Proceedings of the International Field Exploration and Development Conference 2023: Vol. 8 (Springer Series in Geomechanics and Geoengineering)

Contents Enhanced Oil Recovery for Oil and Gas Reservoirs Development Regularity and Influencing Factors of Horizontal Wells in Tight Conglomerate Reservoir 1 Introduction 2 Analysis of Oil Well Productivity Law 3 Analysis of Geological Factors Affecting Development Law 3.1 Reservoir Classification, Characteristics and Distribution 3.2 Analysis of Geological Factors Based on Grey Correlation Degree 3.3 Major Geological Factors Are Identified 4 Analysis of Development and Engineering Factors Affecting Development Law 4.1 The Influence of Engineering Factors on Development Law is Analyzed 4.2 Analysis of the Influence of Development Factors on Development Law 5 Multi-factor Analysis of Development Law 6 Conclusion and Understanding References Physical Experimental Study on the Development Characteristics of Steam Chambers in Horizontal Wells of Offshore Thin Layer Heavy Oil Reservoirs During Steam Flooding 1 Introduction 2 Scheme Design 3 The Impact of Different Well Spacing on Output Characteristics 4 The Influence of Different Well Spacing on the Development Characteristics of Steam Chambers 5 Conclusions References Unstable Pressure Analysis of Gas Drive in Low Permeability Carbonate Reservoirs 1 Introduction 2 Well Test Model 3 Sensitivity Analysis 4 Conclusions References High-Efficiency Development of Shallow Ordinary Heavy Oil Reservoir Utilizing Small Well Spacing Steam Thermal Method 1 Introduction 2 Brief of Geology and Development 3 Determination of Reasonable Well Pattern and Spacing 3.1 Numerical Simulation Method 3.2 Reservoir Engineering Method 3.3 Empirical Formula Method 4 Optimization of Reasonable Injection and Extraction Parameters 5 Effect in Oilfield Practice 6 Conclusion References A Method for Evaluating the Suitability of CO2 Injection in Oil Reservoirs Based on Multi-model Coupled Machine Learning Algorithm 1 Introduction 2 Model Preprocessing and Construction 2.1 Establishment of Datasets and Data Preprocessing 2.2 Model Building 3 Results and Discussion 3.1 Comparison of Reservoir Screening Models 3.2 Reservoir Selection Process Based on the Hybrid Model 3.3 Verification of Reservoir Screening Case Based on Hybrid Model 4 Conclusion References Study on the Mechanism of Nanomaterials in Improving Oil Recovery in Unconventional Reservoirs 1 Introduction 2 Characteristics of Unconventional Reservoirs and Nanoscale 2.1 Characteristics of Unconventional Reservoirs 2.2 Characteristics of Nanomaterials 3 Mechanism of Enhanced Oil Recovery by Nanomaterials 4 Conclusion References Study on Injection Limit of Polymer Flooding in Ordinary Heavy Oil Reservoirs 1 Introduction 2 Reservoir Overview and Polymer Flooding Implementation 3 Study on Influencing Factors of Polymer Flooding 3.1 Polymer Injection Volume 3.2 Polymer Solution Concentration 3.3 Injection Rate 3.4 Number of Polymer Slugs 3.5 Interval Time Between Polymer Injection Slugs 3.6 Polymer Solution Concentration of Subsequent Slugs 3.7 Simultaneous Polymer Injection of Multiple Wells and Single-Well Polymer Injection 4 Conclusions References Blockage Types of Gas Well and Technical Countermeasures for De-Plugging in Low-Permeability Tight Gas Reservoirs 1 Introduction 2 Gas Area Production 3 Types of Blockages of Gas Well 3.1 Blockage of Corrosion and Scaling 3.2 Blockage of Sand Production and Accumulation 3.3 Water Lock Damage of Reservoirs 4 Gas Well De-Plugging Technology 4.1 Descaling and Unblocking Technology in Wellbores and Near-Well Reservoirs 4.2 Wellbore Coiled Tubing Sand Flushing Technology 4.3 Reservoir Hydrolysis Lock Technology 5 Conclusions References Optimization