Coiled Tubing Fracturing Tube Pressure Loss Prediction Model

Abstract:

A coiled tubing pressure loss prediction model was established by fluid dynamics theory and method which based on the basic characteristics of the non-Newtonian fluid rheology; Construction displacement, sand ratio and well depth parameters of the pressure loss in the pipe, and calculated pipe pressure loss when the actual pumping process through examples. Thesis proposes: (1) the bend within the pressure loss is an important part of the pressure loss, should be based on the construction object to choice coiled tubing length reasonable, and minimize elbow paragraph length in order to reduce the pipe friction pressure loss. (2) Flow and sand ratio have the same impact of the law with the depth changes in the pressure loss of the straight pipe segment and elbow segment, increases linearly with the depth, flow or sand ratio the larger, more dramatic increase with the depth. Flow or sand ratio the larger the total pressure loss of the tube with the depth decreasing amplitude the greater. (3) According to the actual pump injection procedure, the tube fluid rheological parameters will change, inject pre-flush and replacement fluid the pipe pressure loss low; inject sand mixing liquid friction pressure loss high.

• Periodical: Advanced Materials Research (Volume 746)
• Pages: 515-519
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.746.515
• Online since: August 2013
• Authors: Dan Qiong Li, Shi Cheng Zhang, Suian Zhang
• Keywords: Coiled Tubing Fracturing, Flow Pattern, Prediction Model, Pressure Loss, Sand Ratio

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