Method for Controlling the Quality of a Gas Produced from Multiple Wells Collected by a Gathering System

Abstract

Using constant pressure to maintain the quality of gas produced from a gathering system. In a gas gathering system where multiple producing wells are feeding a closed system, a change in flow rate/producing pressure at any single well location will have an effect on the producing quality of the other wells on the closed system if the blower/compressor is not adjusted accordingly to compensate for the change. This method automatically adjusts a control unit so that constant pressure is maintained to maintain the quality of the gas.

1 . A method for maintaining a quality of gas produced from a group of wells by maintaining a constant gathering pressure comprising: 
 a. providing a plurality of wells wherein each well is capable of producing a different individual quality and individual volume of gas;    b. providing a gathering line that is connected to the plurality of wells, the gathering line has a total quality and a total volume of gas that results from the sum of the individual qualities and the individual volumes of the wells;    c. providing a compressor that is connected to the gathering line, the compressor gathers and compresses the total volume of gas from the gathering line and introduces the compressed volume of gas to the transmission line;    d. providing a control device that controls the total volume of gas going through the compressor thereby controlling the pressure of the gas in the gathering line;    e. setting the control device for a desired pressure;    f. adjusting the individual volume of gas produced by a particular well in order to maximize the total quality of the gas being produced, thereby adjusting the volume of gas available to the gathering line; and    g. automatically adjusting the control device in response to the change in the volume of gas available to the gathering line so that the desired pressure is maintained and thereby maintaining the quality of gas in the gathering line.    
   
   
       2 . The method as recited in  claim 1  wherein the particular well with the volume adjusted is shut in.  
   
   
       3 . The method as recited in  claim 1  wherein the adjusting the individual volume of a particular well is done automatically by air automated system.  
   
   
       4 . The method as recited in  claim 1  wherein automatically adjusting the control device is done by the combination of a pressure transmitter and a programmable logic controller.