Water suspensible propping agent for oil and gas well fracturing and preparation method thereof

The invention relates to a water suspensible propping agent for oil and gas well fracturing and a preparation method thereof. The water suspensible propping agent of the invention comprises a propping agent aggregate, an expansion layer and an interfacial transition layer arranged between the aggregate and the expansion layer, wherein the expansion layer comprises hydrogel dry powder and a binder for bonding the hydrogel dry powder and is swollen in water; and the interfacial transition layer comprises epoxy resin and/or thermoplastic phenolic resin as the interfacial transition layer resin. 本发明涉及油气井压裂用水中可悬浮支撑剂及其制备方法。根据本发明的水中可悬浮支撑剂包括支撑剂骨料、膨胀层以及骨料与膨胀层之间的界面过渡层；所述膨胀层包含水凝胶干粉和用于粘结水凝胶干粉并在水中可溶胀的粘合剂；所述界面过渡层包含作为界面过渡层树脂的环氧树脂和/或热塑性酚醛树脂。