INTERWELL HYDRAULIC TESTING METHOD IN GAS CONDENSATE FIELDS Russian patent published in 2024 - IPC E21B47/06 

FIELD: oil and gas industry.

SUBSTANCE: method of cross-well hydraulic testing in gas-condensate fields is claimed, in which pressure changes occurring in reacting wells are monitored when fluid production in disturbing wells changes. Based on the results of these studies, the permeability coefficient of the formation, the hydraulic conductivity of the formation, the piezoelectric conductivity of the formation in the well drainage zone, as well as the skin effect and conductivity of tectonic disturbances identified from seismic data are determined. Then the operating mode in the exciting well is sharply changed and the pressure in one or more responding wells is monitored over time, and the sufficiency of excitation is confirmed by a mandatory preliminary calculation of the minimum response time of the wells after the start of excitation, after which the anomaly of pressure changes in the responding well will exceed the threshold value. The nature of well interaction is assessed by analysing the shape of response curves based on mathematical modelling using KAPPA SAPHIR software. In this case, the preliminary calculation is based on the value of the stable flow rate of the exciting well, which is maintained during the design time of the experiment after the start of excitation.

EFFECT: refinement of the geological and gas-hydrodynamic models with data on the anisotropy of productive formations and the meso-heterogeneity of deposits, which will improve the quality of planning geological and technical activities and the choice of completion trajectory for wells with a horizontal wellbore end.

1 cl, 4 dwg