of Staged Fracturing Parameters of Horizontal Well in Typical Block of Sulige Tight Gas Reservoir 1 Introduction 2 Fracture Orientation 3 Optimization of Fracture Parameters 3.1 Optimization of the Number of Fracturing Stages 3.2 Optimization of Fracture Length 3.3 Optimization of Fracture Conductivity 4 Field Examples 5 Conclusion References Experimental Evaluation of the Succession Sequence During Commingled Production in a Tight Gas Reservoir 1 Introduction 2 Experimental 2.1 Materials 2.2 Experimental Setup 2.3 Experimental Procedures 3 Results and Discution 3.1 Single-Layer Production 3.2 Commingled Production Sequence and Timing 3.3 Direct Commingled Production 3.4 Core Parameters Quantitative Analysis 4 Conclusion References Distribution and Potential Exploitation Strategy of Remaining Oil in Offshore High Porosity and High Permeability Thin Oil Formation 1 Introduction 2 Reservoir Profile 3 Remaining Oil Distribution Law 3.1 Historical Fit Simulation 3.2 Current Production Status 3.3 Remaining Oil Distribution Law 4 Potential Exploitation Strategy 4.1 No Adjustment Well Pattern SchemeOptimization Simulation of Injection-Production Parameters 4.2 No Adjustment Well Pattern Scheme 5 Conclusion References Numerical Simulation of Hydrogen Production from In-Situ Combustion of Gas Reservoirs 1 Introduction 2 Approach and Methodology 3 Simulation and Model 3.1 Gridding Overview 4 Results and Discussion 4.1 Injectability and Reaction Position Simulation Results 4.2 Influencing Factors on In-Situ Hydrogen Production from Gas Reservoir Combustion 5 Conclusion References Synthesis and Application of High Temperature Resistant Solid Acid Based on Polymer Coating 1 Background 2 Synthesis of Solid Acid 2.1 Synthesis and Optimization of Solid Acid Capsule Core Materials 2.2 Optimization of Capsule Wall Materials 2.3 Synthesis of Solid Acid Samples 3 Evaluation of High-Temperature Dissolution Performance of Solid Acids 4 Evaluation of Solid Acid Corrosion Ability 5 Evaluation of Solid Acid Gel Breaking Ability 6 Evaluation of Acid Rock Reaction Capacity 7 Field Application 8 Conclusions References Optimization Study of Conversion Timing for Secondary Development & Tertiary Recovery in the Ultra-High-Water-Cut Oilfield Based on Multi-factor Decision-Making 1 Introduction 2 Analysis of Influencing Factors of ‘2nd+3rd’ Conversion Timing 3 Optimization Technology of ‘2nd+3rd’ Conversion Timing 3.1 Optimization of Drive Medium Conversion Timing Based on Enhanced Recovery Rate 3.2 Optimization of Drive Medium Conversion Timing Based on Enhanced Economic Benefits 3.3 Optimization of Drive Medium Conversion Timing Based on Well Network Lifecycle 3.4 Optimization Chart of Drive Medium Conversion Timing Based on Multi-factor Decision-Making 4 Conclusions References Study of nano-SiO2 Strengthened High-Molecular-Weight Polymer Gel for Plugging Steam Channeling 1 Introduction 2 Experimental Section 2.1 Experimental Materials and Instrumentation 2.2 Experimental Method 3 Results and Discussion 3.1 Construction of Gel Formulation Application Performance Evaluation of Gel 3.2 Performance Evaluation of Gel 4 Conclusion References Microfluidic Investigation on the Microscopic Mechanism of Gas Injection for Enhanced Oil Recovery in Deep Reservoirs 1 Introduction 2 Methods and Materials 2.1 Experimental Materials and Devices 2.2 Experimental Procedure 3 Results and Discussion 3.1 Distribution Characteristics of Microscopic Remaining Oil During Gas Injection After Water Flooding 3.2 Microscope Displacement Mechanism of Gas Injection After Water Flooding 3.3 Gas Injection After Water Flooding in Heterogeneous Reservoirs Improves Micro Displacement Efficiency 4 Conclusion References Evaluation of Steam Conformance and Vapor-Liquid