Research Article
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) | δ13C PDB () | δ18O PDB () |
| 1 | Dolomicrite | S1 | T1j2 | 3568.89–3568.93 | 1.62 | −3.66 | 2 | Calcareous dolarenite | S1 | T1j2 | 3571.51–3571.56 | 0.84 | −3.92 | 3 | Gypseous dolomicrite | S1 | T1j2 | 3571.8–3572.1 | −0.58 | −3.71 | 4 | Argillaceous gypsodolomite | S1 | T1j2 | 3576.9–3577 | 4.77 | −3.12 | 5 | Globular dolomite | S1 | T1j2 | 3580.7–3580.26 | 4.54 | −2.62 | 6 | Gypsodolomite | S1 | T1j2 | 3583.1–3583.21 | 4.88 | −3.02 | 7 | Gypseous dolarenite | S1 | T1j2 | 3585.04–3585.16 | 4.88 | −3.37 | 8 | Dolarenite | S1 | T1j2 | 3586.58–3586.76 | 5.12 | −4.33 | 9 | Gypseous dolomicrite | S1 | T1j2 | 3586.79–3586.95 | 4.34 | −4.35 | 10 | Fine silty dolomite | S2 | T1j2 | 3648.94–3649.23 | 1.47 | −5.78 | 11 | Fine silty dolomite | S2 | T1j2 | 3651.19–3651.43 | 1.55 | −2.62 | 12 | Fine silty gypsodolomite | S2 | T1j2 | 3654.96–3655.12 | 4.93 | −2.79 | 13 | Gypsodolomite | S2 | T1j2 | 3666.35–3666.44 | 6.2 | −4.43 | 14 | Fine silty dolomite | S3 | T1j2 | 2364.6–2364.66 | 3.67 | −5.22 | 15 | Fine silty dolarenite | S3 | T1j2 | 2366.53–2366.65 | −0.81 | −3.43 | 16 | Calcite dolomite | S3 | T1j2 | 2374.15–2374.23 | 1.57 | −3.88 | 17 | Calcite dolomite | S3 | T1j2 | 2378.64–2378.75 | 0.28 | −5.15 | 18 | Microspar dolarenite | S3 | T1j2 | 2378.75–2379.1 | −3.18 | −5.35 | 19 | Gypsodolomite | S4 | T1j2 | 3827.79–3827.89 | 3.15 | −2.61 | 20 | Sparry gypsodolomite | S4 | T1j2 | 3828.22–3828.35 | 4.12 | −2.88 | 21 | Granular gypsodolomite | S4 | T1j2 | 3828.85–3828.96 | 4.25 | −2.78 | 22 | Fine silty gypsodolomite | S4 | T1j2 | 3830.45–3830.58 | 4.68 | −5.32 | 23 | Laminated fine silty dolomite | S4 | T1j2 | 3831.6–3831.72 | 5.22 | −3.56 | 24 | Fine silty dolomite | S4 | T1j2 | 3832.52–3832.64 | 5.32 | −3.87 |
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