The Oil-Bearing Strata of Permian Deposits of the Ashal’cha Oil Field Depending on the Content, Composition, and Thermal Effects of Organic Matter Oxidation in the Rocks
Table 4
Thermal analysis data obtained by DSC of rock samples from different interval selections of the Permian sediments of the Ashal’cha oil field.
Sample no.
Heat effect of water evaporation (J/g)
Water evaporation temperature (°С)
The beginning of the process of oil oxidation (°C)
Low-temperature oxidation (LТО), 200-350°С
High-temperature oxidation (HТО), 350-600°С
Thermal effect (J/g) ()
Indicator ()
Thermal effect (J/g) (S1)
Тemperature (°С)
Thermal effect (J/g) (S2)
Тemperature (°С)
Well 24 (117.5-132 m)
1
-9.72
129.0
211.4
941.3
250
665.1
410
1606.4
1.41
2
-58.2
119.7
211.9
805.3
254
562.2
400
1367.5
1.43
3
—
—
234.5
111.4
265
62.6
398
174.0
1.78
Well 9 (148.1-149.7 m)
5
-30.95
104.9
236.1
223.8
264
142.2
402
366.0
1.57
Well 106 (174.4-177.6 m)
7
-47.83
101.3
227.9
402.5
247
248.2
395
650.7
1.62
Well 107 (181-182.7 m)
10
—
—
227.5
606.6
252
456.7
415
1063.3
1.33
Sample 1—depth 117.5-118.5 m; sample 2—121-123.5 m; sample 3—129-132 m. Sample no. See Tables 1, 2, and 3.
