METHOD OF PARAMETERS DETERMINATION OF MAXIMUM PROCESS MODE OF GAS FIELD Russian patent published in 2015 - IPC E21B47/00 E21B43/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, and can be used to justify the process modes of the gas fields including system of gas production and preparation for transport. Under the method the gas dynamic model of the gas production system is created, it combines wells with the field gas gathering system. To this model the result of the field surveys are entered per each well in form of the well gas pressure vs. gas flowrate. Then the model is set to the actual operation parameters of the gas production system during the previous period. Formation pressure is set for each well, and pressure is determined at input of the system for gas preparation for transport at different gas extraction at the field in accordance with actual data of the previous operation period of the field. At that position of the controlled chokes in the well piping is determined depending on the assurance of the minimum reservoir energy losses upon meeting the geologic and technical constraints for the well and gas gathering system safe operation. The gas dynamic characteristic of the gas production system is obtained. The gas dynamic model of the system of gas preparation for transport is created, it combines the gas cleaning, dehydrating, compression and intrafield transport units, the model as the previous gas dynamic model is set to the actual operation parameters of the system of gas preparation for transport for the previous period. Pressure at the said system input is set, and its input pressure is determined at various gas extraction at the field, determining position of the controls on the condition to ensure maximum gas production at minimum formation pressure losses and meeting the geologic and technical constraints ensuring safe operation of the said units. The gas dynamic characteristic of the system of gas preparation for transport is obtained, it is plotted on the same curve together with the gas dynamic characteristic of the gas production system. At the curves cross point the maximum process mode of the gas field is determined. This mode includes input pressure of the system of gas preparation for transport, and gas production volume with the appropriate operation parameters of the well, gas gathering system, gas cleaning, dehydrating, compression, intrafield transport units are determined during peak gas extractions meeting the safe operation of the said wells, systems and units.

EFFECT: increased gas production volumes due to improved operation conditions of the gas wells and process equipment, and assurance of safe operation of the gas field.

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