鄂尔多斯盆地西缘冲断带页岩气井综合治漏技术

孙欢; 朱明明; 杨勇平; 王伟良; 王凯; 赵向阳

doi:10.11911/syztjs.2024117

鄂尔多斯盆地西缘冲断带页岩气井综合治漏技术

1.
中国石油集团川庆钻探工程有限公司长庆钻井总公司，陕西西安 710018
2.
中国石油集团川庆钻探工程有限公司钻采工程技术研究院，陕西西安 710018

基金项目: 中国石油集团川庆钻探工程有限公司项目“长庆非常规油气井多层系断层靶向治漏技术研究”（编号：CQ2022B–16–1–3）资助。

详细信息

作者简介:
孙欢（1990—），男，陕西咸阳人，2012年毕业于西安石油大学应用化学专业，高级工程师，主要从事水基钻井液防漏堵漏方面的技术研究与现场应用工作。E-mail：1025351195@qq.com

中图分类号: TE28⁺3
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出版历程
- 收稿日期: 2023-02-18
- 修回日期: 2024-11-11
- 网络出版日期: 2024-11-21
- 刊出日期: 2025-02-27

Comprehensive Leakage Control Technology for Shale Gas Wells in Western Margin Thrust Zone of Ordos Basin

1.
Changqing Drilling Company, CNPC Chuanqing Drilling Engineering Company Limited, Xi’an, Shaanxi, 710018, China
2.
Drilling & Production Engineering Technology Research Institute, CNPC Chuanqing Drilling Engineering Company Limited, Xi’an, Shaanxi, 710018, China

摘要

摘要:
鄂尔多斯盆地西缘逆冲带区域深层页岩地层交界面存在天然裂缝，长裸眼井段多套承压薄弱层同存，承压能力弱，钻井过程中漏失频发，严重制约着钻井提速增效。研究了随钻承压护壁技术，以提高裸眼井段承压薄弱层的承压能力；采用了长裸眼漏层精准定位技术，以实现漏层的精准定位；研发了酸溶性高滤失堵漏工作液，用其封堵裂缝性恶性漏失，大幅提高钻井时效。将述技术集成形成了鄂尔多斯盆地西缘冲断带页岩气井综合治漏技术。该技术在鄂尔多斯盆地西缘冲断带14口井页岩气井进行了现场应用，专项堵漏时间缩短55.25%，钻井周期缩短15.5 d。鄂尔多斯盆地西缘冲断带综合治漏技术为该盆地页岩气井的安全高效开发提供了技术支持。
- 页岩气 /
- 护壁剂 /
- 漏层定位 /
- 高滤失堵漏工作液 /
- 综合治漏 /
- 鄂尔多斯盆地
Abstract:
The western margin thrust zone of the Ordos Basin are characterized by the presence of natural fractures at the interface of deep shale formations, with multiple sets of weak pressure-bearing layers coexisting in the long open hole wellbore section, resulting in weak pressure-bearing capacity and frequent lost circulation during drilling, which seriously restricts drilling speed and efficiency. To this end, the pressure-bearing wall protection while drilling technology has been studied to enhance the pressure-bearing capacity of weak pressure-bearing layers in the open hole sections. Precision positioning technology for leak layers in long open hole sections has been employed to achieve accurate positioning of the leak layers. Acid-soluble high-filtration plugging fluid has been developed, which was highly effective in plugging severe loss caused by fractures and thus significantly improving drilling efficiency. These technologies have been integrated into comprehensive leakage control technologie for shale gas wells in western margin thrust zone of Ordos Basin. These technologies have been applied in 14 shale gas wells in the thrust zone at the western margin of Ordos Basin, reducing the special plugging time by 55.25% and shortening the drilling period by 15.5 days. The comprehensive leakage control technologies for the thrust zone at the western margin of Ordos Basin provide technical support for the safe and efficient development of shale gas wells in Ordos Basin.
- shale gas /
- wall protector /
- leakage layer positioning /
- high filtration plugging working fluid /
- comprehensive treatment of leakage /
- Ordos Basin

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图 1 测漏工具结构示意

Figure 1. Leakage detection tool structure

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表 1 随钻承压护壁剂加量对基液性能的影响

Table 1 Influence of pressure-bearing wall protection agent while drilling on performance of water-based drilling fluid

护壁剂加量，%	热滚情况	密度/ （kg·L⁻¹）	塑性黏度/ （mPa·s）	动切力/ Pa	滤失量/ mL
0	热滚前	1.14	32.0	14.0
0	热滚后	1.14	29.0	13.0	4.0
1.0	热滚前	1.15	33.0	14.5
1.0	热滚后	1.15	29.0	13.0	3.9
3.0	热滚前	1.15	33.0	15.0
3.0	热滚后	1.15	30.0	13.0	3.8
5.0	热滚前	1.15	33.0	15.0
5.0	热滚后	1.15	31.0	13.5	3.5
7.0	热滚前	1.16	37.0	17.0
7.0	热滚后	1.16	34.5	16.0	3.5
9.0	热滚前	1.17	42.0	18.0
9.0	热滚后	1.17	38.0	16.5	3.4
注：热滚是在90 ℃下滚动16 h；基液是在60 ℃下测得。

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表 2 不同加量高滤失堵漏材料工作液性能评价结果

Table 2 Performance evaluation of working fluids with different amounts of high filtration plugging materials

堵漏材料加量，%	密度/ （kg·L⁻¹）	滤失时间/ s	滤失量/ mL	滤饼厚度/ mm	滤饼抗压强度/MPa
10	1.07	15	210	3	>5
15	1.11	25	210	6	>7
20	1.15	31	210	9	>8
25	1.20	39	200	12	>10
30	1.25	45	190	14	>10
注：堵漏工作液配方为清水+10%～30%酸溶性高滤失堵漏材料。

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表 3 滤饼酸溶性试验结果

Table 3 Acid solubility experiment results of filter cake

编号	滤饼质量/g	残渣质量/g	酸溶率，%
1	2.03	0.30	85.22
2	2.01	0.28	86.07
3	2.03	0.29	85.71
4	2.05	0.30	85.37
5	2.02	0.28	86.14
平均	2.03	0.29	85.70

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表 4 HX-1井与邻井综合治漏效果对比

Table 4 Comparison of comprehensive leakage control effect of Well HX−1 and an adjacent well

井号	漏失层位	漏失次数	堵漏次数	堵漏时间/h
HX−1	和尚沟组	1	1	24
ZX−1 （邻井）	和尚沟组	2	4	86
	刘家沟组	2	3	53
	山西组	1	2	36
	拉什仲组	1	1	25

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