System for gathering gas from a gas field comprising a high efficient high pressure compressor

Abstract

A system includes a high pressure compressor having a gas input and a gas output. The gas input is coupleable to a gas field for receiving a gathered gas with a first gas pressure, and the gas output is coupleable to a gas export system for providing the gas with a second gas pressure, which is higher than the first gas pressure, to the gas export system. The system also includes a measuring unit coupled to the gas input. The measuring unit measures an input mass flow value indicative of an input mass flow at the gas input. The system also includes a mass flow control unit that is coupled to the measuring unit for receiving the measured input mass flow value and the gas input for controlling the input mass flow such that the measured input mass flow value corresponds to a set point input mass flow value.

1 . A system for gathering a gas from a gas field, the system comprising:
 a high pressure compressor comprising a gas input and a gas output, wherein the gas input is coupleable to the gas field for receiving the gas gathered from the gas field with a first gas pressure, wherein the gas output is coupleable to a gas export system for providing the gas with a second gas pressure to the gas export system, and wherein the second gas pressure is higher than the first gas pressure;   a measuring unit coupled to the gas input, wherein the measuring unit is configured to measure an input mass flow value that is indicative of an input mass flow at the gas input;   a first low pressure compressor that is connectable to a first wellhead arrangement of the gas field for receiving the gas from the first wellhead arrangement, wherein the first low pressure compressor is connected to the gas input for providing the gas to the gas input with a first mass flow;   a second low pressure compressor that is connectable to a second wellhead arrangement of the gas field for receiving the gas from the second wellhead arrangement, wherein the second low pressure compressor is connected to the gas input for providing the gas to the gas input with a second mass flow; and   a mass flow control unit, wherein the mass flow control unit is coupled to the measuring unit for receiving the measured input mass flow value,   wherein the mass flow control unit is further connected to the first low pressure compressor for controlling the first low pressure compressor, and the second low pressure compressor for controlling the second low pressure compressor such that the first mass flow and the second mass flow are controllable for controlling the input mass flow at the gas input such that the measured input mass flow value corresponds to a set point input mass flow value.   
     
     
         2 . The system according to  claim 1 , further comprising:
 a first delivery valve that is connectable to the first wellhead arrangement of the gas field for receiving the gas from the first wellhead arrangement, wherein the first delivery valve is connected to the gas input for providing the gas to the gas input with a further first mass flow; and   a second delivery valve that is connectable to the second wellhead arrangement of the gas field for receiving the gas from the second wellhead arrangement, wherein the second delivery valve is connected to the gas input for providing the gas to the gas input with a further second mass flow,   wherein the mass flow control unit is connected to the first delivery valve for controlling the first delivery valve and the second delivery valve for controlling the further second mass flow such that the further first mass flow and the further second mass flow are controllable for controlling the input mass flow at the gas input.   
     
     
         3 . The system according to  claim 1 , further comprising:
 a return flow tubing that is connected to the gas output for bleeding off a part of the gas from the gas output and is connected to the gas input for injecting the part of the gas in the gas input,   wherein the mass flow control unit is coupled to the return flow tubing for controlling the bleeding off of the part of the gas from the gas output and for controlling the injecting of the part of the gas in the gas input such that the input mass flow at the gas input is controllable.   
     
     
         4 . The system according to  claim 1 , further comprising:
 a bypass tubing that is connected to the gas input for bleeding off a further part of the gas from the gas input,   wherein the mass flow control unit is coupled to the bypass tubing for controlling the bleeding off of the further part of the gas from the gas input such that the input mass flow at the gas input is controllable.   
     
     
         5 . A method for controlling a gas mass flow of a system for gathering gas from a gas field, the method comprising:
 measuring an input mass flow at a gas input of a high pressure compressor, wherein the gas input receives the gas gathered from the gas field with a first gas pressure, wherein the high pressure compressor comprises a gas output for providing gas with a second gas pressure to a gas export system, and wherein the second gas pressure is higher than the first gas pressure;   measuring, by a measuring unit that is coupled to the gas input, an input mass flow value that is indicative of an input mass flow at the gas input;   receiving, by a mass flow control unit, the measured input mass flow value, wherein a first low pressure compressor is connectable to a first wellhead arrangement of the gas field for receiving the gas from the first wellhead arrangement, wherein the first low pressure compressor is connected to the gas input for providing the gas to the gas input with a first mass flow, wherein a second low pressure compressor is connectable to a second wellhead arrangement of the gas field for receiving the gas from the second wellhead arrangement, and wherein the second low pressure compressor is connected to the gas input for providing the gas to the gas input with a second mass flow; and   controlling, by the mass flow control unit coupled to the gas input, the input mass flow,   wherein the mass flow control unit is coupled to the measuring unit for receiving the measured input mass flow value, and   wherein the mass flow control unit is further connected to the first low pressure compressor for controlling the first low pressure compressor and the second low pressure compressor for controlling the second low pressure compressor such that the first mass flow and the second mass flow are controllable for controlling the input mass flow at the gas input such that the measured input mass flow value corresponds to a set point input mass flow value.   
     
     
         6 . The system according to  claim 1 , further comprising:
 a return flow tubing that is connected to the gas output for bleeding off a part of the gas from the gas output and is connected to the gas input for injecting the part of the gas in the gas input, wherein the mass flow control unit is coupled to the return flow tubing for controlling the bleeding off of the part of the gas from the gas output and for controlling the injecting of the part of the gas in the gas input such that the input mass flow at the gas input is controllable.   
     
     
         7 . The system according to  claim 2 , further comprising:
 a bypass tubing that is connected to the gas input for bleeding off a further part of the gas from the gas input,   wherein the mass flow control unit is coupled to the bypass tubing for controlling the bleeding off of the further part of the gas from the gas input such that the input mass flow at the gas input is controllable.   
     
     
         8 . The system according to  claim 3 , further comprising:
 a bypass tubing that is connected to the gas input for bleeding off a further part of the gas from the gas input,   wherein the mass flow control unit is coupled to the bypass tubing for controlling the bleeding off of the further part of the gas from the gas input such that the input mass flow at the gas input is controllable.