Reservoir Evaluation and Development ›› 2019, Vol. 9 ›› Issue (5): 78-83.
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JIANG Tingxue1,2,SU Yuan1,2,BIAN Xiaobing1,2,MEI Zongqing3
Received:
2019-08-03
Online:
2019-10-26
Published:
2019-10-26
CLC Number:
JIANG Tingxue,SU Yuan,BIAN Xiaobing,MEI Zongqing. Network fracturing technology with low cost and high density for normal pressure shale gas[J].Reservoir Evaluation and Development, 2019, 9(5): 78-83.
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Table 1
Influence of slip water with different viscosity on the support seam width of main fracture and secondary fracture"
黏度/(mPa·s) | 排量/ (m3·min-1) | 主缝最大缝宽/mm | 主缝平均缝宽/mm | 次级缝最大缝宽/mm | 次级缝平均缝宽/mm |
---|---|---|---|---|---|
3 | 10 | 4.20 | 2.21 | 0.57 | 0.28 |
3 | 12 | 4.60 | 2.42 | 0.66 | 0.32 |
3 | 14 | 4.64 | 2.44 | 0.68 | 0.33 |
3 | 16 | 4.52 | 2.38 | 0.74 | 0.36 |
3 | 18 | 4.50 | 2.37 | 0.78 | 0.38 |
10 | 10 | 4.31 | 2.27 | 0.78 | 0.38 |
10 | 12 | 4.37 | 2.30 | 0.80 | 0.39 |
10 | 14 | 4.39 | 2.31 | 0.82 | 0.40 |
10 | 16 | 4.37 | 2.30 | 0.84 | 0.41 |
10 | 18 | 4.28 | 2.25 | 0.86 | 0.42 |
Table 2
Fracture support at all levels under the condition of optimizing particle size combination and sand addition"
簇 | 主缝 | 分支缝 | |||||||
---|---|---|---|---|---|---|---|---|---|
缝长/m | 最大缝宽/mm | 平均缝宽/mm | 裂缝体积/m3 | 缝长/m | 最大缝宽/mm | 平均缝宽/mm | 裂缝体积/m3 | ||
第1簇 | 520 | 4.1 | 2.3 | 45 | 2 222 | 0.7 | 0.4 | 21 | |
第2簇 | 480 | 4.2 | 2.3 | 48 | 1 797 | 0.8 | 0.5 | 20 | |
第3簇 | 520 | 4.1 | 2.2 | 44 | 2 190 | 0.7 | 0.4 | 20 | |
合计 | 137 | 61 |
Table 3
Basic properties of slip water system with low concentration"
体系配方 | 表观黏度/(mPa·s) | 降阻率/% | 表面张力/(mN·m-1) | 防膨率/% |
---|---|---|---|---|
0.01 %降阻剂+0.1 %助排剂+0.3 %防膨剂 | 2.3 | 70.0 | 22.8 | 75.0 |
0.03 %降阻剂+0.1 %助排剂+0.3 %防膨剂 | 6.6 | 69.3 | 22.6 | 78.0 |
0.07 %降阻剂+0.1 %助排剂+0.3 %防膨剂 | 11.5 | 67.2 | 24.3 | 79.0 |
0.10 %降阻剂+0.1 %助排剂+0.3 %防膨剂 | 14.5 | 66.5 | 25.3 | 78.0 |
Table 5
Project investment cost comparison of well-D and well-A"
井名 | 井深/ m | 水平段长/ m | 总砂量/ m3 | 总液量/ m3 | 压裂段数/ 段 | 压裂主车/ 台 | 6000电动泵/ 台 | 压裂总费用/万元 | 平均单段费用/ 万元 |
---|---|---|---|---|---|---|---|---|---|
D(17段) | 4 378 | 1 317 | 2 008.2 | 34 139.0 | 17 | 18 | 0 | 3 216.00 | 189.18 |
A(20段) | 4 573 | 1 800 | 2 576.0 | 45 719.3 | 20 | 6 | 8 | 2 551.00 | 127.55 |
A与D差值 | 195 | 483 | 567.8 | 11 580.3 | 3 | -12 | 8 | -665.00 | -61.63 |
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