水不分散水泥浆体系适应性研究与现场应用

王建瑶; 杨昆鹏; 梅明佳

doi:10.12358/j.issn.1001-5620.2021.04.016

水不分散水泥浆体系适应性研究与现场应用

doi: 10.12358/j.issn.1001-5620.2021.04.016

王建瑶^{1, 2, 3,},
杨昆鹏^{1, 2, 3},
梅明佳⁴

1.
中国石油海洋工程有限公司钻井工程研究院，天津 300451
2.
中国石油钻井工程重点实验室固井技术研究室，天津 300451
3.
油气钻井技术国家工程实验室固井技术研究室，天津 300451
4.
中国石油川庆钻探工程有限公司长庆固井公司，西安 710000

基金项目: 中国石油集团油田技术服务有限公司科学研究与技术开发项目“井筒业务新技术新方法研究与推广应用”课题“高含水压力扰动地层固井技术及防水窜新材料研究”（2020T-003-003）

详细信息

作者简介:
王建瑶，工程师，1984年生，2013年毕业于湖南大学分析化学专业，现在从事固井外加剂研究及现场技术服务工作。电话（022）66310216；E-mail：wjy.cpoe@cnpc.com.cn

中图分类号: TE256.6
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出版历程
- 收稿日期: 2021-03-20
- 刊出日期: 2021-07-31

The Adaptability and Application of a Water Non-Dispersible Cement Slurry

WANG Jianyao^{1, 2, 3
,},
YANG Kunpeng^{1, 2, 3},
MEI Mingjia⁴

1.
CNPC Tianjin Boxing Engineering Science & Technology Co., Ltd., Tianjin 300451
2.
CNPC Key Laboratory of Drilling Engineering; Laboratory of Cementing Technology, Tianjin 300451
3.
National Engineering Laboratory of Petroleum Drilling Technology, Tianjin 300451
4.
CCDC Changqing Well Cementing Company, Xi’an, Shaanxi 710000

摘要

摘要: 针对长庆油田注水区块、高含水地层固井期间和固井后水侵、水窜问题突出的情况，结合现场实际，对抗分散絮凝剂BCY-100L的现场适应性进行研究，优选了抗分散辅剂A。针对现场不同体系配套不同外加剂，形成水不分散固井液体系，该体系在水侵发生时能够保持水泥体系自身胶凝结构完整性，具有良好的遇水不分散和抗冲刷能力，施工性能良好，可阻止地层水的侵入，保障水泥浆与套管、地层的胶结质量。在长庆油田含水地层成功应用2井次，二界面固井质量合格率为100%，优质率达95%以上，其中二界面水层固井质量由28%提高至95%，水层封固效果明显提高，在注水区块和高含水地层固井具有良好的应用前景。
- 水不分散 /
- 水泥浆 /
- 固井 /
- 抗水侵
Abstract: There has long been a water invasion and channeling problem in the water injection blocks and high water cut formations in Changqing oilfield which always happened during and/or after well cementing. To deal with this problem, the field adaptability of the anti-dispersing flocculant BCY-100L was studied taking into account the conditions of field operation. A secondary anti-dispersing agent A was selected through laboratory experiment. Different water non-dispersible cement slurries can be formulated by adding different cement additives to suit different requirements of well cementing. This water non-dispersible cement slurry can maintain its gel structure integrity when water invasion occurs, having outstanding non-dispersing performance and erosion resistance when in contact with water. It is able to resist the invasion of formation water and protect the good bonding at both sides of the cement sheath. This cement slurry has been used twice in wells penetrating water bearing zones, and the pass rate of the quality of the cement sheath with the casing and the borehole wall is 100%, and the high-quality rate of the bonding was 95%. The job quality of the cementing in the water bearing section was increased from 28% to 95%. Field application indicates that this cement slurry has good prospects in cementing wells in water injection area and wells penetrating water bearing formations.
- Water non-dispersible /
- Cement slurry /
- Well cementing /
- Water invasion resistant

