OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2017 - IPC E21B43/20 E21B43/30 

FIELD: oil and gas industry.

SUBSTANCE: according to the method, drilling of production and pressure wells is carried out. The injecting fluid is pumped through the injection wells and the products are withdrawn through production wells. Oil deposit is developed on the basis of an areal inverted seven-point system which is converted into a system with horizontal wells. For this purpose initial grid of directional wells is determined. Then a horizontal well of the required well bore length is placed in the center between two injection directional wells. At the distance of one pitch of the grid, the directional production wells are replaced with horizontal ones with the same azimuth of the well bore. The resulting well grid is characterized by maintained distance between wells similar to the original grid. The obtained development element is a cell of seven horizontal wells. Within the scope of this system it is possible to change the structure of wells from horizontal to a multi-hole for packing the grid and increase the coverage of the deposit by area and cut, and to change direction of horizontal sections. They can be turned to a desired angle to achieve the development targets. This system is closed and allows implement wells by the cells in the development.

EFFECT: increase of the method effeciency.

3 cl, 1 dwg