FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry, namely to methods of increasing oil recovery of formations, intensification of oil production and stimulation of wells by creating channels in oil formations and devices for their implementation. Method includes installation in well of high-strength tubing, diverter with internal channel passing in it, binding and its possible orientation in space in the interval of lower level of sidetracking, sealing of well mouth, milling windows for each side barrel, installation of downhole equipment consisting of jet nozzle, control unit of trajectory of the shaft, navigation system, working flexible tubing string, flow redistribution device, check valve, flexible tubing supply pipe, liquid supply into tubing annulus / supply tubing, movement of the jet nozzle through the sealing device, through the deflector into contact with the rock, the planned extension of the offshoot, wherein the trajectory of the barrel is determined and varied by means of the barrel and navigation equipment control unit to ensure the barrel wiring along the project trajectory, after driving of the working flexible tubing with the nozzle for the sidetracks wiring at the next levels, the supply and working flexible tubing string are removed from the well, the tubing string is torn off from the mechanical anchor, withdrawing the tubing pipe fitting, preset and equal to the transition length to the next level, washing the well to complete removal of slurry, by actuation of mechanical rotary device deflector is transferred to another plane, tubing is forced on mechanical anchor, working flexible tubing string with downhole equipment is lowered into well, after which work on radial shafts is repeated. When milling windows in casing string cutter is lowered into well on flexible shaft and all projecting windows are cut in one its lowering, after which cutter is lifted; during sidetracking, the current position of the borehole in the formation and the position of the jet nozzle are monitored in real time, using as a navigation equipment a device for tracking the position of the nozzle with a sensor unit connected to the control unit of the borehole trajectory and the jet nozzle; after well flushing, geophysical survey of bottomhole formation zone is carried out by means of additionally introduced into composition of downhole equipment of instruments survey of geophysical properties of rock; transmitting information to ground equipment is carried out by means of a navigation system in the form of current conducting cores built into walls of supply and working flexible tubing string; according to the results of the obtained information, the offshoot is corrected along the project trajectory.
EFFECT: technical result is higher efficiency of oil recovery of reservoirs and intensification of oil production.
2 cl, 3 dwg
