Saudi Arabian Oil Company

Rena Shi

Hooisweng Ow

Sehoon Chang

Jason R Cox

Wei Wang

Bora Yoon

The disclosure features methods of analyzing a fluid extracted from a reservoir, the methods including introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time t, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t>t, where t−tis greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.

Tracers for petroleum reservoirs

A method, system, and taggants (tracers) for quantifying zonal flow in a multi-lateral well having a wellbore with a first lateral and second lateral. The technique includes flowing first produced fluid from a formation via the first lateral into production tubing providing a first taggant through a first dosing tubing to the first lateral, and flowing second produced fluid from the formation via the second lateral into the production tubing and providing a second taggant through a second dosing tubing to the second lateral. A produced stream having the first produced fluid and the second produced fluid flows uphole through the production tubing and discharges from the wellbore. The produced stream may be analyzed to measure an amount of the first taggant in the produced stream and an amount of the second taggant in the produced stream.

Quantifying zonal flow in multi-lateral wells via taggants of fluids

The disclosure features methods of analyzing a fluid extracted from a reservoir, the methods including introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time to, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t>t, where t−tis greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.

The disclosure features methods of analyzing a fluid extracted from a reservoir, the methods including introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time t, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t&#x3e;t, where t&#x2212;tis greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.

Analyzing a fluid extracted from a reservoir includes introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time t, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t&#x3e;t, where t-tis greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.

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Cambridge, MA, United States of America

Rena Shi