Diagenetic Evolution of Marine Carbonate Reservoirs: A Case Study from M5_1-2 Submember of Middle Ordovician Majiagou Formation in SE Ordos Basin, China

Table 2

Fluid inclusion characteristics of M5_1-2 submember of Middle Ordovician Majiagou Formation in Yan’an area.

Well	Feature	Formation	Depth (m)	Size (μm)	Gas-liquid ratio (%)	Homogenization temperature (°C)	Salinity (wt.% eq. NaCl)
A1510	Fracture-filling calcite	M51^2	2841.75	5 to 20	4 to 15	129.4 to 156.4	11.1 to 18.9
A697	Fracture-filling calcite	M51^1-2	3226.26	6 to 20	1 to 10	93.6 to 149.3	13.7 to 21.7
A147	Fracture-filling calcite	M51^2-4	2583.80	2 to 8	3 to 5	86 to 136.5	4.6 to 16.3
A156	Fracture-filling calcite	M51^2	3619.25	4 to 18	3 to 5	112 to 218.4	7.3 to 17.9
A1508	Dissolution pores filled with calcite	M52	2754.68	5 to 10	2 to 10	91.1 to 123.7	15.2 to 21.5
A117	Dissolution pores filled with calcite	M51^3-4	2749.67	3 to 12	5 to 8	112 to 179.3	6.4 to 10.38
A110	Dissolution pores filled with calcite	M51^1-3	2531.60	2 to 10	3 to 8	94 to 169.5	5.3 to 15.4
A108	Dissolution pores filled with calcite	M51^1-3	2456.50	2 to 15	5 to 8	102.1 to 135.4	7.8 to 16.7
A103	Dissolution pores filled with calcite	M51^4	3047.70	2 to 17	5 to 8	98 to 143.7	10.3 to 16.4
A413	Dissolution pores filled with calcite	M51^2	3533.28	4 to 13	4 to 6	96 to 152.9	9.5 to 20.7
A265	Dissolution pores filled with calcite	M51^4	2898.05	3 to 16	4 to 6	90 to 133.4	10.4 to 21.5