Hydraulic Fracturing and Rock Mechanics.

• Author: Zhao, Yu.
• TeilnehmendeR: Zhang, Yongfa.; He, Pengfei.
• Place / Publishing House: Singapore : : Springer Singapore Pte. Limited,, 2023.; ©2023.
• Year of Publication: 2023
• Edition: 1st ed.
• Language: English
• Physical Description: 1 online resource (269 pages)

Table of Contents

Intro -- Preface -- Acknowledgements -- Contents -- 1 Introduction -- 1.1 Background -- 1.2 Research Progress -- 1.2.1 Initiation and Propagation of Hydraulic Fracture in Shale Reservoirs -- 1.2.2 Model of the Intersection of Hydraulic and Natural Fracture -- 1.2.3 Formation Mechanism of the Complicated Crack Network of Shale -- 1.2.4 Existing Problems -- References -- Part I Theoretical Background -- 2 Rock Mechanics in Hydraulic Fracturing Operations -- 2.1 Stress -- 2.2 Stain -- 2.3 Linear Elastic Material and Its Failure -- 2.4 Pressurized Crack -- References -- Part II Laboratory Observation -- 3 Reservoir Characteristics -- 3.1 Introduction -- 3.2 Sample Preparation -- 3.2.1 Sampling Location -- 3.2.2 Mineral Composition Characteristics -- 3.2.3 Microstructural Characteristics -- 3.3 Determination of the Physical and Mechanical Parameters of Shale -- 3.3.1 Porosity -- 3.3.2 Permeability -- 3.3.3 Basic Mechanical Properties of Longmaxi Shale -- 3.4 Uniaxial Hydraulic Fracturing Characteristics -- 3.4.1 Experimental Set-Up -- 3.4.2 Experimental Procedures -- 3.4.3 Experiment Results and Analysis -- 3.5 Characteristics of True Triaxial Hydraulic Fracture -- 3.5.1 Sample Preparation and Test Equipment -- 3.5.2 Fracturing Scheme -- 3.5.3 Analysis of Fracturing Results -- References -- 4 Constant Flow Injection -- 4.1 Introduction -- 4.2 Instantaneous Fracturing Mechanism of Constant Flow Pressurization -- 4.2.1 Impact of Axial Load -- 4.2.2 Effect of Injection Rate -- References -- 5 Constant Pressure Injection -- 5.1 Introduction -- 5.2 Results and Analysis -- 5.2.1 Typical Curves of Pump Pressure and Injection Rate Versus Time -- 5.2.2 New Insights from Observing Hydraulic Fracture Morphology -- 5.3 Correlation Between Fracture Behavior and Pumping Parameters Based on Engineering Parameters.

5.4 Characterization of the Relationship Between Fracture Propagation and Pumping Parameters -- References -- Part III Theoretical Modelling Considering Non-uniform Fluid Pressure -- 6 Fracture Initiation -- 6.1 Breakdown Process Under Constant Injection Flow -- 6.2 Breakdown Process Under Constant Injection Pressure -- References -- 7 Fracture Propagation -- 7.1 Introduction -- 7.2 Mathematical Formulation -- 7.2.1 Nonuniform Fluid Pressure Consideration -- 7.2.2 Semianalytical Solution -- 7.2.3 Propagation Conditions Under Nonuniform Fluid Pressure -- 7.3 Validation of the Semianalytical Solution -- 7.3.1 Degradation from Nonuniform Pressure to Constant Pressure -- 7.3.2 Stress Distribution -- 7.3.3 Critical Propagation Condition -- 7.4 Parametric Sensitivity Analysis -- 7.4.1 Reliability Analysis of the Numerical Solution (Perturbation of the Number of Subintervals m) -- 7.4.2 Sensitivity Analysis of the Initial Fluid Pressure P0 and Crack Length a -- 7.4.3 Perturbation Analysis of the Number of Terms n -- Appendix 1. ξ-Integrals Function -- Appendix 2. Closed-Form of F(ξ) -- References -- 8 Fracture Interaction Behaviors -- 8.1 Introduction -- 8.2 Intersection Model Between Hydraulic Fracture and Natural Fracture -- 8.2.1 Solution of Net Pressure Inside the Toughness-Dominated HF -- 8.2.2 Slippage Condition for the NF -- 8.3 Validation of Composite Criterion -- 8.3.1 Comparison with Previous Intersection Criteria -- 8.3.2 Comparison with Laboratory Experiments -- 8.4 Composite Criterion Considering Nonuniform Fluid Pressure -- 8.4.1 Nonuniform Form of Fluid Pressure -- 8.4.2 Comparison with Laboratory Experiments -- 8.5 Perturbation Analysis of Key Parameters -- 8.5.1 Impact of Initial Horizontal In-Situ Stress -- 8.5.2 Impact of Fracture Toughness -- 8.5.3 Impact of Approaching Distance -- References -- Part IV Field Implication.

9 Formation of Complex Networks -- 9.1 Introduction -- 9.2 Effect of Bedding Anisotropy on Hydraulic Fracturing -- 9.2.1 Pump Pressure and Deformation -- 9.2.2 Acoustic Emission Response of Microfracture -- 9.2.3 Hydraulic Fracture Morphology -- 9.3 Effect of Different In-Situ Stress States and Wellbore Orientations on the Formation Mechanism of Complex Fracture Networks -- 9.3.1 Characteristics of Fluid Pressure and Deformation -- 9.3.2 Hydraulic Fracture Propagation Modes -- 9.3.3 Quantitative Evaluation of Fracture Morphology -- 9.3.4 Effects of Bedding Planes -- 9.3.5 Effects of In-Situ Stress -- 9.3.6 Effects of Wellbore Orientations -- References -- Epilogue -- Main Insights -- Implications for Future Study.