Hydraulic fracturing is an important technical means for stimulation and transformation of oil and gas reservoirs

and has been widely used in the production of major oil fields at home and abroad. After studying a large number of literature research on the fracturing fluid system

it is found that various improvements of the current fracturing fluid system are mainly around “carrying sand”. However

in this paper

a new type of self-supporting fracturing fluid system is innovatively put forward

which completely gets rid of the concept of "carrying sand". In the process of fracturing fluid pumping

there is no solid proppant at all

but the fracturing fluid is combined with the proppant as a whole. When the fluid reaches the target layer

it is

affected by the formation temperature and transformed from liquid phase to solid-state to prop up the fracturing fractures. The obtained self-supporting fracturing fluid system can form supporting solids with certain sphericity and strength at 85 ℃ and in 30 minutes. The upper limit of liquid system viscosity is 45.58 mPa·s

bringing the system good injectivity and stability. The density of the solid-state proppant is 1.07 g/cm

3

the separation coefficient is 1.41

the main particle size range is 20~40 and 40~70 mesh

and the crushing rate is 4.7 % and 8.75 %

respectively.