Reservoir Evaluation and Development ›› 2019, Vol. 9 ›› Issue (5): 20-31.
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LIANG Xing1,ZHANG Chao1,ZHANG Pengwei2,ZHANG Lei1,WANG Gaocheng1,PAN Yuanwei2,ZHAO Chunduan2,ZHANG Jiehui1,WANG Weixu1,QIU Kaibin2
Received:
2019-07-23
Online:
2019-10-26
Published:
2019-10-26
CLC Number:
LIANG Xing,ZHANG Chao,ZHANG Pengwei,ZHANG Lei,WANG Gaocheng,PAN Yuanwei,ZHAO Chunduan,ZHANG Jiehui,WANG Weixu,QIU Kaibin. Research and application of geomechanics of shale gas in deep mountain of Yichang, Hubei[J].Reservoir Evaluation and Development, 2019, 9(5): 20-31.
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Table 1
Parameters statistics of deep shale gas reservoir at home and abroad"
深层页岩气区块 | 平均埋深/ m | 平均厚度/m | TOC/ % | 杨氏模量/ GPa | 泊松比 | 脆性指数/ % | 水平两向应 力差/MPa | 闭合应力梯度/ (kPa·m-1) |
---|---|---|---|---|---|---|---|---|
Eagle Ford | 3 600 | 121 | 1.5~5.5 | 20~35 | 0.12~0.21 | 35~70 | 21.0 | |
Haynesville | 3 658 | 76 | 3~5 | 13.78 | 0.27 | 35~55 | 4 | 22.6 |
Cana Woodford | 4 115 | 61 | 6~12 | 34.45 | 0.18 | 55~75 | 5.7 | 21.5 |
宜昌远安 | 3 500~4 200 | 20~38 | 3.3~6 | 37~41 | 0.26 | 50~75 | 25~35 | 18.5~20.5 |
Table 3
Leakage analysis and targeted countermeasures of research area in Yichang"
类型 | 漏失压力梯度—ECD/ (g·cm-3) | 杨氏模量/ GPa | 平均漏速/(m3·h-1) | 等效裂缝开度/mm | 建议堵漏材料 |
---|---|---|---|---|---|
Ⅰ—缓慢型漏失 | >0.2 | >41 | <5 | <0.6 | 颗粒型堵漏剂。考虑颗粒级配:混合的颗粒粒径中有一定比例大于裂缝开度,提高封堵性。D90>裂缝开度效果较好(D90表示小于某颗粒粒径的质量占的百分数) |
Ⅱ—快速型漏失 | 0.2~0.02 | 29~41 | 5~40 | 0.6~2 | 纤维堵漏材料。表面活性剂。添加固体颗粒。纤维浓度:不超过11.4 kg/m3 |
Ⅲ—超快速型漏失 | <0.02 | <29 | >40 | >2 | 触变式水泥。控制井具振动、井下温度、压力 |
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