碳酸盐形成的矩阵酸处理的机械分析:一个实验性的核心洪水研究研究
1Petroleum Engineering Department, Research Institute of Petroleum Industry (RIPI), Tehran, Iran.
Heliyon
|February 7, 2024
概括
用高压-高温 (HP-HT) 实验确定了碳酸盐酸化最佳的酸注射速率. 注射速率为7厘米3/分钟,最大限度地提高了透性,同时最大限度地减少了酸突破和消耗.
科学领域:
- 石油工程是石油工程中的一个.
- 储水池刺激的方法
- 地质化学 地质化学
背景情况:
- 酸化操作对于提高石油和天然气储库生产率至关重要.
- 对虫洞形成机制及其对酸注射率的影响的详细了解仍然有限.
- 碳酸盐储由于复杂的溶解模式而存在独特的挑战.
研究的目的:
- 研究高压高温 (HP-HT) 条件下碳酸盐岩中虫洞形成和传播的机制.
- 确定最佳的酸注射速率,以最大限度地提高水库的透性.
- 将实验结果与核心废水分析和CT扫描成像相关联.
主要方法:
- 在碳酸核样本上进行了HP-HT酸注射实验,使用15%重量%的HCl.
- 利用计算机断层扫描 (CT) 扫描成像可视化虫洞演变.
- 监测压力下降形状和透度变化;分析核心废水样本.
主要成果:
- 确定了最佳的酸注射速率为7cm3/min,产生了11.2.2的透性改善系数 (Kf/Ki).
- 这种最佳速度最大限度地降低了酸突破量和酸消耗.
- CT扫描显示单个,虫洞主导的流量以最佳速度,与形 (低速率) 或分支 (高速率) 结构形成鲜明对比.
结论:
- 该研究确立了7cm3/min作为HP-HT条件下碳酸岩的HCl酸化最佳注射速率.
- 虫洞形态显著影响酸运输和储刺激的有效性.
- 结果为优化油田现实设置中的酸化操作提供了实用的见解.
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