Volume 37 Issue 4
Aug.  2020
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WU Zhiying, LU Baoping, HU Yafei, JIANG Tingxue, SUI Shiyuan. Study on Flowrate Distribution of Fracturing Fluid in Multi-Stage Fractures[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 532-535. doi: 10.3969/j.issn.1001-5620.2020.04.021
Citation: WU Zhiying, LU Baoping, HU Yafei, JIANG Tingxue, SUI Shiyuan. Study on Flowrate Distribution of Fracturing Fluid in Multi-Stage Fractures[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 532-535. doi: 10.3969/j.issn.1001-5620.2020.04.021

Study on Flowrate Distribution of Fracturing Fluid in Multi-Stage Fractures

doi: 10.3969/j.issn.1001-5620.2020.04.021
  • Received Date: 2020-03-17
  • Publish Date: 2020-08-28
  • Hydraulic fracturing is the core technology for the more and more prevailing development of unconventional hydrocarbon such as shale gas. Multistage fracturing has always been used in the development of unconventional hydrocarbon reservoirs. Study on the flowrate distribution in each level of fractures during fracturing has seldom conducted, although the understanding of the flowrate distribution is very important to the understanding of fractures and to the design of fracturing program. An apparatus for experimenting effective sand transport in multistage fractures was developed to study the flowrate distribution in multistage fractures. Using this apparatus, several factors, such as viscosity of fracturing fluid, particle size of proppant, injection rate, sand concentration etc., were studied for their effects om the flowrate distribution of fracturing fluid in multistage fractures. It was found in the study that flow rate was decreasing along the fractures in different descending stages. 64.63% of the flow rate is in the master facture, 22.14% in the first level fractures, and the rest in the second level fractures. The distribution of flowrate in different levels of fractures is also affected by the total flowrate; the higher the total flowrate, the higher the flowrate distributed in the master fracture and the lower the flowrate in the sub-fractures. Other factors, according to their level of importance, are the particle size of proppant, viscosity of fracturing fluid and sand concentration. The study gives birth to a method of evaluating the pattern of flowrate distribution in multistage fractures and reveals the pattern of flow rate distribution in each level of fracture, providing a basis on which the properties of fractures can be understood and fracturing program can be optimized.

     

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