Reservoir Evaluation and Development ›› 2021, Vol. 11 ›› Issue (2): 223-229.doi: 10.13809/j.cnki.cn32-1825/te.2021.02.012
• Shale Gas Development • Previous Articles Next Articles
Received:
2020-10-27
Online:
2021-04-26
Published:
2021-04-30
CLC Number:
QIAO Zhiguo,YE Cuilian. Cause analysis of casing deformation in fracturing of horizontal wells in Weirong deep shale gas field[J].Reservoir Evaluation and Development, 2021, 11(2): 223-229.
Table 3
Statistics of pumping stuck"
井号 | 施工段 | 遇阻情况 |
---|---|---|
WY1-1HF | 第7段 | 109.5 mm桥塞+射孔枪遇阻,有对称卡痕 |
第11~13段 | 99.95 mm桥塞+射孔枪遇阻,洗井后,再次泵送遇阻,检查桥塞启动有明显划痕 | |
第14段 | 遇阻后连油下95 mm铅印,单侧压痕明显,后连油射孔压裂 | |
WY3-1HF | 第3段 | 103.2 mm桥塞+射孔枪遇阻,无明显压痕 |
第13段 | 95 mm全可溶桥塞+射孔枪遇阻,有对称划痕 | |
第19段 | 泵送95 mm全可溶桥塞+射孔枪遇阻,无明显划痕 | |
WY9-1HF | 第16段 | 103.2 mm桥塞+射孔枪遇阻,有对称刮痕 |
第18~19段 | 103.2 mm桥塞+射孔枪遇阻,单侧明显划痕 | |
WY5-1HF | 第7~8段 | 100 mm桥塞+射孔枪遇阻,有对称划痕 |
第9~12段 | 100 mm桥塞遇阻,单侧明显划痕;连油下95 mm通井规单侧明显划痕 |
Table 5
Casing collapse properties data under multiple influence factors"
套管规格 (mm) | 壁厚 (mm) | 抗外挤强度(MPa) | 地层破裂 压力 (MPa) | 套管内 压力 (MPa) | 抗外挤 安全系数 | ||||
---|---|---|---|---|---|---|---|---|---|
API 理论值 | 偏心40 %+ 水泥环缺失20° | 温度降影响 为90 ℃时 | 井身全角变化率 为10°/30 m时 | 瞬时停泵27 s | |||||
?139.7 | 12.70 | 156.7 | 150.3 | 124.3 | 120.7 | 110.7 | 120 | 100 | 6.5 |
?139.7 | 10.54 | 120.2 | 115.3 | 90.3 | 86.7 | 76.6 | 120 | 100 | 4.5 |
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