| CPC E21B 49/005 (2013.01) [E21B 44/00 (2013.01); E21B 49/003 (2013.01); E21B 2200/20 (2020.05)] | 20 Claims |
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1. A computer-implemented method, comprising:
determining, using drilling parameters and mud properties for a well while drilling the well, a cutting concentration in annulus (CCA) for the well, wherein the well is a gas well or an oil well;
determining, based at least on the CCA, an effective mud weight of mud used while drilling the well;
determining, based at least on the effective mud weight and the mud properties of the well, an equivalent circulating density (ECD) of mud used in the well;
estimating, using the ECD, a bulk density model, and a bulk density log, a bulk formation rock density (RHOB) of cuttings from the well, wherein the cuttings are produced by drilling the well through rock formations;
estimating, based at least on the RHOB, a fluid formation density (RHOF) of the mud;
estimating, based at least on the RHOB and the RHOF, a matrix formation rock density (RHOM) for the well;
evaluating, based at least on the RHOB, the RHOM, and the RHOF, a porosity of geological structures through which the well is drilled;
estimating, based at least on the porosity, a formation resistivity factor (FR) of formations, including geological structures, through which the well is drilled;
evaluating, based at least on the RHOB, a velocity of wave propagation of waves through the formations;
estimating, using a correlation of the bulk density model and the velocity of wave propagation, an ultimate compressive strength (UCS) for the well; and
controlling a downhole equipment using the UCS for the well during wellbore operations, by adjusting drilling parameters comprising a drill bit speed and a drill bit direction, the wellbore operations comprising forming the well.
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