Calculation model of static settling velocity of fiber-containing proppant clumps
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TE357.1

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    Abstract:

    During hydraulic fracturing,the pulsed injection of fiber-containing proppant clumps effectively preserves their integrity during fracture transport and settling,resulting in columnar propped fractures. Through our experiment,the integrity of fiber-containing proppant clumps was shown. The fracturing fluid-fiber-proppant mixture was treated as a singlephase fluid. The physical property of the mixture was obtained via corrected rheological property. The gravity,buoyancy,wall friction and flow resistance of fiber-containing proppant clumps in static settling were considered to establish the formula of settling velocity and its substitute algorithm for numerical calculation. By comparing the settling velocities of the fiber-containing proppant clumps,we found that the predicted results of the model were in good agreement with the experimental results. The settling velocities affected by proppant density,proppant volume fraction,clump diameter and fracture width were further calculated. As a result,the settling velocity rises with the increase in proppant density,proppant volume fraction and fracture width. However,it is little influenced by clump diameter. This model provides an effective method to calculate the static settling velocity of fiber-containing proppant clumps and a theoretical basis for the calculation of their transport.

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ZHANG Tao, ZENG Xianjin, GUO Jianchun, YANG Ruoyu, ZHOU Hangyu, LIU Jiawen, ZHANG Xiangyu. Calculation model of static settling velocity of fiber-containing proppant clumps[J]. Petroleum Geology and Recovery Efficiency,2021,28(1):144~150

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  • Received:
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  • Online: February 19,2021
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