METHOD FOR DEVELOPING MULTI-LAYER GAS DEPOSITS FIELDS WITH LOW-PERMEABILITY RESERVOIRS Russian patent published in 2021 - IPC E21B43/14 

FIELD: gas industry.

SUBSTANCE: invention relates to methods for extracting gas from drilling wells at several horizons and can be used in the gas production industry in the development of multi-layer gas fields composed of low-permeable reservoirs and separated by fluid-resistant rocks. The method involves drilling an inclined-directional well with an ascending end of the trunk. In this case, the well profile is previously divided into six zones. When drilling in the first zone, a set of the zenith angle of the well profile is provided, in the second zone, the well profile is flattened, in the third zone, the zenith angle of the well profile is reset, in the fourth zone, the zenith angle of the well profile is stabilized, in the fifth zone, the well profile is rotated, with a further set of the zenith angle in the sixth zone, while the profile is rotated in the fifth zone starting from the roof of the target reservoir with a deepening into it, but without reaching its lower stratigraphic boundary.

EFFECT: increase in the efficiency of joint operation of productive horizons of multi-layer gas fields, composed of low-permeable reservoirs, separated by fluid-resistant rocks, increasing the productivity of wells and creating conditions for effective removal of accumulated liquid to the daytime surface, due to the set of the zenith angle in the sixth zone of the well profile.

1 cl, 1 dwg