Geothermal Energy

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Table 2 Initial fracture permeability values and rock types based on previous studies (Bodvarsson et al. 1990; Zakharova and Spichak 2012; Snæbjörnsdóttir et al. 2014) and geologic model, and calibrated permeability values with additional rock types illustrated in Fig. 7

From: Numerical modeling of reinjection and tracer transport in a shallow aquifer, Nesjavellir Geothermal System, Iceland

Original values				Calibrated values
ROCK TYPE	Permeability (m²)			ROCK TYPE	Permeability (m²)
	(kx)	(ky)	(kz)		(kx)	(ky)	(kz)
GRA00	5E10⁻¹⁰	5E10⁻¹⁰	1E10⁻¹¹	GRA00	1E10⁻⁰⁹	1E10⁻⁰⁹	1E10⁻¹¹
GRU00	1E10⁻¹⁴	1E10⁻¹⁴	1E10⁻¹⁵	GRU00	1E10⁻¹⁴	1E10⁻¹⁴	1E10⁻¹⁵
HAG00	1E10⁻¹³	1E10⁻¹³	1E10⁻¹⁵	HAG00	1E10⁻⁰⁹	1E10⁻⁰⁹	1E10⁻¹⁵
NES00	1E10⁻¹³	1E10⁻¹³	1E10⁻¹⁵	NES00	1E10⁻⁰⁹	1E10⁻⁰⁹	1E10⁻¹⁵
FAUH0	1E10⁻¹⁶	1E10⁻¹⁶	1E10⁻¹⁶	FAUH0	1E10⁻¹⁶	1E10⁻¹⁶	1E10⁻¹⁶
FAU10	1E10⁻¹²	1E10⁻¹²	1E10⁻¹³	FAU10	3E10⁻¹¹	5E10⁻¹⁰	5E10⁻¹³
FAU20	–	–	–	FAU20	3E10⁻¹²	5E10⁻¹¹	5E10⁻¹³
FAU30	–	–	–	FAU30	3E10⁻¹²	5E10⁻¹²	5E10⁻¹³
BOUN0	1E10⁻¹⁶	1E10⁻¹⁶	1E10⁻¹⁶	BOUN0	1E10⁻¹⁶	1E10⁻¹⁶	1E10⁻¹⁶
				FEED0	1E10⁻¹¹	1E10⁻¹¹	5E10⁻¹⁴
				CHN10	9E10⁻⁰⁹	9E10⁻⁰⁹	1E10⁻¹⁵
				CHN20	8E10⁻⁰⁹	8E10⁻⁰⁹	1E10⁻¹⁵
				CHN30	9E10⁻⁰⁹	9E10⁻⁰⁹	1E10⁻¹⁵
				QDTP0	1E10⁻¹⁶	1E10⁻¹⁶	5E10⁻¹⁶

The matrix permeability used for all rock types is 1E10⁻¹⁶ m²

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