Abstract: The present disclosure provides a method computer-implemented method for conducting a measurement while drilling (MWD) operation in a wellbore of a reservoir, the method comprising: accessing data encoding measurements obtained from a bit tool during the MWD operation in the wellbore of the reservoir, wherein the bit tool includes a gamma ray detector and a magnetometer; extracting, from the measurements, recordings of a gamma ray detector, wherein the recordings comprise gamma ray measurements taken from more than one azimuthal sectors of a depth location in the wellbore; estimating a bulk density at the depth location in the wellbore using the gamma ray measurements from the more than one azimuthal sectors; and based on, at least in part, the estimated bulk density, adjusting the MWD operation.

Abstract: Some implementations of the present disclosure provide a method that include: accessing a plurality of measurement logs taken from more than one well locations of a reservoir, wherein the plurality of measurement logs encode, for each well location, a plurality of parameters; based on applying a petrophysical model to the plurality of measurement logs, determining the plurality of parameters; based on a portion of the plurality of parameters, calculating a compressional formation slowness and a shear formation slowness; and predicting a fluid type at the more than one well locations of the reservoir based on combining the compressional formation slowness and the shear formation slowness with at least one of the plurality of parameters.

Abstract: Some implementations of the present disclosure provide a method that include: accessing a plurality of measurement logs taken from more than one well locations of a reservoir, wherein the plurality of measurement logs encode, for each well location, a plurality of parameters; based on applying a petrophysical model to the plurality of measurement logs, determining the plurality of parameters; based on a portion of the plurality of parameters, calculating a compressional formation slowness and a shear formation slowness; and predicting a fluid type at the more than one well locations of the reservoir based on combining the compressional formation slowness and the shear formation slowness with at least one of the plurality of parameters.