ALGORITHM OF LOCATION OF WATER INFLUX INTERVALS IN GAS WELLS

Abstract

A method is proposed for identifying the well caused the pad flooding in the active operating well stock for locating the interval of water-influx interlayer in order to perform water isolation jobs based on the diagnostics of the producing formation current model. The searching for the pad flooding well is run in three steps: 1) Locating the group of potential wells capable to flood a pad based on estimation of the vapor phase, dynamic characteristics (velocity, flow rate), collection of dropping liquid samples for determination of additional water salinity. 2) Running the monitoring studies of the selected group of wells under the conditions variation (pressure depression) for identifying a well in this group producing with additional water and effecting the gas flow rates in the adjacent wells, the observation system offered being run without the wells shutin with a fast coverage of the entire well stock and with a higher reliability, ensuring safety and cost efficiency. 3) Performing the wide-range spectral neutron gamma-ray logging for diagnostics of the current model of the producing formation based on which the active water-influx intervals and their filtration-capacity properties can be identified to choose a way to perform the water isolation operations.