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页岩地层井壁稳定反分析法研究

摘要第4-5页
Abstract第5页
Chapter 1 Introduction第9-19页
    1.1 Background of Shale gas exploration and development第9-11页
    1.2 Literature Review第11-17页
    1.3 Research methodology and steps involved第17-18页
    1.4 Research Summary第18-19页
Chapter 2 Physical and Mechanical Properties of Shale Formation第19-38页
    2.1 Physical properties of shale formation第19-22页
        2.1.1 Shale Gas Composition第19-22页
    2.2 Mechanical properties of shale formation第22-27页
        2.2.1 Stress第23-25页
        2.2.2 Strain第25-27页
    2.3 Elasticity,In-situ stress and stress concentration around a wellbore第27-33页
        2.3.1 Hook’s law第27-28页
        2.3.2 Poisson’s ratio第28页
        2.3.3 Stress components第28-29页
        2.3.4 Principle stress第29-30页
        2.3.5 Regional stress–in-situ stress第30-31页
        2.3.6 Stress around wellbore第31-33页
        2.3.7 Stress transformation第33页
    2.4 Rock strength properties第33-37页
        2.4.1 Cohesion第33-34页
        2.4.2 Internal friction angle第34页
        2.4.3 Unconfined compressive strength,UCS第34-35页
        2.4.4 Deformation analysis第35-37页
    2.5 Young's modulus and Poisson's ratio of gas shale第37-38页
Chapter 3 Application to Field scale:Borehole stability analysis第38-70页
    3.1 Stress distribution around a vertical well第39-44页
    3.2 Failure modes第44-49页
        3.2.1 Tensile failure第45页
        3.2.2 Shear failure第45-48页
        3.2.3 Creep failure第48页
        3.2.4 Pore collapse or comprehensive failure第48-49页
    3.3 Well fracture model第49-50页
        3.3.1 Non-Penetrating-Fracture model第49页
        3.3.2 Penetrating-Fracture model第49-50页
        3.3.3 Complete History match fracture model第50页
    3.4 Well collapse models第50-55页
        3.4.1 Von Mises failure criterion第50-51页
        3.4.2 Mohr-Coulomb failure criterion第51-52页
        3.4.3 Griffith failure criterion第52-53页
        3.4.4 Hoek-Brown failure criterion第53-54页
        3.4.5 Druker-Prager failure criterion第54页
        3.4.6 Mogi-Coulomb failure criterion第54-55页
    3.5 Formation pressure integrity testing(PIT)第55-58页
        3.5.1 Formation Integrity Test(FIT)第56页
        3.5.2 Leak-off test(LOT)第56-57页
        3.5.3 Extended Leak-Off(ELOT/XLOT)第57-58页
    3.6 Overview of instability problems on the field第58-63页
        3.6.1 Washouts第58-59页
        3.6.2 Cavings第59-61页
        3.6.3 Lost circulation/mud loss第61页
        3.6.4 Stuck pipe第61-62页
        3.6.5 Tight spots第62页
        3.6.6 Gumbo第62-63页
    3.7 Defining the right mud weight第63-65页
    3.8 Collapse pressure calculation and analysis第65-70页
        3.8.1 A Case analysis第66-67页
        3.8.2 Stability measures of shale gas reservoir第67-70页
Chapter 4 Numerical Interpretation of Back Analysis technique for borehole stability第70-105页
    4.1 Basic introduction to Back Analysis第70页
    4.2 Types of back analysis第70-72页
    4.3 Mathematical derivation of Back analysis for rock mechanics第72-80页
        4.3.1 Description of problem and method of back analysis第72-74页
        4.3.2 The Principle of Back Analysis for well bore stability and its methodology第74-80页
    4.4 Introduction to GMI-Modelbuilder and Wellcheck第80-82页
        4.4.1 Preparation of logging data using GMI-Modelbuilder第81-82页
    4.5 Pore pressure and Fracture pressure calculation using GMI-Wellcheck第82-90页
        4.5.1 Data interpretation and analysis第82-90页
    4.6 Back analysis methodology used in GMI-Caliper第90-96页
        4.6.1 Two-Arm Caliper tools第90页
        4.6.2 Four–Arm Caliper tools第90页
        4.6.3 Caliper Log Presentation第90-92页
        4.6.4 Simple Caliper log Interpretation第92页
        4.6.5 Uses of caliper log第92-93页
        4.6.6 Borehole Breakout第93-94页
        4.6.7 Four-Arm Caliper tools needed parameters第94页
        4.6.8 Case study and Field data analysis:Jiang Depression第94-96页
    4.7 Field Case study第96-104页
        4.7.1 Well X第96-97页
        4.7.2 Well Y第97-99页
        4.7.3 Stacked Well Plots—Pads and Breakouts第99-100页
        4.7.4 The Histogram plot第100-101页
        4.7.5 Frequency Plot—Rose Diagram第101页
        4.7.6 3-D View Plot第101页
        4.7.7 Hole/Cement Volume Plot第101-104页
    4.8 Wellbore models extracted from GMI-Caliper第104-105页
Conclusions and Future work第105-106页
References第106-109页
Acknowledgement第109页

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