Oil & Gas Geology ›› 2021, Vol. 42 ›› Issue (4): 981-991.doi: 10.11743/ogg20210418
• Methods and Technologies • Previous Articles Next Articles
Zhiyuan Liu(), Hao Li, Qingzhao Wu, Zeyu Nan, Junlei Su, Wujun Jin
Received:
2020-10-12
Online:
2021-08-28
Published:
2021-08-27
CLC Number:
Zhiyuan Liu, Hao Li, Qingzhao Wu, Zeyu Nan, Junlei Su, Wujun Jin. Characteristics and application effect of logging-based fracture identification in tight sandstones: A case study of the Upper Triassic Xu 2 Member in Western Sichuan Depression, Sichuan Basin[J]. Oil & Gas Geology, 2021, 42(4): 981-991.
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Table 1
Code description of factors sensitive to fracture and constraint index parameters"
敏感因子 | 公式 | 优势 |
电阻率降低因子RT_GR_FF | 各类缝 | |
时差增大因子AC_FF | 低角缝、裂缝破碎带 | |
电阻率幅度差因子RDS_FF | 斜交缝、高角缝 | |
自然电位因子SP_FF | 层间缝、低角缝、破碎带 | |
电阻率维度(约束指标) RTfct | 裂缝与孔隙储层区分 | |
声波维度(约束指标) ACfct | 裂缝与孔隙储层区分 |
Table 3
Statistics on coincidence rate of fracture identification in the Upper Triassic Xu 2 Member in Xinchang gas field, Western Sichuan Depression"
地层 | 井号 | 井类型 | 总取样数/个 | 非裂缝样品符合数/个 | 裂缝样品符合数/个 | 符合率/% |
须二上亚段 | X5 | 建模井 | 1 239 | 1 023 | 143 | 94.1 |
L150 | 982 | 875 | 76 | 96.8 | ||
X501 | 2 056 | 1 853 | 96 | 94.8 | ||
X601 | 盲井 | 1 702 | 1 190 | 370 | 91.8 | |
X11 | 988 | 898 | 43 | 95.2 | ||
须二中亚段 | X3 | 建模井 | 1 694 | 1 357 | 122 | 87.3 |
X5 | 1 158 | 881 | 164 | 90.2 | ||
X11 | 盲井 | 1 873 | 1 743 | 30 | 94.7 | |
X501 | 1 063 | 783 | 168 | 89.5 |
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