Page 65 - Reservoir Formation Damage
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Chapter 3
Petrography and
Texture of Petroleum'
Bearing Formations
Summary
A review of petrographical characterization of petroleum-bearing
formations, critical for formation damage analysis, is presented.
Introduction
In-situ fluids and particles transport processes occur in the pore space
of the subsurface formations. The subsurface formations can be classified
as following (Collins, 1961; Kaviany, 1991):
1. Isotropic, anisotropic (directional dependency)
2. Homogeneous, heterogeneous (spatial dependency)
3. Consolidated, unconsolidated (cementation)
4. Single or multiple porosity, naturally fractured, nonfractured (pore
structure)
5. Ordered or disordered (random)
Description of petroleum bearing formations by quantitative means is a
difficult task and is presented in this chapter.
Petrographical Characteristics
The petrographical parameters are facilitated to quantitatively describe
the texture or appearance of the rock minerals and the pore structure. The
fundamental parameters used for this purpose are described in the following.
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