FIELD: technological processes.
SUBSTANCE: invention relates to a feedback control method for controlling the concentration of a proppant in a fluid for fracturing a formation to be used in stimulating an underground formation. Method comprises steps of propping filler or proppant suspension from sealed, under pressure of propping filler reservoir into fluid flow for formation fracturing. Fluid medium of liquefied gas is supplied and flow rate of fluid medium is measured by means of a flow meter, and a feedback signal is sent to a computer. Propping agent or proppant suspension is combined with liquefied gas flow and the proppant concentration in the fluid is measured to fracture the formation downstream by the concentration meter, and a feedback signal is sent to the computer. Concentration of fluid medium for formation fracturing is changed by sending signal from computer for direction of compressed fluid medium into propping agent reservoir, for control, thus, pressure in propping agent reservoir, to achieve the desired concentration. Pressure control system is provided to control flow of compressed fluid medium to and from propping agent reservoir. An algorithm is programmed to adjust parameters of the pressure control system by means of conditions measured by the concentration meter and the flow meter.
EFFECT: technical result is improved control of propping filler supply.
3 cl, 2 dwg
