Table 2 Description of NMR workflows designed for mapping BVI, FFI, and hcs.

A: FFI workflow

Preserve native BVI & FFI

Minimize clay swelling

Assess total porosity

1. T₂ as-is core

2. T₂ decane-saturated core

3. T₂ dried core

Whole core plugs (10 pcs.)

B: BVI workflow

Identify T₁–T₂ of CBW & BVI

Evaluate porosity changes after drying and decane saturation

1. T₂ as-is core

2. Centrifuge to irreducible saturation

4. T₂ dried core

5. T₂ decane-saturated

Whole core plugs (10 pcs.)

C: Supplementary workflow

Support core plug analysis with lithotype classification and OM analysis

Establish correlations with Rock-Eval pyrolysis and XRF/XRD

1. Perform Rock-Eval pyrolysis

2. XRD analysis

Core fragments (15 pcs.)