Study of Diagenesis and Pore Evolution of Triassic Jialingjiang Formation in Southern Puguang Gasfield

Table 1

Carbon and oxygen isotopic sampling data for carbonate rocks.

Order	Sample description	Well	Layers	Depth (m)	δ^13C; PDB ()	δ^18O; PDB ()
1	Dolomicrite	S1	T1j^2	3568.89–3568.93	1.62	−3.66
2	Calcareous dolarenite	S1	T1j^2	3571.51–3571.56	0.84	−3.92
3	Gypseous dolomicrite	S1	T1j^2	3571.8–3572.1	−0.58	−3.71
4	Argillaceous gypsodolomite	S1	T1j^2	3576.9–3577	4.77	−3.12
5	Globular dolomite	S1	T1j^2	3580.7–3580.26	4.54	−2.62
6	Gypsodolomite	S1	T1j^2	3583.1–3583.21	4.88	−3.02
7	Gypseous dolarenite	S1	T1j^2	3585.04–3585.16	4.88	−3.37
8	Dolarenite	S1	T1j^2	3586.58–3586.76	5.12	−4.33
9	Gypseous dolomicrite	S1	T1j^2	3586.79–3586.95	4.34	−4.35
10	Fine silty dolomite	S2	T1j^2	3648.94–3649.23	1.47	−5.78
11	Fine silty dolomite	S2	T1j^2	3651.19–3651.43	1.55	−2.62
12	Fine silty gypsodolomite	S2	T1j^2	3654.96–3655.12	4.93	−2.79
13	Gypsodolomite	S2	T1j^2	3666.35–3666.44	6.2	−4.43
14	Fine silty dolomite	S3	T1j^2	2364.6–2364.66	3.67	−5.22
15	Fine silty dolarenite	S3	T1j^2	2366.53–2366.65	−0.81	−3.43
16	Calcite dolomite	S3	T1j^2	2374.15–2374.23	1.57	−3.88
17	Calcite dolomite	S3	T1j^2	2378.64–2378.75	0.28	−5.15
18	Microspar dolarenite	S3	T1j^2	2378.75–2379.1	−3.18	−5.35
19	Gypsodolomite	S4	T1j^2	3827.79–3827.89	3.15	−2.61
20	Sparry gypsodolomite	S4	T1j^2	3828.22–3828.35	4.12	−2.88
21	Granular gypsodolomite	S4	T1j^2	3828.85–3828.96	4.25	−2.78
22	Fine silty gypsodolomite	S4	T1j^2	3830.45–3830.58	4.68	−5.32
23	Laminated fine silty dolomite	S4	T1j^2	3831.6–3831.72	5.22	−3.56
24	Fine silty dolomite	S4	T1j^2	3832.52–3832.64	5.32	−3.87