Patent ID: 6944563

Claim:
A method to allocate a flow back to a plurality of sources ( 22 a , 23 a , 24 a ) in an oil and/or gas production system ( 1 ), in which a composition of at least one phase of each of the sources ( 22 a , 23 a , 24 a ) is known and associated with each source, and the flow from the sources is transported as a mixed flow ( 20 ) in one pipeline ( 4 ), said method comprising the steps of: measuring the mixed flow of the at least one phase, said measurement being made in or after a pipeline ( 4 ), analyzing the composition ( 25 ) of the at least one phase of the mixed flow ( 20 ), by means of a device ( 7 ) which uses fluid samples from the mixed flow ( 20 ), which samples are taken in or after the pipeline ( 4 ), accessing data for said measured mixed flow ( 20 ) and said analyzed composition and making them available to a computing device ( 9 ), calculating in said computing device ( 9 ) the flow ( 22 b , 23 b , 24 b ) from each source ( 22 a , 23 a , 24 a ) by means of an allocation algorithm, which allocation algorithm utilizes said measured mixed flow ( 20 ), said analyzed composition ( 25 ) and said composition of at least one phase associated with each source to allocate the flow ( 22 b , 23 b , 24 b ) back to said plurality of sources ( 22 a , 23 a , 24 a ).