一种抗钙盐性能优异的吸附型酸化缓速剂

蒋琪; 王鹏祥; 全红平

doi:10.12358/j.issn.1001-5620.2024.06.016

一种抗钙盐性能优异的吸附型酸化缓速剂

doi: 10.12358/j.issn.1001-5620.2024.06.016

蒋琪^{1, 2,},
王鹏祥^{1, 2},
全红平^3, ,

1.
中国石油川庆钻探工程有限公司井下作业公司, 成都 610052
2.
四川川庆井下科技有限公司，四川广汉 618300
3.
西南石油大学化学化工学院, 成都 610500

基金项目: 国家自然科学基金项目“低粘吸附型酸化缓速剂分子设计及缓速机理研究”（51604229）；四川省科技计划项目“聚合物型非交联自转向酸化转向剂分子设计及转向机理研究”（2019YJ0315）；油气田应用化学四川省重点实验室开放基金项目“聚合物型非交联酸化自转向剂的研究”（YQKF202001）。

详细信息

作者简介:
蒋琪，助理工程师，1991年生，现在从事油气田开发研究工作。电话15727023187；E-mail：1224632102@qq.com

通讯作者:
全红平，教授，1982年生，2010年获西南石油大学工学博士学位，现在从事油田化学品及工作液的研发与应用。E-mail：59183228@qq.com。

中图分类号: TE357.12
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- 被引次数: 0
出版历程
- 收稿日期: 2024-05-29
- 修回日期: 2024-06-04
- 录用日期: 2024-06-04
- 刊出日期: 2024-11-30

An Excellent Calcium- and Salt-Resistant Adsorptive Retarder for Acid Job

JIANG Qi^{1, 2
,},
WANG Pengxiang^{1, 2},
QUAN Hongping^{3
, ,}

1.
Downhole Service Company, CNPC Chuanqing Drilling Engineering Co., LTD., Chengdu, Sichuan 610052
2.
Sichuan Chuanqing Downhole Technology Co., LTD., Guanghan,Sichuan 618300
3.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500

摘要

摘要: 为增强储层酸化改造效果，利用磺酸盐单体(MS)、丙烯酰胺（AM）、烯丙基聚氧乙烯醚（APEG-2400）、十八烷基二甲基烯丙基氯化铵（DMAAC-18）制备一种吸附型酸化缓速剂。通过单因素实验筛选出最佳合成条件：单体配比n(AM)∶n(MS)∶n(DMAAC-18)∶n(APEG-2400) = 90∶5∶1∶4，单体浓度为35%，引发剂加量为1.0%，反应温度为50 ℃，反应时间为5 h。使用傅里叶变换红外光谱仪（FT-IR）表征缓速剂的结构，结果表明与预期产物相符。在缓速剂加量为1.3%时，缓速率达到81.56%，并且表观黏度保持在3 mPa·s，具备优异的低黏性能。同时酸化缓速剂在110 ℃下的缓速率超过83%，拥有良好的抗温性能。酸化缓速剂与助排剂、铁离子稳定剂和缓蚀剂之间的配伍性好，不会出现沉淀絮凝，缓速酸体系缓速效果较好。抗氯化钙能力可达70000 mg/L，在350 ℃的高温下，质量损失只有17.59%，热稳定性良好。扫描电子显微镜（SEM）测试结果表明，缓速剂在岩石表面成功吸附并形成了一层致密的吸附膜。
- 碳酸盐岩储层 /
- 酸化 /
- 缓速剂 /
- 吸附
Abstract: An adsorptive retarder for acid job has been developed aimed at enhancing the stimulation effect of acid job. The retarder is synthesized using monomers such as monomeric sulfonate (MS), acrylamide (AM), allyl polyoxyethylene glycol (APEG-2400) and octadecyl dimethyl allyl ammonium chloride (DMAAC-18) in a concentration ratio of n(AM)∶n(MS)∶n(DMAAC-18)∶n(APEG-2400) = 90∶5∶1∶4. The concentration of the monomers is 35%, the concentration of the initiator is 1.0%, the reaction temperature is 50 ℃ and the reaction time is 5 h. These reaction conditions were determined through single-factor experiment. The characterization of the molecular structure of the retarder with FT-IR shows that the reaction product is what was expected. The retarding efficiency of the retarder at a concentration of 1.3% is 81.56%, and the system has its apparent viscosity stabilized at 3 mPa∙s, an excellent low viscosity property. At 110 ℃, the retarding efficiency of the retarder exceeds 83%, indicating that the retarder has good high temperature performance. This retarder has good compatibility with cleanup additives, iron ion stabilizers and corrosion inhibitors; no flocculation and precipitation exist when the retarder is used with other additives. This retarder is able to resist the contamination by 70,000 mg/L CaCl₂. It also has good thermal stability; at 350 ℃, the rate of mass loss of the retarder is only 17.59%. Observation of the retarder under SEM shows that the retarder is adsorbed on the surfaces of the rocks and forms a dense layer of adsorption membrane.
- Carbonate reservoir /
- Acidize /
- Retarder /
- Adsorb

