使用酶诱导碳酸盐沉进行沙子巩固:对温度和颗粒大小影响的新见解
Kamal Omarov1, Sulaiman A Alarifi2, Mohamed Mahmoud1
1Petroleum Engineering Department, King Fahd University of Petroleum and Minerals, 31261, Dhahran, Saudi Arabia.
Scientific reports
|September 19, 2023
概括
高温可以增强酶诱导碳酸盐沉 (EICP),用于石油和天然气井中的沙子巩固,前提是使用最佳反应剂度. 这种方法有望在具有挑战性的下井条件下提高井口稳定性.
科学领域:
- 地质技术工程 地质技术工程
- 石油工程是石油工程中的一个.
- 生物化学工程 生物化学工程
背景情况:
- 沙子生产是石油和天然气开采的重大挑战,导致运营问题和设施损坏.
- 酶诱导碳酸盐沉 (EICP) 为巩固未巩固的沙子提供了一个环保的解决方案.
- 现有的EICP研究主要集中在环境条件上,在高压,高温下井环境下对其有效性的理解方面存在差距.
研究的目的:
- 为了研究温度升高对EICP反应动力学和效率的影响.
- 评估EICP在热应力下实现的沙结合的统一性.
- 为了确定沙粒大小对EICP整合过程的影响.
主要方法:
- 在25°C至90°C的温度下测试了EICP解决方案.
- 定性分析评估反应进展基于反应剂度 (金属离子>50,000 ppm,多余尿素) 和热暴露.
- 测量了中型 (250-425微米) 和粗型 (>425微米) 沙子样本的凝固强度,并评估了样本半部分的强度均性.
主要成果:
- 高温 (高达90°C) 不妨碍EICP的效率,并且可以通过优化反应剂度来增强反应.
- EICP取得了显著的整合强度:中等沙子约9000psi,粗沙子约5000psi.
- 发现的一个显著挑战是处理样本中的强度分布不均,变化高达8,000 psi.
结论:
- EICP是一种可行的沙结合技术,用于高温石油和天然气作业,温度可能加速反应.
- 仔细控制反应剂度和温度对于最大限度地提高EICP的有效性和反应可控性至关重要.
- 需要进一步的研究来解决EICP处理的沙子强度的不均性,以确保井口稳定性的一致性.
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