| CPC E21B 7/04 (2013.01) [E21B 44/00 (2013.01); E21B 47/005 (2020.05); E21B 2200/20 (2020.05)] | 20 Claims |
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1. A method comprising:
receiving real-time downhole data, via mud-pulse telemetry, acquired by one or more sensors of one or more tools of a drillstring disposed in a borehole in a subsurface geologic region during a directional drilling operation, wherein a drill bit of the drillstring breaks rock of the subsurface geologic region to lengthen the borehole, wherein the one or more tools comprise a measurement while drilling (MWD) tool and a rotary steerable system (RSS) tool, and wherein the drillstring comprises a mud-pulse telemetry unit and MWD tool and RSS tool uplink circuitry;
identifying that an insufficient portion of the real-time downhole data is insufficient for use in a hole bottom estimation based at least in part on an operational issue of the MWD tool and the RSS tool uplink circuitry;
identifying an operational issue between the MWD tool and the RSS tool uplink circuitry, wherein the identification of the operational issue triggers an implementation of a blind mode, wherein the blind mode modifies the real-time downhole data to generate modified real-time downhole data, and wherein the modified real-time downhole data excludes measurements from the RSS tool;
inferring, using the modified real-time downhole data, an inferred state of the RSS tool;
based on the insufficient portion, implementing a blind mode for a drilling mode model used to estimate a hole bottom position of a hole bottom, wherein, in the blind mode, the drilling mode model excludes measurements from the RSS tool and includes the inferred state of the RSS tool;
estimating a hole bottom position of a hole bottom using a drilling mode model, the inferred state of the RSS tool, and the modified real-time downhole data generated from the blind mode;
predicting, in real-time, one or more characteristics of the hole bottom of the borehole using the drilling mode model in the blind mode and at least a portion of the modified real-time downhole data; and
controlling the directional drilling operation using the blind mode for the drilling mode model and the one or more of the characteristics of the hole bottom of the borehole, wherein controlling the directional drilling operation includes adjusting an orientation of the drill bit from a first orientation to a second orientation.
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