Interface with Multi-lateral Horizontal Well in SAGD Operation 1 Introduction 1.1 A Subsection Sample 2 Calculation Method for Steam Conformance of Multi-lateral Wells 2.1 Modified AVE Method 2.2 TOF Method 2.3 Steam Conformance for Opening Well 2.4 Steam Conformance for Closing Well 3 Results and Recommendation 3.1 Steam Judgment of Long Horizontal Section 3.2 Steam Judgment of the Laterals in a Multi-lateral Well 3.3 Analysis of Steam Conformance of Multi-lateral Wells 3.4 Vapor-Liquid Interface of Multi-lateral Wells 4 Conclusion References Study on the Technology of High Efficiency Chemical Flooding to Improve Recovery of Low Permeability Reservoir 1 Introduction 2 Characteristics of Three Types of Oil Reservoirs 2.1 Development Characteristics of Oil Layers 2.2 Reservoir Physical Properties 2.3 Differences from Class I Oil Layers 3 Timization of Three Types of Reservoir Flooding Systems 3.1 Single System 3.2 Composite System 4 Field Trial Application 4.1 Enhanced Oil Recovery During Polymer Flooding Phase is Higher Than that of Conventional Polymer Flooding 4.2 Polymer Surfactant Flooding Has a 29% Lower Cost Per Ton of Oil Than Conventional Polymer Flooding 5 Conclusion References Determination and Application of Reasonable Liquid Production at Different Water Cut Stages of Sandstone Reservoirs in South America 1 Introduction 2 Overview of Target Reservoir 2.1 Geological Characteristics 2.2 Production Characteristics 3 Dimensionless Liquid Production Index and Liquid Raising Multiple 3.1 Calculation of Dimensionless Liquid Production Index 3.2 Actual Liquid Raising Multiple 3.3 Effect of Liquid Raising 4 Conclusions References Study on CO2 Flooding Effect of Heterogeneous Reservoir Under Different Well Pattern 1 Introduction 2 Simulation Model Description 3 Results and Discussion 3.1 Effect of Different Well Patterns on CO2 Flooding Under Homogeneous Reservoir Conditions 3.2 Effect of Different Well Patterns on CO2 Flooding Under Heterogeneous Reservoir Conditions 4 Conclusion References Research of CO2 Huff and Puff Technology Applied to Horizontal Well Energy Replenishment in Tight Oil Reservoirs of A Area 1 Introduction 2 Geological Overview and Development Status of the Experimental Area 3 Pilot Testing and Feasibility Analysis 3.1 Analysis of CO2 Throughput Mechanism 3.2 Miscibility Test 3.3 Gas Injection Parameter Design 3.4 Pilot Test Effect 4 Technical Parameter Optimization 4.1 Establish the Principle of Selecting Wells for Secondary Testing 4.2 Optimization of Injection and Mining Parameters 4.3 Application Effect References The Establishment of Method to Determine Phase Inversion Point of Crude Emulsion in Micro 1 Introduction 2 Establishment of RN Method 3 Experimental 3.1 Materials and Equipment 3.2 Emulsion Preparation 3.3 Viscosity 3.4 Actual Water Cut 3.5 Diameter and Quantity of Emulsion 4 Results and Discussion 4.1 The Viscosity-Temperature Curve and Rheological Curve of Oil 4.2 Phase Inversion Point of Emulsion in Macroscopic Scale 4.3 Size Distribution of Emulsion 4.4 The Phase Inversion Points of Emulsion in Micrograph 5 Conclusions References Research and Application of Efficiency Improvement for P612 Steam Flooding 1 Introduction 2 The Development of Steam Flooding 2.1 Experimental Design 2.2 Experimental Results 3 Scale of Steam Flooding Channel 4 Improving Steam Flooding Efficiency 4.1 Adjustment of Injection and Production Parameters 4.2 Chemical System Plugging 5 Application 6 Conclusion References Microbial Foaming Agent Promoting Gas Field Recovery Efficiency 1 Introduction 2 Influence Factors of Conventional Chemical Foaming Agent 3 Technical Principle of Improve Gas Recovery with Microbial Foaming Agent 3.1 Mechanism of Microbial Foaming Agent 4 Laboratory