Bunger, Andrew and Wang, Di and Mian, Chen and Jianzheng, Su and Fengxia, Li
(2019)
Supporting Data: Parameters Affecting the Distribution of Pulsed Proppant in Hydraulic Fractures.
[Dataset]
(Submitted)
Abstract
Di Wang, Fengxia Li and Jianzheng Su, SINOPEC Petroleum Exploration and Production Research Institute, Beijing
Mian Chen, Institute of Unconventional Oil and Gas, Northeast Petroleum University and State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing
Andrew. P. Bunger, Department of Civil and Environmental Engineering and Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, USA
Intermittent proppant injection into hydraulic fractures is a newly-developing technology in well stimulation. It is designed to form voids inside proppant packs which serve as highly conductive channels for oil and gas transport. This paper models proppant transport in a PKN fracture in which the proppant-laden and proppant-free fluids are pumped intermittently. Simulations are performed to investigate proppant transport and final distribution under the influence of rock Young’s modulus, fluid injection rate, leakoff coefficient, fluid visocisity, and periodicity of proppant pulses. The simulations show that proppant concentration inside a hydraulic fracture from wellbore bottom hole to fracture tip is non-uniform and appears like a damped wave. An equation which is similar to damped wave solution is used to describe this proppant concentration characteristic, thus enabling a dimensional analysis to identify the key parameters affecting proppant distribution and specifically the attenuation of the concentration waves. Two characteristic lengths, including and excluding leakoff coefficient, are presented to rapidly characterize the distance over which the concentration waves attenuate.
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