纳米二氧化硅凝胶用于断裂储层关水的长期研究。

IF 5 3区 化学 Q1 POLYMER SCIENCE Gels Pub Date : 2024-10-11 DOI:10.3390/gels10100651
Ahmed Ali, Mustafa Al Ramadan, Murtada Saleh Aljawad
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引用次数: 0

摘要

长期以来,硅酸盐凝胶一直被用作石油油田的断水剂,以解决产水量过高的问题。近年来,纳米二氧化硅凝胶作为传统硅酸盐凝胶的一种有前途的替代品出现了,其堵水性能可能会得到改善。然而,这些凝胶的长期有效性仍不确定,给持续盈利带来了挑战。因此,我们对在 200 °F 下使用 75/25 wt%(二氧化硅/活性剂)纳米硅凝胶处理的裂缝和诱导通道样品进行了为期 6 个月的综合研究。与使用聚丙烯酰胺/聚乙烯亚胺 PAM/PEI 凝胶(9/1 wt%)处理的样品进行了对比分析,以比较两种体系的性能。在 167 °F 的地层水中的整个老化期间,定期进行耐久性测试,并辅以计算机断层扫描 (CT) 来监测任何潜在的降解。结果显示,与 PAM/PEI 凝胶相比,纳米二氧化硅凝胶在堵塞裂缝和通道方面的长期性能更优越。即使在 6 个月后,纳米二氧化硅凝胶在 1000 psi 压力下仍能保持 100% 的出色堵塞效率,在中间裂缝样品中的最大漏出率为 0.088 cc/min,在诱导通道样品中的最大漏出率为 0.027 cc/min。相比之下,PAM/PEI 凝胶在压裂样品(最大漏失率为 5.5 毫升/分钟)和诱导通道样品(最大漏失率为 0.036 毫升/分钟)中的堵塞效率分别降至 99.15%和 99.99%。这些发现凸显了纳米二氧化硅凝胶作为一种更耐用的关水剂在管理裂缝和通道产水量方面的潜力。
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Long-Term Investigation of Nano-Silica Gel for Water Shut-Off in Fractured Reservoirs.

Silicate gels have long been utilized as water shut-off agents in petroleum fields to address excessive water production. In recent years, nano-silica gel has emerged as a promising alternative to traditional silicate gels, offering potentially improved plugging performance. However, the long-term effectiveness of these gels remains uncertain, posing challenges to sustained profitability. Therefore, a comprehensive study spanning 6 months was conducted on fractured and induced channel samples treated with nano-silica gel of 75/25 wt% (silica/activator) at 200 °F. A comparative analysis was performed with samples treated using polyacrylamide/polyethyleneimine PAM/PEI gel (9/1 wt%) to compare the performance of both systems. Throughout the aging period in formation water at 167 °F, endurance tests were conducted at regular intervals, complemented by computed tomography (CT) scans to monitor any potential degradation. The results revealed nano-silica gel's superior long-term performance in plugging fractures and channels compared to PAM/PEI gel. Even after 6 months, the nano-silica gel maintained a remarkable 100% plugging efficiency at 1000 psi, with a maximum leak-off rate of 0.088 cc/min in the mid-fractured sample and 0.027 in the induced channel sample. In comparison, PAM/PEI gel exhibited a reduction in efficiency to 99.15% in the fractured sample (5.5 cc/min maximum leak-off rate) and 99.99% in the induced channel sample (0.036 cc/min maximum leak-off rate). These findings highlight the potential of nano-silica gel as a more durable water shut-off agent for managing water production in fractures and channels.

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来源期刊
Gels
Gels POLYMER SCIENCE-
CiteScore
4.70
自引率
19.60%
发文量
707
审稿时长
11 weeks
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