Experimental Investigation and Correlation of Treatment in Weak and High-Permeability Formations by Use of Gel Particles
Experimental Investigation and Correlation of Treatment in Weak and High-Permeability Formations by Use of Gel Particles
复制标题
DOI：
10.2118/153557-pa
复制
发表时间：
2013-11-01
影响因子：
1.2
通讯作者：
Civan, Faruk
中科院分区：
文献类型：
--
作者：
Al-Ibadi, Adnan;Civan, Faruk
在含高渗透带和薄弱带的成熟水淹油田，研究了注入可变形凝胶颗粒悬浮液处理近井地层，作为防止钻井液漏失、处理储层渗透率非均质性和控制产水的方法。实验研究了在注入可变形凝胶颗粒悬浮液过程中对这些地层的调节和堵塞以及由此产生的渗透率损害。通过对3800毫升16- 20目沙袋进行的流动测试，可以推断悬浮液的浓度、流速和凝胶颗粒大小对孔隙堵塞过程的影响。在各种条件下，通过专门制定的诊断方程确定了主要的颗粒夹持和渗透率损害机制。使用适当的无量纲组来建立实验数据的几个经验相关性，这可以帮助选择合适的凝胶-颗粒悬浮液和有效的近井地层处理所需的适当应用条件。这揭示了凝胶-颗粒悬浮液对沙层封堵的功能趋势的有价值的见解和信息，有助于在现场成功设计和缓解地层封堵措施。
Near-wellbore formation treatment by injection of suspensions of deformable gel particles is explored as a method of prevention of lost circulation of drilling fluids, handling of reservoir permeability heterogeneity, and controlling water production in mature waterflooded oil fields containing highly permeable and weak zones. Conditioning and plugging of such formations and the resulting permeability impairment occurring during injection of suspensions of deformable gel particles are investigated experimentally. The effect of concentration, flow rate, and gel-particle sizes of suspensions on the prevailing pore-plugging processes is inferred by flow tests conducted with 3,800-md 16- to 20-mesh sandpacks. Prevailing particle-entrapment and -permeability-impairment mechanisms are identified under various conditions by means of specially formulated diagnostic equations. Appropriate dimensionless groups are used to develop several empirical correlations of the experimental data, which can assist in choosing suitable gel-particle suspensions and proper application conditions required for effective near-wellbore-formation treatment. This reveals valuable insights and information about the functional trends of sandpack plugging by gel-particle suspensions, which can help in successful design and mitigation of formation-plugging treatments in the field.