Patent ID: 11859488
Assignee: BP EXPLORATION OPERATING COMPANY LIMITED
Field: Measurement (Instruments)
Classification: CPC E  G | IPC E  G

Claim 0:
1. A method of identifying inflow locations along a wellbore, the method comprising:
obtaining an acoustic signal from a sensor within the wellbore, wherein the acoustic signal comprises a plurality of acoustic samples across a plurality of depth intervals along the wellbore;
determining a plurality of frequency domain features from the acoustic signal, wherein the plurality of frequency domain features are obtained for each acoustic sample of the plurality of acoustic samples across the plurality of depth intervals, and wherein the plurality of frequency domain features are determined from a frequency domain representation of the acoustic signal in the time domain;
inputting, for each depth interval of the plurality of depth intervals, one or more frequency domain features of the plurality of frequency domain features into each fluid flow model of a plurality of fluid flow models, wherein each fluid flow model is a machine learning model, wherein each of the fluid flow models of the plurality of fluid flow models identifies as an output one of: a presence of at least one of a gas phase inflow, an aqueous phase inflow, and a hydrocarbon liquid phase inflow at one or more depth intervals of the plurality of depth intervals along the wellbore, wherein at least two of the plurality of fluid flow models are different
determining, for each of the depth intervals of the plurality of depth intervals, the output from each fluid flow model; and
identifying, based on the output of each fluid flow model, the presence of at least one of the gas phase inflow, the aqueous phase inflow, or the hydrocarbon liquid phase inflow at one or more of the depth intervals along the wellbore,
identifying, using the plurality of fluid flow models, a presence of at least one of a gas phase flow, an aqueous phase flow, or a hydrocarbon liquid flow;
identifying a fluid flow regime based on the identifying of the at least one of the gas phase inflow, the aqueous phase inflow, the hydrocarbon liquid phase inflow, the gas phase flow, the aqueous phase flow, or the hydrocarbon liquid flow using the plurality of the frequency domain features at the inflow locations.