Fluid loss control agents are used in well cement compositions to reduce the fluid loss from the cement compositions to permeable formations or zones into or through which the cement compositions are pumped. Fluid loss and gas migration control additive NRG-FLOSS 304 makes the process of cementing oil and gas wells technological and reliable. NRG-FLOSS 304 effectively reduces the filtration rate in the field condition and increses the stability of cement system.