Effect of proppant cluster arrangment on fracture conductivity in channel fracturing
High speed channel fracturing is a new fracturing technology that uses proppant clusters to support fractures and obtain higher fracture conductivity.In order to explore the effect of proppant clusters arrangement on the overall fracture conductivity,considering the deformation of proppant cluster and fracture surface under the closure pressure,a fluid coupling flow model in the high-speed channel and proppant cluster was established,and the overall conductivity of fractures under the filling of staggered and opposite proppant cluster was simulated.The influence of the radius and spacing of the proppant cluster on the overall conductivity of the fracture was analyzed.The simulation results show that the decrease of proppant cluster radius and the increase of proppant clusters spacing will lead to the poor support of the fracture.The radius of the opposite and staggered proppant clusters should not be less than 0.100 m,and the spacing of the proppant clusters should not be greater than 0.25 m.Under the same condition,the conductivity of fractures filled by staggered proppant clusters is 53.53％higher on average than that of fractures filled by opposite proppant clusters.
unconventional oil and gaschannel fracturingproppant cluster distributionfracture conductivity
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