Oil & Gas Geology ›› 2023, Vol. 44 ›› Issue (5): 1321-1332.doi: 10.11743/ogg20230520
• Methods and Technologies • Previous Articles Next Articles
Shan ZHAO1,2(), Hua LIU1,2, Xianzhang YANG3, Yongfeng ZHU3, Shen WANG1,2, Ke ZHANG3, Xin WEI1,2
Received:
2023-03-13
Revised:
2023-06-30
Online:
2023-10-19
Published:
2023-10-19
CLC Number:
Shan ZHAO, Hua LIU, Xianzhang YANG, Yongfeng ZHU, Shen WANG, Ke ZHANG, Xin WEI. Evolutionary characteristics of sealing capacity of deep salt caprocks under temperature-pressure coupling[J]. Oil & Gas Geology, 2023, 44(5): 1321-1332.
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Table 1
Salt rock sample information"
实验项目 | 样品编号 | 围压/MPa | 设定温度/℃ | 样品质量/g | 高度/mm | 直径/mm |
---|---|---|---|---|---|---|
恒温变压 | S1 | 5 | 20 | 52.84 | 50.49 | 24.91 |
S2 | 10 | 20 | 53.39 | 50.05 | 24.88 | |
S3 | 30 | 20 | 52.55 | 50.11 | 24.98 | |
S4 | 60 | 20 | 52.33 | 50.11 | 25.05 | |
S5 | 80 | 20 | 52.54 | 50.59 | 24.92 | |
恒压变温 | S6 | 20 | 40 | — | — | — |
S7 | 20 | 60 | — | — | — | |
S8 | 20 | 80 | — | — | — | |
S9 | 20 | 100 | — | — | — | |
温-压耦合 | S10 | 5 | 30 | 53.91 | 50.07 | 24.86 |
S11 | 10 | 40 | 52.73 | 50.11 | 24.90 | |
S12 | 30 | 85 | 53.13 | 50.54 | 24.94 | |
S13 | 60 | 150 | 52.50 | 50.07 | 24.94 |
Table 2
Statistical table of triaxial stress-strain experimental results of salt rock under three types of experimental conditions"
实验条件 | 样品编号 | 围压/MPa | 温度/℃ | 盐岩强度/MPa |
---|---|---|---|---|
恒温变压 | S1 | 5 | 20 | 35.35* |
S2 | 10 | 20 | 43.57 | |
S3 | 30 | 20 | 41.07 | |
S4 | 60 | 20 | 37.50 | |
S5 | 80 | 20 | 29.64 | |
恒压变温 | S6 | 20 | 40 | 30.83 |
S7 | 20 | 60 | 27.42 | |
S8 | 20 | 80 | 22.76 | |
S9 | 20 | 100 | 17.09 | |
温-压耦合 | S10 | 5 | 30 | 35.59 |
S11 | 10 | 40 | 31.19 | |
S12 | 30 | 85 | 13.90 | |
S13 | 60 | 150 | 10.84 |
Table 3
Statistical table of elastic modulus and post-peak softening modulus of salt rock under constant temperature-variable pressure, and temperature-pressure coupling conditions"
项目 | 样品编号 | 围压/ MPa | 温度/ ℃ | 弹性模量(E)/ GPa | 峰值后软化模量(M) / GPa | BDI |
---|---|---|---|---|---|---|
恒温变压 | S1 | 5 | 20 | 3.73 | -2.06 | 0.36 |
S2 | 10 | 20 | 2.59 | 3.41 | 4.13 | |
S3 | 30 | 20 | 2.28 | 2.75 | 5.90 | |
S4 | 60 | 20 | 1.51 | 1.79 | 6.42 | |
S5 | 80 | 20 | 1.41 | 1.56 | 10.52 | |
温-压耦合 | S10 | 5 | 30 | 1.98 | 2.28 | 7.46 |
S11 | 10 | 40 | 1.80 | 2.01 | 9.61 | |
S12 | 30 | 85 | 1.10 | 1.22 | 10.15 | |
S13 | 60 | 150 | 0.39 | 0.43 | 11.02 |
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