Diagenetic Modifications and Reservoir Heterogeneity Associated with Magmatic Intrusions in the Devonian Khyber Limestone, Peshawar Basin, NW Pakistan

Table 1

Data set of various diagenetic phases showing mineral composition in percentage, carbon and oxygen isotopes, and porosity/permeability data. LS: limestone, DM: dolomitic marble, M: marble, CC: calcite, Dedol: dedolomite.

Sr. No.	Facies type	Mineralogy			Isotope analyses			Reservoir properties
		Calcite (%)	Dolomite (%)	Others (%)	δ^18O	δ^18O	δ^13C	Porosity (%)	Permeability (mD)
					(V-PDB)	(SMOW)	(V-PDB)
1	LS	92		Quartz (8)
2	LS	100	0		-4.57	26.2	1.49	6.18	1.5
3	LS	91	0	Quartz (9)	-5.87	24.86	1.85	5.63	2.8
4	LS	90		Quartz (10)				6.88	2.5
5	Dol. I		97	Quartz (3)	-14.42	16.04	1.85
6	Dol. I		77	Quartz (23)	-9.1	21.53	-2.05	6.56	0.6
7	Dol. I		82	Quartz (18)				5.79	0.1
8	Dol. I		79	Quartz (21)
9	Dol. I		93	Quartz (7)				5.35	0.1
10	Dol. I				-15.83	14.6	2
11	Dol. I		90	Quartz (10)
12	M	56	0	Ankerite (36); Quartz (8)				4.66	0.5
13	M	88	0	Quartz (12)				3.25	0.9
14	M	98	2
15	M	100
16	M	85		Quartz (15)	-9.15	21.48	-1.98
17	M	93	0	Quartz (7)	-8.78	21.86	-2.25	3.76	0.8
18	Dol. II		100					9.02	1.1
19	Dol. II	95	5					9.31	2
20	Dol. II	88	12					7.65	2.5
21	Dol. II	3	97		-13.93	16.55	1.58	9.91	1.1
22	Dol. II	9	91				1.89
23	Dol. II	4	96		-13.76	16.72	1.89	8.07	2
24	Dol. II							10.48	1.8
25	DM	75	25					8.21	9.4
26	DM	71	29		-8.51	22.14	-2.42	7.56	8.2
27	DM	78	22
28	DM	85	15
29	DM	71	29		-8.63	22.01	-2.58	13.2	13.3
30	DM	76	24
31	DM	73	27		-8.47	22.18	-2.48
32	DM	71	29					12.9	11.9
33	DM	65	35		-9.64	20.97	-2.33
34	DM	89	19
35	DM	81	11					6.66	8.8
36	DM		94	Pentlandite (6)	-13.69	16.8	1.85	14.7	12.8
37	DM	73	27		-8.78	21.86	-2.69
38	CC	91	9		-6.11	24.61	-7.12	—	—
39	Dedol.		88	Quartz (12)	-6.41	24.3	-5.14