At present

the research at home and abroad of self-suspension proppant

a new type of proppant

is mainly focus on indoor preparation and field application

but the study of its stimulation mechanism is less. In this paper

the solubility and swelling of self suspension proppant have been evaluated by the theoretical analysis of its suspension performance. Based on the physical simulation and numerical simulation

the dynamic flow mechanism of fluid mixed with sand has been studied

its flow conductivity has been evaluated and the influencing factors have been analyzed. The results show that the density of aggregate

multiple of swelling and viscosity of liquid after hydration are the main factors that affect the settling speed and the realization of self-suspension. Compared with the ordinary proppant

it has longer laying distance and more balanced longitudinal laying mode

and is beneficial to improve the conductivity of fracturing fractures. It has been applied in Qintong sag in Subei Basin twice. Compared with that of conventional guar gum fracturing

the daily production of single well can be increased by more than two times

which shows that the self suspension proppant in sand-carrying fracturing by water can effectively improve the productivity of the fractured wells.