Downhole flowmeter
AssigneeSchlumberger Technology Corporation
InventorsHarold Pfutzner, Mohammed Badri
Life of this patent
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Abstract
An intelligent completion module includes a flowmeter that uses one or more electromagnetic acoustic transducer (EMAT) sensors and a flow control valve. The flow rate and the speed of sound in the production fluid from a production zone is measured and used to make reservoir management decisions. The flowmeter includes at least two EMAT rings, including one or more EMAT sensors in a circular distribution which can be used in propagation or pulse-echo modes. In a segregated flow regime, a single EMAT sensor in pulse-echo mode is used to measure holdups of fluid components.
Claims7
A method, comprising:
- providing a first tube that conducts a fluid from a first zone, a flow control valve and a flowmeter comprising one or more electromagnetic acoustic transducer (EMAT) ring pairs wherein each of the electromagnetic acoustic transducer (EMAT) ring pairs comprises an electromagnetic acoustic transducer (EMAT) sensor placed circularly around the first tube;
- measuring a first travel time of an acoustic wave generated by a first electromagnetic acoustic transducer (EMAT) ring and received by a second electromagnetic acoustic transducer (EMAT) ring of a first electromagnetic acoustic transducer (EMAT) ring pair;
- measuring a second travel time of an acoustic wave generated by a second electromagnetic acoustic transducer (EMAT) ring and received by the first electromagnetic acoustic transducer (EMAT) ring of the first electromagnetic acoustic transducer (EMAT) ring pair;
- obtaining a derived flow property;
- and
- using the derived flow property to make a reservoir management decision.
A method, comprising:
- providing an electric submersible pump and an electromagnetic acoustic transducer flowmeter in a producing well;
- pumping a fluid from the producing well using the electric submersible pump;
- obtaining a flow property of the fluid using the electromagnetic acoustic transducer flowmeter;
- and
- inferring a parameter of the electric submersible pump from the flow property.
Dependencies are inferred from the claim text.