应用化学 ›› 2024, Vol. 41 ›› Issue (9): 1271-1283.DOI: 10.19894/j.issn.1000-0518.240007
卢星辰1,2, 刘健1,2, 杜娟3(), 高小荣1,2, 许勇2, 任小庆2
收稿日期:
2024-01-07
接受日期:
2024-07-16
出版日期:
2024-09-01
发布日期:
2024-10-09
通讯作者:
杜娟
基金资助:
Xing-Chen LU1,2, Jian LIU1,2, Juan DU3(), Xiao-Rong GAO1,2, Yong XU2, Xiao-Qing REN2
Received:
2024-01-07
Accepted:
2024-07-16
Published:
2024-09-01
Online:
2024-10-09
Contact:
Juan DU
About author:
dujuanswpu@163.comSupported by:
摘要:
非均质性是油气储层的基本特征,酸化施工采用暂堵剂封堵高渗、促使酸液作用于低渗层,是提高非均质储层酸化改造效果的关键措施。 为了解决现有高分子暂堵剂成胶时间不可控、残渣伤害严重等问题,采用生物材料海藻酸钠(SA)和黄原胶(XG)通过半互穿方式形成具有高强度可降解的新型暂堵剂SAXG。 以变形量和成胶时间为目标优化了体系的最优质量百分比0.7% SA+0.3% XG,采用流变仪测试了凝胶的流变性以及延迟成胶效果,以残渣含量描述体系的可降解性,通过扫描电子显微镜(SEM)明确了SAXG半互穿网络与SA凝胶的区别,最后采用岩心流动实验验证了体系的转向酸化效果。 研究结果表明,SAXG成胶时间范围为14~456 min; SAXG在盐水和酸液中可完全降解; 暂堵酸化后岩心渗透率比常规酸化后提高了2.85倍; 降解后岩心渗透率恢复率达98.6%。 SAXG可有效促使酸液转向,从而提高酸化改造效果。
中图分类号:
卢星辰, 刘健, 杜娟, 高小荣, 许勇, 任小庆. 一种可降解半互穿网络暂堵剂的制备及性能[J]. 应用化学, 2024, 41(9): 1271-1283.
Xing-Chen LU, Jian LIU, Juan DU, Xiao-Rong GAO, Yong XU, Xiao-Qing REN. Preparation and Performance of the Degradable Semi-Interpenetrating Network Temporary Plugging System[J]. Chinese Journal of Applied Chemistry, 2024, 41(9): 1271-1283.
No. | w(SA)/% | w(XG)/% | ?h/mm | Gelation time/min |
---|---|---|---|---|
1 | 0.5 | 0.1 | 10 | 38 |
2 | 0.5 | 0.2 | 6 | 29 |
3 | 0.5 | 0.3 | 4.5 | 21 |
4 | 0.5 | 0.4 | 3.5 | 8 |
5 | 0.6 | 0.1 | 8 | 33 |
6 | 0.6 | 0.2 | 5.5 | 26 |
7 | 0.6 | 0.3 | 4 | 20 |
8 | 0.6 | 0.4 | 2.5 | 6 |
9 | 0.7 | 0.1 | 6 | 31 |
10 | 0.7 | 0.2 | 3.5 | 21 |
11 | 0.7 | 0.3 | 2 | 13 |
12 | 0.7 | 0.4 | 2 | 5 |
13 | 0.8 | 0.1 | 5 | 21 |
14 | 0.8 | 0.2 | 2.5 | 13 |
15 | 0.8 | 0.3 | 2 | 6 |
16 | 0.8 | 0.4 | 2 | 3 |
表1 暂堵剂的配方优化
Table 1 Optimization of formula for divergent
No. | w(SA)/% | w(XG)/% | ?h/mm | Gelation time/min |
---|---|---|---|---|
1 | 0.5 | 0.1 | 10 | 38 |
2 | 0.5 | 0.2 | 6 | 29 |
3 | 0.5 | 0.3 | 4.5 | 21 |
4 | 0.5 | 0.4 | 3.5 | 8 |
5 | 0.6 | 0.1 | 8 | 33 |
6 | 0.6 | 0.2 | 5.5 | 26 |
7 | 0.6 | 0.3 | 4 | 20 |
8 | 0.6 | 0.4 | 2.5 | 6 |
9 | 0.7 | 0.1 | 6 | 31 |
10 | 0.7 | 0.2 | 3.5 | 21 |
11 | 0.7 | 0.3 | 2 | 13 |
12 | 0.7 | 0.4 | 2 | 5 |
13 | 0.8 | 0.1 | 5 | 21 |
14 | 0.8 | 0.2 | 2.5 | 13 |
15 | 0.8 | 0.3 | 2 | 6 |
16 | 0.8 | 0.4 | 2 | 3 |
No. | w(SA)/% | w(XG)/% | w(SG)/% | Degradation time/h |
---|---|---|---|---|
1 | 0.7 | 0.3 | 0.0 | 132 |
2 | 0.7 | 0.3 | 0.1 | 124 |
3 | 0.7 | 0.3 | 0.2 | 132 |
4 | 0.7 | 0.3 | 0.3 | 132 |
5 | 0.7 | 0.3 | 0.4 | 132 |
表2 60 ℃下SG质量分数对SAXG降解性能的影响
Table 2 Effect of SG mass fraction on the degradation time of SAXG at 60 ℃
No. | w(SA)/% | w(XG)/% | w(SG)/% | Degradation time/h |
---|---|---|---|---|
1 | 0.7 | 0.3 | 0.0 | 132 |
2 | 0.7 | 0.3 | 0.1 | 124 |
3 | 0.7 | 0.3 | 0.2 | 132 |
4 | 0.7 | 0.3 | 0.3 | 132 |
5 | 0.7 | 0.3 | 0.4 | 132 |
图13 60 ℃下HCl质量分数对SAXG凝胶降解速率的影响w(HCl)/%: a.20; b.15; c.10; d.5; e.0
Fig.13 Effect of hydrochloric acid mass fraction on the degradation rate of SAXG gel at 60 ℃
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