一种新型的环保固体酸,用于注射井的矩阵酸化过程中的深度转移
Yangyang Fu1, Jian Zou1, Xiaoxu Tang1
1Tianjin Branch of CNOOC (China) Co. Ltd, Tianjin 300459, China.
ACS omega
|August 11, 2025
概括
一种新的深度转移酸化 (DDA) 系统使用温度敏感的颗粒暂时堵塞高透性区域,使酸能够达到更紧密的构成,以增强石油回收. 这种自我清洁系统可以改善异质水库中的刺激.
科学领域:
- 石油工程是石油工程中的一个.
- 储水库工程 储水库工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 不同质的水库对酸刺激构成挑战,原因是高透区的流量偏好.
- 传统的酸性系统往往会绕过低透度的形成,从而限制了刺激的有效性.
- 有效的转移对于深层酸透和改善碳化合物回收至关重要.
研究的目的:
- 开发一种新型温度响应的深度转移酸化 (DDA) 系统.
- 为了使酸能够有效地转向异质水库中的低透度构成.
- 为了实现高透性区域的临时堵塞,并随后自行清洁流通道.
主要方法:
- 制定一个DDA系统,结合有机酸盐,酸释放前体,缓冲剂和分散剂.
- 在位相转换由下孔温度 (60-70°C) 触发,形成不溶的有机酸颗粒.
- 实验室测试以评估可注射性,相位转换,堵塞效率和自溶特性.
- 关于两阶段注射策略的建议:转向器,然后是酸.
主要成果:
- 在表面条件下,DDA系统具有较低的粘度,可有效注射.
- 在加热后,系统迅速转化为固态堵塞剂,超过90%的颗粒对转移有所贡献.
- 不溶性有机酸颗粒暂时堵塞高透性通路,促进更深的酸透.
- 生成的有机酸在后处理后逐渐溶解在碳酸盐尺度上,恢复流量并提供自我清洁效果.
结论:
- 开发的DDA系统为异质水库中的酸刺激提供了高效的解决方案.
- 该系统能够结合深度放置,临时插入和自我溶解的能力,提高了刺激效率.
- 在操作上,DDA系统是可行的,用于改善异质水注入井的刺激.
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