METHOD OF STEP-BY-STEP ADJUSTMENT OF GAS PRODUCTION Russian patent published in 2016 - IPC E21B43/18 E21B47/10 

FIELD: gas industry.

SUBSTANCE: invention relates to gas industry and can be used to increase the gas recovery rate by step-by-step production regime control. Method involves assessing vapour phase, velocity and flow rate of gas phase, condensed water sampling, the assessment of condensed water - formation, condensation or technogeneous water on each well. Wells subject to be step-by-step adjustment, which is conducted based on excess of the evaluation values of the vapour phase and their design values by analytical expression are singled out. Wells with measured-current values of vapour phase exceeding their design values for the corresponding temperature and pressure conditions are subjected to step-by-step adjustment. When obtaining the current value of vapour phase corresponding to calculated formation temperature and pressure conditions, the well is left in the chosen mode of operation until the first winter extractions to allow replacement of water in proportion to pressure of gas. Discrete change of depression on the well arranged in the range of 5-20 % of the value of depression of winter extractions taken in 3-5 steps is taken as a tool of step-by-step control. Control of the modes is performed during summer extractions with obligatory hydro-metrical control of each stage.

EFFECT: technical result is avoiding premature formation water inflow into the well production, minimization of product flooding, increased the gas recovery rate as a whole, as well as increase of the gas extraction zones of production wells.

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