| CPC E21B 49/0875 (2020.05) [E21B 49/02 (2013.01)] | 20 Claims |
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1. A computer-implemented method for characterizing a productive zone at a carbonate reservoir, the method comprising:
accessing, from a server computer, a first input stream of measurements obtained when drilling at a well location of a carbonate reservoir, the first input stream comprising data encoding a flow meter profile and a ratio of water and oil (WOR) at each depth of a range of depths;
accessing, from the server computer, a second input stream of measurements obtained from each depth within the range of depths at the well location;
based on the second input stream of measurements, determining a relationship of measured permeability and measured porosity at each depth within the range of depths at the well location;
based on the first input stream of measurements, analyzing the WOR to determine a derivative of the WOR termed as WOR′ and defined as dWOR/dt as a function of time at each depth within the range of depths;
identifying at least one productive zone at the well location based on a combination of the WOR, the WOR′, the flow meter profile, and the relationship of measured permeability and measured porosity at each depth within the range of depths such that the at least one productive zone is identified despite swings in the measured permeability, the measured porosity, and the flow meter profile that would otherwise lead to varied characterization of the at least one productive zone; and
responsive to identifying the at least one productive zone, transmitting, to a display device, information encoding the WOR, the WOR′, the flow meter profile, the measured permeability, and the measured porosity so that changes of wellbore conditions at the identified at least one productive zone of the well location inside the carbon reservoir are visually monitored as a function of time at the display device while the first and second input streams of measurements arrive at the server computer.
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