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| Study on the transportation law of glass bead proppant in complex coal seams with different discharges |
| Hao Jun1, Zhang Qian2, Ma Sicong3, Yin Xianlong3 |
| 1. Shanxi Lu'an Group Yuwu Coal Co., Ltd., Changzhi 046103, China; 2. Zaozhuang Mining Industry (Group) Co., Ltd., Zaozhuang 277000, China; 3. School of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590 China |
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Abstract Hydraulic fracturing proppant is a key material used to support hydraulic fractures in reservoir fracturing modification. A proppant with excellent shape can improve the proppant transport efficiency, so this paper investigates the use of glass beads as proppant. In order to explore the transport law of glass beads proppant under different displacements in complex coal seams, this paper adopts the control variable method, and takes the transport displacement as the variable, and conducts the transport experiments in the fracturing proppant transport and sand spreading simulation device. The results show that small displacement is favourable for glass beads proppant to fill near-entry fractures, and large displacement is favourable for filling fractures in more distant and deeper layers. In the main fracture, the sandbank of the large-displacement experimental group can reach equilibrium faster compared with that of the small-displacement experimental group, and with the increase of the displacement, the filling rate of the 1.2L/min displacement group is 34.5%, 38%, and 69% more than that of the 2.1L/min, 3.0L/min, and 4.3L/min displacement groups, respectively, and the larger the discharge, the smaller the filling rate of the sand embankment of the main crack.
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