Methods and systems for grain density and porosity determination for planned wells

A system for updating a well plan for a planned well, using a hyperspectral image of a well core obtained from the planned well, the system comprising:

• a computer configured to:
• determine a distribution of mineral abundances for a plurality of minerals across the well core using the hyperspectral image;
• determine an image-derived distribution of grain density from the distribution of mineral abundances;
• calibrate the image-derived distribution of grain density to obtain a calibrated distribution of grain density;
• determine a vertical profile of grain density across the well core using the calibrated distribution of grain density;
• and
• determine a total porosity of the planned well using the vertical profile of grain density;
• and
• a well planning system configured to update a portion of the planned well based on the total porosity.

A non-transitory computer-readable memory comprising computer-executable instructions stored thereon that, when executed on a processor, cause the processor to update a well plan for a planned well, using a hyperspectral image of a well core obtained from the planned well, by performing:

• determining a distribution of mineral abundances for a plurality of minerals across the well core using the hyperspectral image;
• determining an image-derived distribution of grain density from the distribution of mineral abundances;
• calibrating the image-derived distribution of grain density to obtain a calibrated distribution of grain density;
• determining a vertical profile of grain density across the well core using the calibrated distribution of grain density;
• determining a total porosity of the planned well using the vertical profile of grain density;
• and
• updating, using a well planning system, a portion of the planned well based on the total porosity.