Page 122 - Reservoir Formation Damage

Characterization of Reservoir Rock 105

uncertainties and define reservoir spatial variability." Skopec (1992) adds
that "Rock characterization is one component in the reservoir charac-
terization scheme." Figure 6-2 by Skopec (1992) describes the multi-
disciplinary effort necessary for rock characterization. The overall process
of petrophysical integration is described in Figure 6-3 by Gunter et al.
(1997). As explained in Figure 6-3, the petrophysical integration tasks
can be grouped into three stages: (1) characterization of the rock and pore
types, and the fluids and the flow functions, (2) construction of a petro-
physical model, and (3) testing of the reservoir description by various
approaches. Typical instrumental techniques used for characterization of
core samples are described in the following.

BASIC CORE
ANALYSIS
• Fluid Saturation
• Porosity
• Permeability
WELLSITE GEOLOGICAL
ACTIVITIES TESTING
• Petrography
• coring • Compositional
• Cora Handling and Analysis
Preservation • Sedlmentology
• Wellsite Core Testing

SPECIAL CORE ANALYSIS

PETROPHYSICAL RESERVOIR
EVALUATION ENGINEERING
• Core-Log Correlation • Centrifuge Technology
• Electrical, Sonic, and • Capillary Pressure
Nuclear Properties • Relative Permeability
• Model Development • Wettability
• Pore Volume Compressibility

DRILLING/COMPLETION
ENGINEERING
• Formation Damage
• Rock Mechanics

Figure 6-2. Elements of the integrated rock characterization (after Skopec,
©1992; reprinted by permission of SPWLA).