DEFINITION METHOD OF CURRENT CONDENSATE SATURATION IN HOLE-BOTTOM REGION IN GAS-CONDENSATE RESERVOIR BED Russian patent published in 2010 - IPC E21B47/00 

FIELD: oil-and-gas production.

SUBSTANCE: before the beginning of well development there are measured parametres of reservoir bed and formation fluid by traditional methods of logging including neutron and by means of analysis of samples of core and fluid. For development well it is created numerical model of neutron response changing for measured parametres of stratum, formation fluid and proposed condensate saturation. Proposed condensate saturation is defined by method of hydrodynamic modelling of composition of gas-condensate mixture for measured parametres of stratum, formation fluid and functions of relative permeability. In operation process at reduction of well productivity it is implemented neutron logging. There are compared measured signals of neutron logging and signals of created numerical model. It is defined current condensate saturation by results of coincidence of measured and modelled signals of neutron logging.

EFFECT: increasing of determination accuracy of current value of condensate saturation in hole-bottom region as cased as and uncased borehole.