The invention provides a special heat-
salinity-resistant drag
reducer for
shale gas fracturing. The special heat-salinit-resistant drag
reducer is prepared from the following raw materials by
mass percent: 20-40 percent of nonionic monomers, 10-30 percent of
salinity-resistant monomers, 1-10 percent of an emulsifier, 0.1-0.8 percent of an initiator, 0.1-1.5 percent of
sodium bisulfite, 5-20 percent of an
organic solvent, 1-3 percent of a
phase inversion agent and the balance of deionized water. A
manufacturing technology of the special slickwater resistance
reducing agent comprises the steps of
raw material mixing, modulation and modification, purification for
impurity removal and modulation and modification. The
manufacturing technology is simple, high in production efficiency and low in production cost, and can effectively reduce the production and application costs of the drag
reducer, and meanwhile, the prepared drag reducer is quick in
dissolution, low in
energy consumption, good in shearing resistance, nontoxic,
pollution-free and dust-free, nondestructive to health, good in fluidity, easy to operate, and high in heat-and-
salinity resistance. Therefore, on one hand, the application requirements for
shale gas exploitation are effectively met, and the exploitation cost is lowered, and on the other hand, damages caused by
shale gas resource exploitation to the
natural environment and threats caused by shale gas resource exploitation to the health of operators can be effectively reduced.