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图 1 酸化缓速剂的红外光谱图

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图 2 酸化缓速剂热重图

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图 3 缓速剂加量对缓速率的影响

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图 4 氯化钙对缓速率的影响

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图 5 酸化缓速剂与添加剂之间的配伍性

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图 6 钙盐对酸岩反应的影响

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图 7 与不同酸液反应后的岩石表面的扫描电镜图

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表 1 单体配比优化

n(AM)∶n (MS)∶ n (DMAAC-18)∶ n (APEG-2400)	溶蚀率/ %	n (AM)∶n (MS)∶ n (DMAAC-18)∶ n (APEG-2400)	溶蚀率/ %
10∶70∶1∶19	54.3	75∶5∶1∶19	48.5
20∶60∶1∶19	56.6	80∶10∶1∶9	44.1
30∶50∶1∶19	51.8	85∶10∶1∶4	43.7
40∶40∶1∶19	51.9	85∶5∶1∶9	30.5
50∶30∶1∶19	52.5	85∶3∶1∶11	36.9
60∶20∶1∶19	50.4	90∶5∶1∶4	28.3
70∶10∶1∶19	46.0	90∶7∶1∶2	32.2

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表 2 单因素优化

单体浓度/%	引发剂/%	T/℃	t/h	溶蚀率/%
20	0.6	50	5	56.1
25	0.6	50	5	47.6
30	0.6	50	5	45.2
35	0.6	50	5	37.3
40	0.6	50	5	42.2
35	0.4	50	5	52.6
35	0.6	50	5	39.5
35	0.8	50	5	36.1
35	1.0	50	5	31.8
35	1.2	50	5	33.2
35	1.0	35	5	55.0
35	1.0	40	5	52.4
35	1.0	45	5	42.6
35	1.0	50	5	30.3
35	1.0	55	5	32.6
35	1.0	50	2	52.3
35	1.0	50	3	47.2
35	1.0	50	4	33.0
35	1.0	50	5	27.7
35	1.0	50	6	32.5

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表 3 不同浓度缓速酸溶液的表观黏度

序号	缓速酸/%	AV/mPa·s
1	0.3	1.5
2	0.5	1.5
3	0.7	1.5
4	0.9	1.5
5	1.1	3.0
6	1.3	3.0
7	1.5	3.0

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表 4 不同温度下酸化缓速剂的缓速率

序号	T/℃	缓速率/%
1	50	81.56
2	70	82.87
3	90	82.57
4	100	83.02
5	110	83.21

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表 5 不同温度下缓速酸体系的缓速率

序号	T/℃	浓度/%	缓速率/%
1	100	1.3	77.64
2	110	1.3	73.99

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