Experimental Study on Microbial Foaming Agent 4.1 Selection of Microbial Communities 4.2 Contrast Experiment of Microbial Foaming Agent and Conventional Chemical Foaming Agent 4.3 Experiment on the Influence Factors of Microbial Foaming Agent 5 Field Test Effect Evaluation 6 Conclusions and Suggestions References Experimental Study on Improving Tight Oil Recovery by Injecting Natural Gas 1 Introduction 2 Calculation of Gas Minimum Miscible Pressure 3 Test Materials and Test Methods 3.1 Test Materials 3.2 Test Methods 4 Long Core Flooding Test 4.1 Production Characteristics of Long-Core Flooding 4.2 Optimization of Gas Injection 4.3 Optimization of Injection Time 5 Conclusions References Experimental Study on Enhanced Oil Recovery by Microbial Chemical Flooding in High Pour Point Oil Reservoir 1 Introduction 2 Experimental Conditions 2.1 Geological Overview 2.2 Experimental Materials 2.3 Experimental Methods 3 Experimental Results and Analysis 3.1 Analysis of Crude Oil Properties 3.2 Research on Microbial Chemical Composite Flooding Formula System 4 Conclusions References Research on the Mechanism and Technical Limits of Huff and Puff in Natural Water Drive Reservoir 1 Introduction 2 Research on the Oil-Increasing Mechanism of Huff and Puff 2.1 Laboratory Experiments Method 2.2 Numerical Simulation Method 3 Research on the Technical Limits of Huff and Puff 3.1 Oil saturation Limits 3.2 Dimensionless Technical Limits 4 Results of Field Application 5 Conclusions References Formation Scaling Characteristics During Waterflooding Development in Gaskule Oilfield 1 Introduction 2 Experimental Methods 2.1 Method on Formation Water Compatibility 2.2 Experimental Method of Long Core Scaling 3 Experimental Results and Analysis 3.1 Formation Water Compatibility 3.2 Experimental Results of Long Core Scaling 4 Conclusion References Study on Amphiphilic Polymer for Salt Thickening and Emulsification in High Salt Heavy Oil Reservoir 1 Introduction 2 Material and Method 2.1 Material 2.2 Synthesis of Salt Thickening Amphiphilic Polymer (PADtC) 2.3 1H NMR 2.4 Sample Preparation 2.5 Viscosity 2.6 Viscoelasticity 2.7 Viscosity Reduction Measurement 2.8 Microscopic Observation 3 Results and Discussions 3.1 Characteristic of PADtC 3.2 The CAC of the PADtC 3.3 Property of Salt Thickening 3.4 Viscosity Reduction of Heavy Oil by PADtC 4 Conclusion References Characterization of CO2 Huff-n-puff Recovery from Dual Horizontal Wells in Shale Matrix-Fractured Reservoirs 1 Introduction 2 Methods 2.1 Experimental Device 2.2 Experimental Model 2.3 Experimental Procedures 3 Results and Discussion 3.1 Effect of Fractures on Soaking Well Pressure 3.2 Effect of Fractures on Pressure Field Distribution 3.3 Evaluation of CO2 Huff-n-puff Oil Recovery Factor Effect 4 Conclusion References Design of Unconsolidated Sandstone Tip Screen-Out Fracturing Under the Actor of Proppant Complication 1 Introduction 2 Calculation Model 3 Design of Construction Parameters of Tip Screen Out Fracturing 3.1 Calculate Filter Loss 3.2 Fracturing Process Parameters Calculation 4 Field Application 5 Conclusions References Physical Simulation Study on Horizontal Well Injection and Production in Ultra-low Permeability Reservoirs 1 Introduction 2 Physical Simulation Experiment 2.1 Effect of Different Displacement Media on Development Effect 2.2 The Influence of Different Dynamic and Static Parameters on the Development Effect 3 Conclusion References Research and Application of High Efficiency Lifting Technology of Gas Detection Wells of CO2 Flooding 1 Introduction 2 Laboratory Test Study 2.1 The Multistage Gravity Separation Gas Anchor and the Multifunctional Integrated Gas Anchor 2.2 The Multifunctional Integrated Gas Anchor with Different Structures 2.3 Gas-Liquid