METHOD OF WATER BREAKTHROUGH CONTROL IN GAS WELL Russian patent published in 2014 - IPC E21B47/10 

FIELD: oil and gas industry.

SUBSTANCE: in method of water breakthrough control in the gas well which includes recording of gas consumption and bottomhole pressure between the dates of gas-dynamic research by pressure transient test, determination of values for the first and second master components corresponding to the biggest characteristic numbers of input data covariance matrix including values of zero and firs-order derivatives for gas flow rate, square gas flow rate, bottomhole pressure, analysis of dynamics for the first and second master components in time, plotting curves of their changes in time, conclusion on increase of flooding degree in the bottomhole zone of the stratum when curves of the first and second master components cross, periodical sampling is made for the mixed bottom and condensate water, determination of total minerals content for water samples, determination of specific quantity of bottom water in the well production, inclusion of the rated values for total minerals content for water samples and specific quantity of bottom water in the well production to the input data matrix.

EFFECT: specification of data on changes in gas flow coefficients for the bottomhole zone due to consideration of the main factors characterising flooding degree of the stratum bottomhole zone.