灵敏度评估和刺激优化超低透性砂岩水库的优化
1China United Coalbed Methane Corporation, Ltd., Beijing 100016, China.
ACS omega
|October 16, 2023
概括
酸性砂岩水库需要仔细选择流体以防止损坏. 一种新型的多纳米级刺激液与泥酸相结合,在超低透度的形成中,有效地提高了2.68倍的透度.
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
- 储水池的表征 储水池的表征
背景情况:
- 酸化对于低透性水库至关重要,但如果应用不当,可能会造成形成损伤.
- 山油田的桑建芳岩层表现出严重的酸化相关挑战.
- 了解水库特征是优化刺激治疗的关键.
研究的目的:
- 调查圣建芳形成的砂岩水库的特征和损害机制.
- 开发和评估一种用于超低透性储的新型刺激液体系统.
- 在具有挑战性的构成中,为有效的酸化策略提供科学基础.
主要方法:
- 用X射线衍射 (XRD) 分析和扫描电子显微镜 (SEM) 来进行矿物学和微观结构的表征.
- 测量气体的孔隙性和透性,以评估储特性.
- 对各种刺激 (压力,速度,化学物质) 的储灵敏度的评估.
- 实验室开发和实地测试与泥酸结合的多纳米级刺激液体系统.
主要成果:
- 被识别为具有高粘土含量 (考利尼特,蒙特莫里隆尼特) 的田地性石灰岩的水库岩石.
- 它的特点是不和,正常压力储,孔隙性低,透性超低,重型原油.
- 对压力有很高的敏感性,对速度有适度的敏感性,,水,盐和弱酸.
- 联合刺激流体系统实现了最佳的岩石溶解率.
- 在后处理过程中,储透度增加了2.68倍.
结论:
- 由于其矿物学和灵敏度,圣建芳岩层对传统的酸化提出了复杂的挑战.
- 一个定制的多纳米级刺激液体系统,当与泥酸一起使用时,可以有效地克服这些挑战.
- 这种综合方法显著提高了透性,并为类似的超低透性的砂岩水库提供了可行的刺激策略.
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