HTML全文

图 1 用常规粉煤灰水泥浆封固水层的二界面胶结测井图

下载: 全尺寸图片幻灯片

表 1 加入不同高分子聚合物后水泥浆的抗分散性能

聚合物/%	不同温度（℃）下水泥损失量/g
	高分子聚合物A		高分子聚合物B			高分子聚合物C
	30	50	80	30	50	80	30	50	80
0	8.0	11.0	14.0	8	11	14	8	11	14
1	4.0	5.0	8.0	8	12	15	6	7	10
2	1.5	2.0	4.0	9	11	14	5	6	8
3	0.2	0.6	0.8	9	11	14	6	6	7
4	0.1	0.2	0.4	9	11	13	7	7	7
5	1.0	1.0	2.0	8	11	14	5	7	8

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表 2 直井尾浆适应性评价实验（55 ℃，ρ=1.92 g/cm³）

直井配方/g					t_下灰/ s	水泥损失率/%	p_{24 h}/ MPa	t_稠化/ min
大样灰	BCY- 100L	A	D	水	t_下灰/ s	水泥损失率/%	p_{24 h}/ MPa	t_稠化/ min
735	0	0	0	290	20	5.2	27.0	66
735	29	1	4.5	290	20	0.7	25.5	100
840	24	1	2.0	327	30	1.5	26.0	82

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表 3 水平井尾浆大样适应性评价实验（55 ℃，ρ=1.92 g/cm³）

	水平井配方/g					t_下灰/ s	水泥损失率/%	p/MPa			t_稠化/ min
配方	大样灰	BCY- 100L	A	D	水	t_下灰/ s	水泥损失率/%	8 h	24 h	48 h	t_稠化/ min
1^#	735				290	35	4.8		26		117
2^#	735	26	1	1	286	35	0.6	12.5/12.3	25	31.2/33.9	128

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表 4 油井直井粉煤灰体系小样适应性评价实验（45 ℃，ρ=1.60 g/cm³）

	粉煤灰体系配方/g						t_下灰/ s	水泥损失率/%	p/MPa		t_稠化/ min
配方	小样灰	BCY- 100L	A	D	E	水	t_下灰/ s	水泥损失率/%	24 h	48 h	t_稠化/ min
1^#	520					375	25	4.5	7.3	17.3
2^#	520	21	1.0	2.0		354	50	0.8	6.6	12.6
3^#	520	21	1.0			354	＞120	4.7	7.4	14.4
4^#	520	21	1.0	2.5		354	38	0.7	2.5	13.2
5^#	520	18	0.8		7.4	350	30	0.6	7.5	13.5	240

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表 5 水泥浆浆柱结构设计

封固段	水泥浆	ρ/ g·cm⁻³
洛河组以上	轻珠水泥浆	1.33
洛河组底至延安组	粉煤灰水泥浆	1.57
延长组	早强水泥浆	1.89

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表 6 午X井抗水侵粉煤灰水泥浆体系大样性能（45 ℃）

水泥浆	ρ/ g·cm⁻³	t_下灰/ s	水泥损失率/%	p/MPa		t_稠化/ min
水泥浆	ρ/ g·cm⁻³	t_下灰/ s	水泥损失率/%	24 h	48 h	t_稠化/ min
现场灰罐+ 小样水	1.60	20	0.6	5.5	8.4	231
现场水泥车大样灰+大样水	1.63	25	0.8	7.0	9.6	222
注：水泥浆配方为500 g大样灰+21 gBCY-100L+1 g抗分散调节剂A+8.4 gC+350 g水

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表 7 陈X井抗水侵粉煤灰水泥浆体系大样性能（45 ℃）

水泥浆	ρ/ g·cm⁻³	t_下灰/ s	水泥损失率/%	抗压强度/MPa		t_稠化/ min
水泥浆	ρ/ g·cm⁻³	t_下灰/ s	水泥损失率/%	24 h	48 h	t_稠化/ min
现场灰罐+ 小样水	1.52	20	1.2	5	8.3	211
现场水泥车大样灰+大样水	1.61	25	0.8	10	15	203
注：水泥浆配方为500 g大样灰+21 gBCY-100L+1 g抗分散调节剂A+8.4 gC+350 g水

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表 8 固井界面胶结测井结果

井号	一界面		二界面		水层二界面
井号	合格率/%	优质率/%	合格率/%	优质率/%	优质率/%
午X	100	100	100	97	95
午XX	99	96	100	66	28
陈X	100	100	100	96	93

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