Petrophysics and Geochemistry

Petrophysics and Geochemistry is an interdisciplinary field that investigates how the chemical composition, mineralogy, and fluid content of rocks determine their measurable physical properties. By analyzing the elemental and isotopic makeup of both the rock matrix and the fluids within its pores, this discipline explains the origins of key petrophysical characteristics like porosity, permeability, density, and electrical resistivity. This integrated approach is fundamental to subsurface characterization, as it links the geochemical history of a formation—including sedimentation, diagenesis, and fluid-rock interactions—to the data used in evaluating reservoirs for hydrocarbons, groundwater, and geothermal resources.

1. Introduction to Petrophysics and Geochemistry
   1. Overview of Petrophysics
      1. Definition and Scope
      2. Historical Development
      3. Key Objectives in Petrophysical Studies
      4. Applications in Energy and Environmental Industries
   2. Overview of Geochemistry
      1. Definition and Scope
      2. Historical Development
      3. Key Objectives in Geochemical Studies
      4. Branches of Geochemistry
   3. Physical Properties of Rocks
      1. Rock Matrix Characteristics
      2. Pore Structure and Architecture
      3. Role of Fluids in Rock Systems
      4. Importance in Reservoir Evaluation
   4. Chemical Composition of Earth Materials
      1. Distribution of Elements in Crust
      2. Distribution of Elements in Mantle
      3. Distribution of Elements in Core
      4. Geochemical Cycles
   5. Elemental and Isotopic Analysis Principles
      1. Fundamentals of Elemental Analysis
      2. Fundamentals of Isotopic Analysis
      3. Analytical Precision and Accuracy
   6. Interdisciplinary Connections
      1. Relationship Between Petrophysics and Geochemistry
      2. Influence of Geochemistry on Petrophysical Properties
      3. Rock-Fluid System Concept
      4. Applications in Petroleum Geology
      5. Applications in Reservoir Engineering
      6. Applications in Environmental Studies
   7. Scales of Investigation
      1. Pore Scale
         1. Microscopic Features
         2. Pore Network Topology
         3. Imaging Techniques
      2. Core Scale
         1. Laboratory Measurements
         2. Representative Elementary Volume
         3. Scaling Considerations
      3. Log Scale
         1. Well Log Interpretation
         2. Vertical Heterogeneity
         3. Lateral Heterogeneity
      4. Reservoir Scale
         1. Field-Scale Modeling
         2. Integration of Multi-Scale Data
         3. Uncertainty Quantification