There are several important chemicals are injected during hydraulic fracturing.

Some of them are given below:

· Hydrogen Peroxide – used to reduce viscosity of FR

· Biocide – used to control bacteria which can cause instability in viscosity

· Scale inhibitor – used to prevent iron and scale accumulations, and to enhancing permeability

· Linear gel – eases placing proppant in fractured formations

· Cross-linker

· Buffer

· Surfactant

Applicable codes & standards:

· API 6A

· API 16C

· NACE MR0175/ISO 15156

· CE/PED

· DNV 2.7-1

· GOST 28996-91