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Updated: Sep 15, 2025

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碳酸盐储中酸裂解效率的综合评估和优化:实验见解和现场验证验证

Peng Lu¹, Songlei Li², Jinsong Liu³

¹PetroChina International Iraq FZE West Qurna1, Beijing, China.

|July 16, 2025

概括

这项研究通过开发新的评估方法,增强了复杂碳酸盐储中的酸裂变. 优化的技术显著提高了刺激的成功和产量,解决了异质性挑战.

科学领域:

石油工程是石油工程中的一个.
地质化学地质化学
储水库工程储水库工程

背景情况:

碳酸盐储具有显著的异质性和较差的孔隙性-透性,限制了酸性裂变的有效性,特别是在低孔隙性,低透性的形成中.
优化酸性压裂对于提高从具有挑战性的碳酸盐储库中提升碳化合物回收至关重要.

研究的目的:

系统地评估碳酸盐储中酸性压裂后的有效性.
为优化刺激治疗提供科学和技术指导.
为了确定关键的导电性控制因素,以改善蚀刻模式.

主要方法:

综合多方法评估:实验室实验 (反应动力学,断裂导电性),操作曲线分析,实时断裂监测和生产日志.
在各种条件下,酸蚀刻骨折的量化反应动力学和导电性.
现场验证将操作压力与自然断裂密度相关联,并评估粘度-对比液体.

主要成果:

类似道的酸蚀刻骨折显示电导率比光滑壁样本 (25-40 μm2·cm) 高3-5倍 (120-150 μm2·cm).
粘度对比液体通过选择性蚀刻提高了导电率40%-60%.
在实地测试中观察到压力波动和自然断裂密度之间存在强烈的相关性 (R2=0.85).
开发了动态导电度指标和异质性指数,以更深入地理解理论.

结论:

刺激后的评估与碳酸盐储的处理设计一样重要.
提出的方法,包括粘度差流体设计和实时诊断,显著提高了刺激成功率,从55%提高到82%.
实现了超过35%的持续生产增长,突出了开发的协议的实际影响.

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