METHOD FOR SURVEY OF GAS AND GAS-CONDENSATE WELLS Russian patent published in 2014 - IPC E21B47/00 E21B43/34 G01F15/08 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to survey methods of gas and gas-condensate wells, identification of their optimal process modes, and namely to identification of maximum fluid recovery at minimum energy costs, that is minimum pressure losses at different modes of gas-liquid flow. The method includes separation of the well product, measurement of gas discharge and volume, acceptable solid and liquid phases during measurement of liquid phase under separation pressure and upon degasifying in a separate vessel. Measurement of wellhead pressure and temperature is made in several steady modes before stabilisation of the measured parameters at disposal of the separated phases. Measurement of liquid volume and mechanical impurities is made in sequence: in separation mode without pressure release of gas-liquid flow before separation, in separation mode with pressure release in contracting devices (chokes) before separation, in separation mode with pressure release in an ultrasound separator. Maximum volume of the separated liquid is indentified against measured values at minimum hydraulic loss of the gas-liquid mixture. The separated phases are mixed up with the separated gas flow in all separation modes Separation of the liquid-gas mixture is made by even distribution of the separated phases at vertical porous structure and subsequent discharge of the accumulated liquid from it. Gas and liquid flows are directed to product separation upon the mode of ultrasound separation.

EFFECT: expanding the area of well survey at extensive separation modes for gas-liquid mixtures.

6 cl, 1 dwg