Separation Anti-air Pump 3 Field Application Effect 3.1 The Multistage Gravity Separation Gas Anchor and the Multifunctional Integrated Gas Anchor 3.2 The Multifunctional Integrated Gas Anchor with Different Structures 3.3 Gas-Liquid Separation Anti-Air Pump 4 Conclusion References Study on Causes and Prevention Measures of Casing Damage in CO2 Test Area of X Oilfield 1 Introduction 2 Cause Analysis of Casing Damage 2.1 Appearance and Form 2.2 Laboratory Experiment 3 The Laws of H2S Corrosion 3.1 Water Injection is Followed by Gas Injection, and the Injection Well is Stopped at the Gas Injection Stage 3.2 Gas Injection is Followed by Water Injection, and the Injection Well is Stopped at the Water Injection Stage 3.3 Field Condition 4 Prevention Measures of Casing Damage 4.1 The Template of Casing Damage Risk Assessment 4.2 Preventive Measures for Casing Damage 5 Conclusion References Study on Optimization Design of Hydraulic Fracturing Construction Parameters for Vertical Wells in Low-Permeability Reservoirs 1 Introduction 2 Geological Overview of the Block 3 Numerical Model Setup 4 Influence of Construction Parameters on Interaction Propagation of Artificial Fractures and Natural Fractures 4.1 Influence of Displacement 4.2 Influence of Pad Fluid Ratio 5 Optimization of Construction Parameters 5.1 Optimization of Pad Fluid Ratio 5.2 Optimization of Displacement 5.3 Optimization of Sand Ratio 6 Field Test 7 Conclusions References Study on Deep Profile Control and Flooding Enhanced Oil Recovery Technology of Chromium Ion Gel in Fractured Low-Permeability Reservoir 1 Preface 2 Deep Profile Control and Flooding Mechanism and Indoor Experiments 2.1 Evaluation of Core Sealing and Oil Displacement Experiment After Sealing 2.2 Microscopic Experimental Evaluation of Oil Displacement After Plugging with Profile Control and Flooding Agents 2.3 The Numerical Simulation Results Show that the Deep Profile Control and Flooding of Chromium Ion Gel System Can Achieve Good Results 3 Formula Optimization, Performance Evaluation and Reasonable Parameter Determination of Deep Profile Control and Flooding Agent for Chromium Ion Gel System 3.1 Optimization of Profile Control and Displacement Agent Formula 3.2 Polymer Concentration Optimization 3.3 Optimization of Crosslinking Ratio 3.4 Optimization of Additive Concentration 3.5 Performance Evaluation of Profile Control and Flooding Agents 3.6 Determination of Reasonable Parameters for Deep Profile Control and Flooding 4 Principles for Selecting Wells and Layers for Deep Profile Control and Flooding 4.1 Principles of Well Selection 4.2 Layer Selection Principle 5 Application of Deep Profile Control and Flooding Enhanced Oil Recovery Technology of Chromium Ion Gel in Fractured Low-Permeability Reservoir 5.1 Overview of Chromium Ion Gel Deep Profile Control and Flooding Well Area 5.2 Achieved Results 6 Conclusion References Method for Improving Volumetric Sweep Efficiency of Thick Massive Carbonate Reservoir Under Influence of Gravity Differentiation 1 Preface 2 Stability of Water Flood Front in Massive Reservoirs 3 Optimization of Water Injection Methods for Homogeneous Thick Massive Reservoirs 3.1 Determination of Gravity Differentiation Degree 3.2 Analysis of the Impact of Injector Perforation on the Performance of Water Injection Development 4 Conclusions References Research and Application of Backflow Law of Longdong Tight Shale Oil Proppant 1 Introduction 2 Evaluation of Proppant Reflux Experiment 2.1 Experimental Instruments 2.2 Experimental Methods 2.3 Protocol 2.4 Experimental Results and Analysis 2.5 0.4% Fiber Anti Proppant Backflow Experimental Plan 2.6 Experimental Results and Analysis of Fiber Anti Proppant Backflow 3 Field Application 4 Conclusion References