Page 12 - Petrophysics

CHAPTER 10
Fluid-Rock Interactions . . . . . . . . . . . . . . . . . . . . . 671
Importance of Near-Wellbore Permeability, 67 1
Nature of Permeability Damage, 674
Origin of Permeability Damage, 675
Types of Permeability Damage, 677
Effect of Fines Migration on Permeability, 685
Types and Sizes of Fines, 686
Fines Migration, 695
Migration of Foreign Solids, 709
Critical Velocity Concept, 709
Entrainment and Surface Deposition, 710
Entrainment and Plugging, 714
Identification of Permeability Damage Mechanisms, 7 19
Permeability Damage from Foreign Solids, 720
Permeability Damage from Formation Fines, 726
Effect of Water Quality on Permeability, 73 1
External Filter Cake Buildup, 734
Internal Filter Cake Buildup, 736
Injectivity Decline from Plugging of Perforations, 740
Impairment from Wellbore Fillup, 742
Membrane Filtration Tests, 744
Core Filtration Tests, 747
Problems, 756
Nomenclature, 757
Subscripts, 758
Symbols, 758
References, 759

APPENDIX
Measurement of Rock and Fluid Properties . . . . . . .763

EXPERIMENT 1
Fluid Content of Rocks by the Retort Method. . . . . . . 764
Introduction, 764
Equipment and Procedures, 765
Equipment, 765
Retort Specimen, 765
Retort Calibration, 766
Retorting, 766
Sample Calculations, 766
Retort Calibration, 766
Results from the Test Specimen, 767
Saturation Calculations, 767
Questions and Problems, 767
References, 768

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