1 Fluids Pressures and Gradients. - The Nature of Fluids. - Pressures and Fluids. - Conversion of Units. - Pascal's Principle. - Pressure Relationships in Fluid Networks. - Planes and Gradients. - 2 Formation Pressure Measurements and Data. - Sources of Pressure Data. - DST Pressure Charts and Pressure Extrapolation. - Accuracy of Drill Stem Test Measurements. - Formation Pressure Information from Well Records. - Computer Data Bases. - Repeat Formation Testing (RFT). - The Selective Formation Tester. - RFT Data. - Analysis and Interpretation of RFT Log Data. - 3 Fluid Environments. - The Hydrostatic Environment. - Internal ForcesStatic Environment. - The Hydrodynamic Environment. - Internal ForcesHydrodynamic Environment. - Hydraulic Segregation of Hydrocarbons. - Hydrocarbon Accumulations as a Function of Hydrodynamic Intensity. - Effects of Flow Magnitude and Direction on Locations of Hydrocarbon Pools. - Characteristics of Hydrostatic Environments. - Characteristics of Hydrodynamic Environments. - 4 Potential Energy Variation in Fluids. - Potential and Kinetic Energy. - Potential Energy in a Fluid. - Force Fields Flow Lines and Gradients. - Force Models of Hydrocarbon Traps. - Pressure Potential and Hydraulic Head. - 5 Rock Pore Space and Fluid Systems. - Rocks and Water. - Compaction Porosity and Pore Pressure. - Hydrodynamic Rock-Water Systems. - Water Expulsion and Escape. - 6 Nonnormal Formation Pressures. - Abnormal Pore Pressures. - Hydraulic Head and Potential Energy. - Causes of Abnormal Formation Pressure. - Osmosis Hydrodynamics and Abnormal Pressure. - Geopressures. - 7 Pressure Variation with Depth. - Pressure-Depth Gradient Diagrams. - Geologic Interpretation of PD Plots. - Regional Systems: Separate Hydrocarbon Reservoirs on a Common Aquifer. - Structural Trap Reserves Estimation Problem. - Subsurface Correlations Based on Pressure Data. - Interpretation of Pressure Differences on PD Graphs. - PD Gradient Plots and Potentiometrie Surfaces. - Pressure Deflection Maps. - Construction ofPressure System Maps. - 8 Potentiometric Maps and Subsurface Water Flow. - The Potentiometric Surface. - Inference of Subsurface Flow Patterns. - Examples of Potentiometric Maps. - Regional Potentiometric Maps and Basin Models. - Potentiometric Maps of Some Basins. - Local Potentiometric Anomalies and Hydrocarbon Accumulations. - Using a Constant Hydrostatic Gradient Value. - 9 Tilted and Displaced Oil and Gas Pools. - Nonhorizontal HydrocarbonWater Contacts. - Tilted OilWater Contacts Attributable to Factors Other Than Hydrodynamic. - Economic Significance of Tilted OilWater Contacts. - Characteristics of Hydrodynamic Environments. - U V Z Construction Procedure. - Mapping Oil and Gas Potential Energy Levels from Water Pressures. - 10 Entrapment Potential Cross Sections. - Hydrostatic Structural Trap. - Hydrodynamic Structural Trap. - Stratigraphic-Hydrodynamic Trap Model. - Regional-Scale Entrapment Potential Cross Sections. - U V Z Oil Prediction Problem. - 11 Entrapment Potential Maps. - Hydrocarbon Entrapment. - Hydrodynamic-Structural Trap and Entrapment Potential Mapping. - Displacement of Hydrocarbon Pools. - Hydrodynamic-Stratigraphic Entrapment Potential. - An Application of U V Z Mapping. - Regional and Local Mapping of Hydrodynamic Traps: Problem 1. - Local Mapping of Hydrodynamic Traps: Problem 2. - Regional and Local Mapping of Hydrodynamic Traps: Problem 3. - 12 Tilted Oil and Gas Pools: Some Published Examples. - References. - List of Symbols and Abbreviations. - Appendices. - A Answers to Problems. - B Picking HydrocarbonWater Interfaces from Well Logs. - C Relationship Between Pressure and Hydraulic Head. Language: English