Analysis of Water-Flooding Development Potential for Tight Reservoir in the Ordos Basin 1 Introduction 2 Theoretical Derivation of Ultimate Permeability 2.1 Calculation of Ultimate Imbibition Permeability 2.2 Calculation of Ultimate Displacement Permeability 2.3 Calculation of Ultimate Displacement Development Permeability 3 Theoretical Derivation of Ultimate Permeability 3.1 Ultimate Permeability Calculations for Tight Reservoirs 3.2 Tight Reservoir Development Method 3.3 Tight Reservoir Development Potential 4 Conclusions References Quantitative Characterization Method for Interwell Connectivity Change Based on Improved Capacitance-Resistance Model 1 Introduction 2 The Improvement of Capacitance-Resistance Model 2.1 The Capacitance-Resistance Model and Existing Problems 2.2 The Improvement of Capacitance-Resistance Model 3 Study on the Reasons of Oil Well Low Efficiency 3.1 Study on the Mechanism of Oil Well Low Efficiency 3.2 Identification and Treatment of Low Efficiency Oil Wells 4 Application in Oil Fields 4.1 Cause Analysis of Low Efficiency Oil Wells in BZ Oilfield 4.2 Treatment of Low Efficiency Wells in BZ Oilfield 5 Conclusions References Influencing Factors and Engineering Parameter Optimization of Fractured Horizontal Well Productivity in Tight Gas Reservoir 1 Introduction 2 Overview of Block Development 3 Analysis of Horizontal Well Productivity Mode 4 Analysis of Factors Affecting Production Capacity and Sensitivity Evaluation 4.1 Numerical Simulation Model 4.2 Parameter Sensitivity Evaluation 5 Engineering Parameter Optimization 6 Conclusion and Understanding References New Material of Composite Chemical Proppant Backflow Prevention 1 Introduction 2 Technical Background 3 Mechanism of Fracturing Sand Control 4 Experimental Process 5 Conclusion References Stimulation Mechanism and Development Method Optimization of CO2 Injection After Water Flooding in Low Permeability Glutenite Reservoir 1 Introduction 2 Regional Geological Summary and Development Status 2.1 Regional Geological Summary 2.2 Development Status 3 CO2 Flooding Mechanism and Laboratory Experiments 3.1 CO2 Flooding Mechanism 3.2 CO2 Displacement Experiment 4 Optimization of Development Methods 4.1 Model Establishment 4.2 Historical Fitting of the Research Area 4.3 Numerical Simulation Study of CO2 Flooding 5 Effect Prediction 6 Summary References Study on Surfactants for Replenish Energy Before Fracturing in Tight Reservoir 1 Introduction 2 Surfactant Optimization 2.1 Experimental Conditions 2.2 Interfacial Tension 2.3 Emulsification 2.4 Imbibition 3 Field Test 3.1 Test Scheme 3.2 Test Effect 4 Conclusion and Understanding References Technology and Application of Multistage Compound Deep Profile Control and Flooding in Ansai Extra-low Permeability Reservoir 1 Introduction 2 Block Profile 3 Multistage Compound Deep Profile Control and Flooding Technology 3.1 Selection of Fracture Plugging Agent 3.2 Multi-particle Size Combination Drive Design 3.3 Injection Quantity and Injection Speed 4 Field Application 4.1 General Situation of Profile Control and Flooding 4.2 Implementation Effect 5 Conclusion and Understanding References Study on Fracturing Time and Quantitative Method of Polymer Flooding 1 Introduction 2 Influencing Factors and Quantification of Chemical Flooding Fracturing Effect 3 Determination and Quantification of Reasonable Timing 4 The Application Effect 5 Conclusion References The Physical Experiment of Displacement in an Offshore Fluvial Heavy Oil Reservoir 1 Introduction 2 Reservoir Physical Properties and Fluid Properties 3 Microscopic Properties of Polymer Microspheres 3.1 Particle Size Distribution of Polymer Microspheres 3.2 Observation of the Morphology of Polymer Microspheres 4 Evaluation of Injectability