Porosity–permeability relationship derived from Upper Jurassic carbonate rock cores to assess the regional hydraulic matrix properties of the Malm reservoir in the South German Molasse Basin

Geothermal Energy

Science – Society – Technology

Table 3 Overview of porosity measurements from different projects for the Malm aquifer in the Bavarian Molasse Basin

Stratigraphy				Outcrop						Outcrop/subsurface				Subsurface
Epoch	Age	Quenstedt and Richter (1987)	STD (2016)	Hedtmann and Alber (2018)		Mraz et al. (2018)				Homuth (2014)				Dingolfing FB				Limestone^a	Dolostone^a	Moosburg SC 4						Pullach (Th 2)^b	Unterhaching (Gt Uha 1/1a)^c
				Hedtmann and Alber (2018)		Mraz et al. (2018)				Homuth (2014)				This study^d				Limestone^a	Dolostone^a	Böhm (2012)		This study^d				Pullach (Th 2)^b	Unterhaching (Gt Uha 1/1a)^c
				Mean	n	Min	Max	Med	n	Min	Max	Med	n	Min	Max	Med ± MAD	n	Min–Max (Med)		Min–Max (Med)	n	Min	Max	Med ± MAD	n	Min–Max (Med)
Early Cretaceous		Purbeck																				0.5	17.3	4.6 ± 2.5	73	< 3.0 n = 5
Late Jurassic	Tithonian	Malm ζ 4–5	Rennertshofen & Usseltal Fm.							< 0.1	17.8	5.1	381	3.3	15.7	10.7 ± 5.1	6	0.7–17.1 (3.8), n = 14	1.5–6.7 (3.2), n = 9			3.1	19.2	13.6 ± 4.5	32	5.0–10.0 n = 10
		Malm ζ 3	Mörnsheim Fm.			5.6	8.6	7.0	13					3.3	15.7	10.7 ± 5.1	6					2.5	3.9	3.1 ± 0.3	18		9.0 n = 2
		Malm ζ 2	Altmülthal Fm.			3.7	14.8	7.0	31					1.8	17.7	3.5 ± 1.8	9			0.6–2.1 (0.7)	3	0.3	10.2	5.6 ± 3.4	35		1.0–4.0 (2.5), n = 4
		Malm ζ 1	Geisental Fm.	5.8	25	4.0	8.5	5.8	21					4.2	12.2	9.2 ± 3.9	5			0.9 – 17.1 (7.3)	5	0.3	18.4	2.1 ± 1.5	32
	Kimmeridgian	Malm ε	Torleite Fm.	5.8	25	3.6	11.2	6.9	13	0.9	10.4	9.6	81	2.5	12.7	4.6 ± 1.1	19			1.1 – 5.4 (3.3)	2	0.5	5.9	2.9 ± 1.7	19
		Malm δ	Treuchtlingen Fm.	8.4	28	1.6	6.9	4.6	29	0.4	6.9	2.7	226	2.3	6.3	3.2 ± 0.7	12			2.4 – 7.6 (5.0)	2	0.7	4.7	2.3 ± 1.1	36	< 5.0 n = 3	6.0–18.0 (14.0), n = 4
		Malm γ	Arzberg Fm.							< 0.1	7.5	1.8	112							1.4	1	1.1	3.2	2.0 ± 0.3	15
	Oxfordian	Malm β	Dietfurt Fm.							0.2	10.2	3.3	181									0.4	3.5	2.0 ± 0.3	14
	Oxfordian	Malm α	Dietfurt Fm.							0.5	9.9	6.2	145									0.3	10.3	1.0 ± 0.5	18
Middle Jurassic		Dogger ζ																				3.8	15.4	7.9 ± 2.4	20

^aKoch et al. (2009), ^bBöhm et al. (2010), ^cBeichel et al. (2014), ^dporosity effective for water \(\phi_{\text{eff}}^{\text{w}}\), unit = %, Min minimum, Max maximum, Med median, MAD median absolute deviation, n count