METHOD DETERMINING PRESSURE OF START OF CONDENSATION OF STRATAL GAS Russian patent published in 2001 - IPC

FIELD: running of gas condensate fields. SUBSTANCE: method can be used for establishment of operational conditions. In agreement with method flow rates of stratal gas, condensate and water are measured. Samples are taken while conducting hydrodynamic investigations and component composition of stratal gas is found. In this case pressure and temperature are measured in shaft of hoist within specified measurement intervals as well as pressure and temperature across well-head and well face. Mean values of pressures and temperatures in each measurement are determined by measured values of pressures and temperatures. Densities of gas condensate mixture and stratal gas in each measurement interval are found by measured composition of stratal gas, flow rates of gas, condensate and water and mean values of pressures and temperatures in each measurement interval. Graph of change of densities of stratal gas and gas condensate mixture depending on mean values of pressure in each measurement interval is constructed and pressure of start of condensation of stratal gas is determined by intersection point of curves in graph. EFFECT: increased accuracy in determination of pressure of start of condensation of stratal gas in process of operation of gas wells. 1 dwg, 1 tbl