of Polymer Microspheres 4.1 Plugging Experiment of Polymer Microsphere Sand-Filled Pipe 4.2 Effect of Polymer Microsphere Concentration on Plugging Performance 4.3 Microporous Membrane Experiment 5 Polymer Microsphere EOR Evaluation 5.1 Single Tube Oil Displacement Test 5.2 Three Pipe Parallel Displacement Experiment 6 Performance Evaluation of Polymer and Soft Gel 6.1 Polymer Screening 6.2 Relationship Between Polymer Viscosity and Shear Rate 6.3 Static Adsorption Experiment of Polymer 6.4 Screening of Soft Gel Formulation 6.5 Shear Rheological Properties of Soft Gel 6.6 Shear Resistance of the Soft Gel 7 Soft Gel Plugging Experiment 8 Soft Gel Flooding Test 9 Two-Dimensional Model Experiment 10 Conclusions References Research on Optimal Design of Fracture Parameters for Horizontal Wells Multi-Stage Fracturing in Coalbed Methane Reservoirs 1 Introduction 2 Model Setup 2.1 Block Background 2.2 Simulation Model 3 Fracture Propagation Characteristics 3.1 Cluster Number 3.2 Cluster Spacing 4 Optimization of Fracture Parameters 4.1 Stage Cluster Ratio 4.2 Number of Fracture Stage 4.3 Cluster Spacing 4.4 Fracture Half-Length 5 Field Test 6 Conclusions References Field Test and Understanding of Fire Flooding in Shallow Ordinary Heavy Oil Reservoir of K Oilfield 1 Introduction 2 Overview of Mine Experiment 3 Characteristics of Fire Flooding Effect and Water Production in K Oilfields 3.1 Analysis of Fire Flooding Effect Characteristics 3.2 Water Production Characteristics 4 Analysis of Screening Conditions for Fire Flooding in K Oilfields 4.1 Screening of Oil Layer Thickness 4.2 Screening of Well Spacing for Development 5 Overall Evaluation of Fire Flooding Production Effect in K Oilfields 6 Conclusion References Impact of Surfactant Concentration on Chemical-Assisted Methane Flooding in Foamy Oil Reservoirs 1 Introduction 2 Experiment Section 2.1 Experiment Material 2.2 Experiment Apparatus and Procedure 3 Results and Discussions 3.1 Surfactant Concentration Effect on Oil-Gas Interfacial Tension 3.2 Surfactant Concentration Effect on Foamy Oil Generation and Stability 3.3 Effect of Surfactant Concentration on CAMF Microscopic Flow 4 Conclusion and Suggestion References Research and Field Application of the Second & Tertiary Combined Chemical Flooding Technology in the Multi-Layer Sandstone Reservoir on the Period of High Water Content and High Dispersion 1 Introduction 2 Pilot Project Background 3 Pilot Project Plan 3.1 Subdivide Sand Beds and Quantify Remaining Oil Potential 3.2 Adjust Well Pattern and Smooth Injection and Production Channel 3.3 HPCF Under High Temperature and Salinity Conditions 4 Filed Application of HPCF System 5 Conclusion References Preparation and EOR Mechanism of Microemulsion 1 Introduction 2 Materials and Methods 2.1 Experimental Materials 2.2 Experimental Equipment 2.3 Quasi-Ternary Phase Diagrams Construction 2.4 Characterization of Microemulsion 2.5 Study on the Effect and Mechanism of Microemulsion for Enhanced Oil Recovery 3 Results and Discussion 3.1 Surfactant Preference 3.2 Determination of the Best Cosurfactant and Salinity 3.3 Particle Size Distribution and Stability of Microemulsion 3.4 Interfacial Properties of Microemulsion (Interfacial Tension and Wettability) 3.5 3.5. NMR Characterization of Static Imbibition of Microemulsion 3.6 NMR Characterization of Dynamic Imbibition of Microemulsion 3.7 2.5D Micro Model for Characterization of EOR of Microemulsion 3.8 Mechanism of Microemulsion EOR 4 Conclusions References Study on Key Technology of Tapping Potential and Adjustment at High Water Cut Stage in Offshore Delta Oilfield 1 Introduction 2 Reservoir Fine Depiction and Quantitative Characterization Technology of Single Sand Body in the Offshore Delta Facies 2.1 Fine