Page 11 - Petrophysics 2E
P. 11

Nomenclature, 550
                           Subscripts, 550
                           Greek Symbols, 551
                       References, 551

                   CHAPTER  9
                                                                        a  a  a  a  a  a  554
                    Effect of Stress on Reservoir Rock Properties  a  a  a
                       Static Stress-Strain Relation, 555
                           Stress Analysis, 556
                           Strain Analysis, 559
                           Two-Dimensional Stress-Strain Systems, 560
                       Rock Deformation, 561
                           Hooke’s Law, 562
                            Stressstrain Diagrams, 571
                           The Mohr Diagram, 574
                            Dynamic Elastic Properties, 577
                        Rock Strength and Hardness, 580
                            Rock Hardness, 584
                        Compressibility of Porous Rocks, 586
                            Pore Compressibility, 586
                            Effectiveness of Pore Pressure in Countering Stress, 591
                            Effect of Pore Compressibility on Reserves Calculations, 594
                            Converting Lab Data to Reservoir Data, 596
                        Effect of  Stress on Core Data, 599
                            Effect of Stress on Porosity, 600
                            Effect of Stress on Permeability, 603
                            Effect of Stress on Resistivity, 604
                        Porosity-Permeability-Stress Relationship, 606
                        Effect of Stress on Fracturing, 62 1
                            Effect of Poisson’s Ratio on Fracture Gradient, 621
                            FG for Offshore Wells, 626
                            Effect of Poisson’s Ratio on Fracture Dimensions, 632
                        In-Situ Stress Distribution, 637
                        Effect of Stress Change on Rock Failure, 643
                            Change in Stress Field Due to Depletion and Repressurization, 644
                            Stress Relationship at the Wellbore, 645
                            Estimating Critical Borehole Pressure in Vertical Wells, 646
                            Critical Borehole Pressure in Horizontal Wells, 647
                            Critical Pore Pressure, 649
                            Example of a North Sea Reservoir, 650
                            Porosity as Strength Indicator to Evaluate Sand Production, 653
                        Problems, 659
                        Nomenclature, 664
                            Subscripts, 664
                            Greek Symbols, 665
                        References. 666


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