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Study on the models for the forced flow-back of fracturing fluid and the backflow of proppant
Author(s): 
Pages: 57-61,3,2
Year: Issue:  5
Journal: Journal of Xi'an Petroleum Institute(Natural Scien

Keyword:  fracturing fluidforced flow-backfracture closure timeproppant backflowsimulation model;
Abstract: To accurately choose the size of blowout choke and predict fracture-closured time is the key to the flow back of fracturing fluid.Based on the related theories to material balance,rock mechanics and fluid mechanics,the migrating model and mechanic model of proppant for determining the size of blow-off choke and the model for calculating the forced closure time of fracturing cracks are established,in which the force acted on proppant,the two-dimensional water-loss and compressibility of fracturing fluid and the friction of well-bore are considered.Using the established models and the given solution method,not only can the critical size of blowout choke be determined but also the fracture closure time be obtained without a lot of pressure-drop data.The field cases verify that the obtained results using the models are reliable and the models can put into practical application.
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