Characterization of Offshore Delta Reservoir 2.2 Quantitative Identification Technology of Dominant Reservoir Boundary Between Well Rows Based on Seismic and Logging Multi-information Coupling 2.3 Study on Quantitative Characterization Technology of Reservoir Heterogeneity in the Layer 2.4 Main Controlling Factors and Enrichment Types of Remaining Oil in Oilfield at High Water Cut Stage 3 Quantitative Characterization Technology of Remaining Oil in Offshore Delta Heavy Oil Field at High Water Cut Stage 3.1 Establishment of Quantitative Characterization Model of Remaining Oil in High Water Cut Later Stage 3.2 Analysis of Main Controlling Factors of Water Flooding Thickness at High Water Cut Stage 3.3 Proportional Diagram of Water Flooding Thickness at the Later Stage of High Water Cut 4 Key Technologies of Adjusting and Tapping Potential Based on the Development Law of Heavy Oil in High Water Cut Stage 4.1 Study on Development Law of Heavy Oil in High Water Cut Stage 4.2 Experimental Study on Rheological Properties of Heavy Oil 4.3 Establishment of the Relationship Between Formation Heavy Oil Viscosity and Seepage Velocity 4.4 Reservoir Numerical Simulation Considering Non-Newtonian Characteristics of Heavy Oil 5 Field Application Examples 6 Conclusion References A New Insight into Comprehensive Treatment of Particle Migration Damage in Offshore Loose Sandstone Oilfield 1 Introduction 2 Experiments 2.1 Materials 2.2 Methods 3 Results and Discussion 3.1 Corrosion Performance of Acid Solution on Clay Minerals 3.2 Analysis of Particle Size After Chelating Weak Acid Corrosion 3.3 Analysis of Acidification Speed Sensitivity 3.4 Analysis of the Effect of Chelating Weak Acid on the Properties of Chemical Sand-Consolidating Fluid 3.5 Acidification Effect of Chelating Weak Acid 3.6 Consolidation Time of Chemical Sand-Consolidating Fluid 3.7 Analysis of the Compatibility 3.8 Compressive Strength of Consolidated Debris Particle 3.9 Erosion Resistance of Consolidated Debris Particle 3.10 Field Application 4 Conclusion References Research and Application of Dual-Packer Single-Layer Volume Fracturing String with Pressure Drag 1 Introduction 2 Technological Status 3 Research Approach 4 Development of Controllable Check Valve 4.1 Working Principle 4.2 Technical Features 4.3 Technical Parameters 5 Development of Dual-Packer Single-Layer Fracturing String with Pressure Drag 5.1 Working Principle 5.2 Optimization of Supporting Tools 6 Field Application 7 Conclusion References Experimental Investigation on the Pyrolysis Characteristics of Low-Medium Maturity Shale Under Supercritical CO2 1 Introduction 2 Experiment 2.1 Experimental Sample 2.2 Experimental Methods 3 Comparative Experiment of Pyrolysis Atmosphere 3.1 Product Yield 3.2 Product Properties 4 Temperature Effect Experiment 4.1 Product Yield 4.2 Product Properties 5 Conclusions References Optimization of Well Pattern and Injection-Production Parameters for Hydrocarbon Gas Drive in Tight Oil Reservoirs After Volumetric Fracturing 1 Introduction 2 Model and Methods 2.1 Mechanisms of Hydrocarbon Gas Drive to Enhance Recovery 2.2 Basic Overview of the Target Block 2.3 Phase Fitting and Phase Modeling 2.4 Simulation Modeling 3 Results and Discussion 3.1 Effect of Well Pattern Type 3.2 Effect of Five-Point Well Pattern Parameters 3.3 Effect of Five-Point Well Pattern Injection and Production Parameters 4 Conclusion References Study and Application of Influencing Factors on Sweep Coefficient of CO2 Miscible Flooding in Low Permeability Reservoir 1 Introduction 2 Factors Affecting the Sweep Efficiency of CO2 Miscible Flooding in Low-Permeability Oil Reservoirs 2.1 Single-Factor Analysis of the Sweep Efficiency 2.2 Evaluation of Main Control Factors 2.3 Sweep Efficiency