A Methodology for Assessing the Favourability of Geopressured-Geothermal Systems in Sedimentary Basin Plays: A Case Study in Abruzzo (Italy)

Table 2

Scores (S) of classes and weights (W) for layers of evidence, used in the favourability analysis.

Layer of evidence	Weight (W)	Unit	Score (S) favourability
			5 (very high)	4 (high)	3 (medium)	2 (low)	1 (very low)
Geopressured effective reservoir	0.4	m b.g.l. (depth of the top)	0–1500	1500–2500	2500–3500	3500–4500	>4500
Geochemistry	0.1		Clear indications of CH4-saturated waters				No indications of CH4-saturated waters
Pressure regime	0.3	Bar/100 m (pressure gradient)	>18.82	15.82–18.82	12.52–15.82	10.52–12.52	0–10.52
Thermal regime	0.1	°C/1000 m (geothermal gradient)	>50	40–50	30–40	15–30	0–15
Deposits thickness	0.1	m	>8000	6000–8000	4000–6000	2000–4000	0–2000