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1. (WO2016153958) METHOD AND SYSTEM FOR CO2 REJECTION WITH A TWO STAGE MEMBRANE PROCESS

Pub. No.:    WO/2016/153958    International Application No.:    PCT/US2016/023023
Publication Date: Fri Sep 30 01:59:59 CEST 2016 International Filing Date: Sat Mar 19 00:59:59 CET 2016
IPC: E21B 43/16
C10L 3/10
B01D 53/22
E21B 43/34
Applicants: PRAXAIR TECHNOLOGY, INC.
Inventors: BURGERS, Kenneth, L.
NOVAK, Richard, A.
Title: METHOD AND SYSTEM FOR CO2 REJECTION WITH A TWO STAGE MEMBRANE PROCESS
Abstract:
The invention relates to a system and method of treating a flow back fluid exiting a well site following stimulation of a subterranean formation. The invention utilizes a two-stage membrane process during the period that the gas contains high concentrations of C02 by volume, and allows for separation of C02 from the natural gas components, providing pipeline-quality natural gas (approximately 5% C02 by volume) to the gas collection system