有机缓释微乳酸高效解堵剂的制备及性能研究

何立成; 蓝强; 黄维安; 王雪晨; 尚术芳; 李秀灵

doi:10.12358/j.issn.1001-5620.2022.02.021

有机缓释微乳酸高效解堵剂的制备及性能研究

doi: 10.12358/j.issn.1001-5620.2022.02.021

1.
中石化胜利石油工程有限公司, 山东东营 257001
2.
中石化胜利石油工程有限公司钻井液技术服务中心, 山东东营 257017
3.
中国石油大学（华东）石油工程学院, 山东青岛 266580

基金项目: 中石化工程公司课题“有机缓释酸解卡剂的研制与应用”（SG19-78K）和中石化课题“复合盐水微乳液研究与应用”（JP20004）部分研究内容

详细信息

作者简介:
何立成，高级工程师，1972年生，毕业于石油大学（华东）钻井专业，现在从事钻井工程及科研管理工作

通讯作者:
蓝强，高级工程师，E-mail：mlanqiang@163.com

中图分类号: TE257.6
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- 被引次数: 0
出版历程
- 收稿日期: 2021-10-29
- 修回日期: 2021-12-12
- 录用日期: 2021-10-29
- 刊出日期: 2022-06-23

Preparation and Properties of Slow-release Organic Acid Micro-emulsion with High Efficient Plugging Removal

1.
Sinopec Shengli Petroleum Engineering Co., Dongying, Shandong 257001
2.
Drilling fluid technical service centre of Sinopec Shengli Petroleum Engineering Co., Dongying, Shandong 257017
3.
School of petroleum engineering, China University of Petroleum (East China), Qingdao, Shandong 266580

摘要

摘要: 针对油田常用酸化方法存在酸液剖面不均匀和二次伤害的问题，优选有机酸和无机酸形成复合酸，优选表面活性剂和助表面活性剂，制备出有机缓释酸微乳液，其最优配方为：AQAS∶AEO=1∶1, 正丁醇∶正辛醇 =1∶1，水相∶油相=3∶7，助表面活性剂︰表面活性剂=1∶2，乙酸∶氢氟酸=4∶1。该体系的泥饼清除率超过85%，在低渗岩心中解堵效果显著，其渗透率恢复值超过100%。
- 酸化 /
- 有机缓释 /
- 微乳酸 /
- 泥饼清除 /
- 解堵
Abstract: In view of the problem of uneven acidizing profile and second damage during the acidification in stimulation, organic acids and inorganic acids were selected to form complex acids, and surfactant and co-surfactant also were optimized to prepare organic slow-release acid micro-emulsion. The formula is: AQAS∶AEO=1∶1, n-butanol: n-octanol =1∶1, water phase: oil phase = 3∶7, co-surfactant∶surfactant =1∶2, acetic acid∶hydrofluoric acid = 4∶1. The mud cake removal rate of the system is more than 85%, the plugging removal effect in the low-permeability core is remarkable, and the permeability recovery value is more than 100%.
- Acidification /
- Organic slow-release /
- Micro-emulsified acid /
- Mud cake removal /
- De-plugging

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图 1 不同酸液条件下AQAS+AEO表面活性剂复配的微乳液拟三元相图

注：C、O、S分别表示酸相、油相、表面活性剂，其值均为每相占三相总和的比例

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图 2 微乳酸M-1的外观（左）及染色法鉴定微乳酸结构（右）

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图 3 不同酸形成的微乳酸（左）及　　染色法鉴定微乳酸结构（右）

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图 4 M-1体系在不同含水量下的电导率值

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图 5 酸液对岩屑的溶蚀实验

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图 6 高温高压动态泥饼的清除效果

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图 7 现场钻井液污染前（左）、污染后（中）和有机缓释微乳酸解堵后（右）的岩心照片

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表 1 不同配方酸液对岩屑的溶蚀率

岩屑编号	有机酸液配方	溶蚀率/%
岩屑编号	有机酸液配方	1 h	2 h	3 h	4 h
1^#	12%CH₃COOH+2%HF	3.5	6.1	9.6	11.8
	12%CH₃COOH+4%HF	5.2	8.6	12.5	14.6
	16%CH₃COOH+2%HF	7.6	10.3	14.5	17.7
	16%CH₃COOH + 4%HF	10.5	14.9	18.4	22.9
	12%CH₃COOH + 2%HCl	2.8	5.3	7.5	10.1
	12%CH₃COOH + 4%HCl	3.9	8.2	10.5	12.3
	16%CH₃COOH + 2%HCl	7.0	12.4	13.7	16.2
	16%CH₃COOH + 4%HCl	9.5	15.6	17.2	20.1
2^#	12%CH₃COOH+2%HF	33.3	37.7	42.5	44.6
	12%CH₃COOH+4%HF	36.8	39.5	44.1	49.4
	16%CH₃COOH+2%HF	47.9	52.2	54.7	58.1
	16%CH₃COOH + 4%HF	56.2	59.3	61.5	66.9
	12%CH₃COOH + 2%HCl	22.4	29.9	38.6	43.7
	12%CH₃COOH + 4%HCl	24.7	32.9	41.6	49.1
	16%CH₃COOH + 2%HCl	25.1	35.0	45.3	56.6
	16%CH₃COOH + 4%HCl	28.8	39.6	48.9	64.6
注：1^#岩屑矿物：38%石英、13%钾长石、22%方解石、 12%白云石、2%黄铁矿、5%重晶石、8%黏土；2^#岩屑矿物：8%石英、3%钾长石、81%方解石、5%白云石、1%黄铁矿、2%黏土

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表 2 工作液对渗透率的影响实验结果

工作液	实验条件	渗透率/ mD	渗透率恢复值/ %
现场钻井液	污染前	0.1732
现场钻井液	污染后	0.0629	36.32
微乳酸M-1	解堵后	0.2588	149.42

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