Digital Core

Special Core Analysis

  • MICP and pore size distribution (Pore Morphology Model)
  • Steady and unsteady-state relative permeability (LBM)
  • Initial water saturation and residual oil saturation

Special Core Analysis

Comparison Between Digital Core and Lab Results

Two USS kr laboratory measurements were conducted. Digital core evaluation of kr is within 15% error.

Special Core Analysis

Effect of IFT Reduction

Special Core Analysis

Effect of Wettability on Phase Distribution

Digital Core can visualize and quantify the percentage of water/oil coverage on the rock, as well as the residual oil occurrence

Special Core Analysis

Formation Damage Evaluation

Porosity/permeability curve, pore throat distribution etc. can be calculated before and after immersing in various frac fluids and shut-in time:

Before immersing:

  • Average pore radius: 1.65 µm
  • Average pore throat: 1.05 µm

After immersing:

  • Average pore radius: 1.38 µm
  • Average pore throat: 0.78 µm

Special Core Analysis

Identification of Clay Minerals

  • Pores, rock, and clay mineral can be identified through micro-CT and XRF
  • Wettability can be assigned to different minerals: quartz as water-wet, and clay as oil-wet
  • Sensitivity study can be analyzed via various contact angle

Special Core Analysis

Coreflood + Real-Time Micro-CT

Special Core Analysis

  • T < 250 F,P < 3500 psi
  • Micro-plug diameter can be 0.4 and 1 inch

Special Core Analysis

Special Core Analysis

Waterflood or EOR (ASP, polymer, CO2, etc.) can be conducted w/ micro-CT scanning at different PV to observe the oil/water distribution