A non-transitory computer readable medium storing a set of instructions, executable by a computer processor, the set of instructions comprising functionality for:
- receiving a first set of formation properties across a first depth interval in a first wellbore penetrating a subsurface region, the first set of formation properties comprising:
- a first plurality of well logs measured by at least one logging tool, wherein the first plurality of well logs comprises a first non-nuclear magnetic resonance (NMR) well log;
- and
- an interpreted facies, a capillary pressure curve, and a saturation height function (SHF derived from a core sample dataset obtained by physically extracting a core sample from the first wellbore;
- generating a hydrocarbon pore volume (HcPV) prediction method based, at least in part, on the first set of formation properties, wherein the HcPV prediction method predicts a predicted HcPV, a predicted facies, and a developed SHF;
- receiving a second set of formation properties across a second depth interval in a second wellbore penetrating the subsurface region, the second set of formation properties comprising:
- a second plurality of well logs measured by the at least one logging tool, wherein the second plurality of well logs comprises an NMR well log and a second non-NMR well log,
- wherein the NMR well log comprises a set of NMR measurements comprising T2 distributions, free fluid index (FFI), and bulk volume irreducible (BVI);
- deriving a measured HcPV across the second depth interval based, at least in part, on the set of NMR measurements in the NMR well log;
- calculating the predicted HcPV using the second non-NMR well log and the HcPV prediction method;
- defining a stopping criterion based, at least in part, on a dissimilarity of the measured HcPV and the predicted HcPV;
- calculating a difference between the measured HcPV and the predicted HcPV;
- iteratively, or recursively, while the difference exceeds the stopping criterion:
- adjusting at least one of:
- the SHF, the capillary pressure curve, or the interpreted facies;
- generating an updated HcPV prediction method using the adjusted first set of formation properties;
- re-calculating the predicted HcPV using the second non-NMR well log and the updated HcPV prediction method;
- and
- re-calculating the difference between the measured HcPV and the predicted HcPV;
- generating a calibrated HcPV prediction method based, at least in part, on the predicted HcPV that satisfies the stopping criterion, wherein the calibrated HcPV prediction method comprises a calibrated facies prediction method and a calibrated SHF prediction method;
- receiving a third set of formation properties across a targeted depth interval in a third wellbore penetrating the subsurface region, the third set of formation properties comprising:
- a third plurality of well logs measured by the at least one logging tool, wherein the third plurality of well logs comprises a third non-NMR well log;
- predicting a calibrated facies of the third wellbore at the targeted depth interval using the third plurality of well logs and the calibrated facies prediction method;
- updating a geological model based, at least in part, on the calibrated facies;
- identifying, using the calibrated facies, an identified drilling target within the subsurface region,
- wherein the identified drilling target corresponds to an advantageous location to penetrate the subsurface region due to an expected preferred fluid flow amount indicated by the calibrated facies;
- and
- outputting control instructions to a wellbore drilling system to control the wellbore drilling system to drill a wellbore that intersects the identified drilling target.