Determining petrophysical properties of reservoir rocks by image analysis
The objective of this work is to study pore structures and develop methods for computerized petrographic image analysis to quantify the relationships between pore parameters and petrophysical properties of rocks. Petrographic image analysis (PIA) offers a relatively new technique for measurements of shapes, surface areas, and size distributions of rock pores and size/shape of rock grains. We have developed a methodology for measuring each of these petrophysical features using commercially available equipment. This information can be used to describe porosity and lithologic heterogeneities within a reservoir. Permeability is a function of the three-dimensional pore network in a rock and cannot be measured directly from two-dimensional PIA data. However, rock parameters, such as porosity and specific surface values, can be measured by PIA. We have used the Carman-Kozeny model for flow-through porous media to estimate permeability using PIA data for porosity and specific surface. This report describes the equipment and software necessary for image analyses, the application of image data to measurements of rock properties, and the initial correlation of image analysis data to petrophysical properties. 4 refs., 7 figs., 5 tabs.
- Research Organization:
- National Inst. for Petroleum and Energy Research, Bartlesville, OK (USA)
- DOE Contract Number:
- FC22-83FE60149
- OSTI ID:
- 6333740
- Report Number(s):
- NIPER-378; ON: DE89000734
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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