GAS WELL OPERATION METHOD Russian patent published in 2014 - IPC E21B43/12 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and namely to operation of gas wells at the closing stage of development, in particular, to operation of gas wells with insufficient gas velocity for liquid export from the bottomhole. The concept of the invention is as follows: according to the method the gas well is equipped with a main production string and a concentric central production string placed in it with formation of annular space between these strings. End surface of the central production string is placed below the end surface of the main production string while gas extraction is carried out simultaneously through the central production string and the annular space. At that extraction of gas through the central production string is made with flow rate that is one and a half times higher than the rate required for liquid extraction from the well and gas flow rate through annular space is set so that it does not exceed the value of operating flow rate. In a pathway of the flow from the central production string a metre is installed and in a pathway of the flow from the annular space an automatic gas flow regulating valve is installed. Then the flows are combined and sent to the similar metre, at that electric signal of the metre installed in the flow of the central production string and the metre of the combined flow are sent to controllers of automatic control system which is used for analysis of received data; and a command is sent to the automatic gas flow regulating valve thus optimising total production rate of the well considering filtration resistance of the well in compliance with analytic expression.

EFFECT: providing optimisation of gas well operation method that allows operation of gas wells without interruption for liquid removal.

3 ex, 1 dwg