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- Title
水力压裂支撑剂运移与展布模拟研究进展.
- Authors
潘林华; 王海波; 贺甲元; 李凤霞; 周 彤; 李小龙
- Abstract
Researching the diversion, migration and distribution laws of proppants in wellbores and fracturing fractures can provide theoretical support for the selection of fracturing technologies and fracturing materials and the optimization of fracturing construction parameters, so as to improve the stimulation effect of hydraulic fracturing. By investigating and analyzing a large number of research findings of laboratory experiment, numerical simulation and theoretical analysis, this paper summarized the advantages and disadvantages of laboratory experiments and numerical simulation methods and the migration and distribution characteristics of proppants in wellbores and fracturing fractures. And the following research results were obtained. First, laboratory experiments can provide intuitive observation and analysis on the diversion, migration and distribution characteristics of proppants in wellbores and hydraulic fractures and it is an important means to study the migration and distribution characteristics of proppants in wellbores and hydraulic fractures. However, existing experimental instruments need further improvement and modification. Second, the numerical simulation technology based on computational fluid dynamics (CFD) is an effective supplement to study the migration and distribution laws of proppants. And the computational fluid dynamics coupled with discrete element method (CFD–DEM) can simulate proppant migration more truly, and it is one of the important methods to study proppant migration and distribution characteristics in the future. Third, for single-cluster perforation, proppants are more likely to enter the fracturing fractures connected by the perforations below horizontal wellbores. Fourth, for clustering perforation, proppants are more likely to enter the fractures with the optimal perforation phase angle and azimuth angle. What's more, proppants tend to enter the heel perforation cluster when the viscosity of fracturing fluid is lower. And the increase of fracturing fluid viscosity and injection rate can result in great reduction of proppant diversion difference between perforation clusters. Fifth, for a single plane fracture, fracturing fluid viscosity, proppant size and density, construction displacement and fracture parameters are important factors influencing proppant migration and distribution characteristics. Sixth, compared with the single plane fracture, the geometry of complex hydraulic fracture and the angle of secondary fracture have more complicated influence on proppant migration and distribution, so further special studies shall be needed.
- Subjects
PROPPANTS; FRACTURE mechanics; COMPUTATIONAL fluid dynamics; DISCRETE element method; FRACTURING fluids; HYDRAULIC fracturing
- Publication
Natural Gas Industry, 2020, Vol 40, Issue 10, p54
- ISSN
1000-0976
- Publication type
Article
- DOI
10.3787/j.issn.1000-0976.2020.10.007