–
84	1008	Voltzia	0.111	139.7	–	–	23.7	–	–
84	1008	Voltzia	0.109	–	–	94.6	–	–	24.3
84	1008	Voltzia	0.113	–	–	94.1	–	–	25.3
84	1008	Voltzia	0.114	–	–	94.3	–	–	24.3
100	1022	Intermédiaires	0.074	–	123.4	–	–	29.5	–
100	1022	Intermédiaires	0.074	–	124.5	–	–	30.7	–
100	1022	Intermédiaires	0.076	–	92.3	–	–	22.1	–
100	1022	Intermédiaires	0.077	132.1	–	–	26.6	–	–
100	1022	Intermédiaires	0.072	147.6	–	–	28.5	–	–
100	1022	Intermédiaires	0.073	148.5	–	–	28.4	–	–
100	1022	Intermédiaires	0.079	–	–	100.4	–	–	30.1
100	1022	Intermédiaires	0.080	–	86.8	–	–	19.5	–
100	1022	Intermédiaires	0.077	–	–	86.1	–	–	21.9
100	1022	Intermédiaires	0.075	–	–	96.1	–	–	23.0
157	1069	Karlstal	0.127	–	74.7	–	–	25.4	–
157	1069	Karlstal	0.125	–	71.8	–	–	25.9	–
157	1069	Karlstal	0.133	–	68.2	–	–	21.5	–
157	1069	Karlstal	0.126	–	85.7	–	–	25.6	–
157	1069	Karlstal	0.128	102.2	–	–	29.5	–	–
157	1069	Karlstal	0.130	103.3	–	–	27.9	–	–
157	1069	Karlstal	0.130	103.7	–	–	31.0	–	–
157	1069	Karlstal	0.128	–	–	90.8	–	–	28.0
157	1069	Karlstal	0.127	–	–	90.4	–	–	28.5
157	1069	Karlstal	0.130	–	–	89.2	–	–	28.6
198	1107	Karlstal	0.098	–	83.8	–	–	26.5	–
198	1107	Karlstal	0.092	–	82.9	–	–	24.5	–
198	1107	Karlstal	0.093	–	93.9	–	–	27.5	–
198	1107	Karlstal	0.099	107.9	–	–	31.6	–	–
198	1107	Karlstal	0.095	124.3	–	–	31.1	–	–
198	1107	Karlstal	0.091	117.4	–	–	29.9	–	–
198	1107	Karlstal	0.091	–	–	98.0	–	–	29.2
198	1107	Karlstal	0.102	–	94.6	–	–	31.4	–
198	1107	Karlstal	0.090	–	–	93.7	–	–	27.3
198	1107	Karlstal	0.091	–	–	93.6	–	–	27.3
402	1290	Trifels	0.138	–	64.8	–	–	19.2	–
402	1290	Trifels	0.139	–	61.8	–	–	18.6	–
402	1290	Trifels	0.146	–	61.9	–	–	19.4	–
402	1290	Trifels	0.146	–	53.4	–	–	14.9	–
402	1290	Trifels	0.147	95.8	–	–	20.7	–	–
402	1290	Trifels	0.145	90.1	–	–	22.2	–	–
402	1290	Trifels	0.149	84.1	–	–	19.9	–	–
402	1290	Trifels	0.142	–	–	63.8	–	–	19.0
402	1290	Trifels	0.138	–	–	63.2	–	–	19.1
402	1290	Trifels	0.146	–	–	62.1	–	–	20.4
402	1290	Trifels	0.148	–	–	62.8	–	–	19.6
540	1414	Anté-Annweiler	0.096	–	42.0	–	–	13.9	–
540	1414	Anté-Annweiler	0.102	–	42.2	–	–	14.3	–
540	1414	Anté-Annweiler	0.099	–	38.6	–	–	12.8	–
540	1414	Anté-Annweiler	0.098	72.1	–	–	18.0	–	–
540	1414	Anté-Annweiler	0.106	59.4	–	–	14.9	–	–
540	1414	Anté-Annweiler	0.102	61.8	–	–	16.2	–	–
540	1414	Anté-Annweiler	0.103	–	–	38.1	–	–	12.8
540	1414	Anté-Annweiler	0.094	–	–	41.0	–	–	12.7
540	1414	Anté-Annweiler	0.099	–	–	39.2	–	–	14.2

UCS uniaxial compressive strength

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