METHOD OF UNDERGROUND-SURFACE DEVELOPMENT OF HIGH-VISCOSITY OIL FIELD IN THE PASS OF MINE WORKINGS AND THE DEVICE OF MICRO-TUNNEL FOR IMPLEMENTATION THE SAME Russian patent published in 2018 - IPC E21B43/24 E21C41/24 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to the oil industry and can be used when developing a high-viscosity oil field. Method includes penetrating underground mining by micro-tunneling with input inclined, horizontal, output sloping sections followed by drilling from a horizontal section of underground steam distribution and production wells and the installation of sealed bridges in the inclined and outgoing inclined sections of the micro-tunnel, with the transfer of its operation to the mode of a horizontal large-diameter borehole. Oil is pumped by a submersible centrifugal pump from a micro-tunnel and controls the supply of steam to the ground and underground wells by a single control system with the injection of steam or its mixture with surfactants through a steam line into the steam distribution subterranean wells for the further warm up the lower part of the massif and equalize the heat input to the array along the steam distribution wellbore. Steam with high temperature and pressure and a system for gas removal of oil gases is used. Reinforced concrete pipes of the micro-tunnel are equipped with manholes with removable plugs, which are dismantled from the interior of the micro-tunnel to drill underground wells through open hatches and installations to the freed flanges of wellhead equipment of underground wells. Reinforced concrete pipes are equipped with unified fasteners to install equipment and prevent the position of pipes in the circumferential direction.

EFFECT: it is possible to realize the unmanned operation of the deposit, raise the temperature and pressure of the steam supplied to the surface and underground steam distribution wells, and to equalize the distribution of heat along the underground wells and in the massif, that is favorably affects the increase in oil production.

6 cl, 3 dwg