METHOD TO INCREASE FORMATION HYDROCARBON YIELD AND INTENSIFY OIL-GAS-CONDENSATE PRODUCTION BY MEANS OF FORMATION RADIAL PENETRATION WITH HYDRAULIC MONITOR AT PRESSURE DRAWDOWN Russian patent published in 2017 - IPC E21B43/16 E21B7/06 E21B21/14 E21B29/06 

FIELD: oil and gas industry.

SUBSTANCE: presented method includes installing in a well high-strength tubing, a mechanical anchor, a mechanical anchor, rotary and sealing devices, a deflecting tool with an inner channel extending therein, positioning and its possible orientation in space in lower level interval of lateral well bore wiring. A disconnector, a circulation unit, a packer and a funnel are and installed in series below the divider. The wellhead is sealed. The hydraulic monitor nozzle, a wellbore path control unit, a navigation system, working coil (flexible tubing), a flow redistribution device, a non-return valve and a supply coil are installed. Aerated liquid is supplied to inter-string space of the tubing string/coil or simultaneously into inter-string space of tubing string/coil and into inner space of the coil or separate pumping of liquid and gas via two given spaces. The aerated liquid enters the lateral well bore and with the destroyed rock products is returned to the well and pulled to the wellhead through the Inter-string space of the tubing/casing string. On the surface, the washing liquid is degassed, cleaned from hydrocarbons and destroyed rock products. If necessary, it is subjected to additional chemical treatment and returned along annular circulation into the well. The hydraulic monitor nozzle is moved through the sealing device through the deflecting tool to the rock contact. The planned drilling of the radial well bore is carried out at the pressure drawdown, when during formation development the bottom-hole pressure is below the formation pressure or equal to it which is determined by the density of the washing liquid reduced due to aeration and, if necessary, performing foam formation to required values and controlled by calculated ratio of gas and washing liquid supplied from the surface providing changing of such relation in accordance with actual bottomhole pressure measured in the lateral well bore. After formation development, the coil with the nozzle is removed from the formation and the well is flushed down for complete removal of mud at pressure drawdown. By actuation of the mechanical turning device, the divider is moved to another plane. The work cycle is repeated for the next lateral well bore. Milling of ports for all lateral well bores shafts is carried out in advance before performing the main operation for development of lateral well bores by means of string annular milling or hydraulic jet cutting of separate ports. When drilling the lateral well bore, the well bore path is determined and changed by supplying the coil with the well bore path control unit and the navigation equipment.

EFFECT: increased efficiency of wells and extraction coefficient of hydrocarbons.

5 cl, 2 dwg