Introduction -- Brief Review of Unique U. Reservoir Properties Affecting PDA

• Pore structure and gas storage mechanisms
• Material balance
• Flow mechanisms: matrix and fracture flow
• Non-static permeability
• Multi-phase flow

Brief Review of UR Completion/Stimulation Methods Impacting PDA

• Cavity completed wells
• Vertical, hydraulically fractured wells
• Horizontal wells, naturally completed, and multi-laterals
• Multi-fractured horizontal wells                                                               

Rate-Transient Signatures

• Introduction to Concept
• Example Signatures of:
• Vertical wells in low-k single porosity reservoirs
• Horizontal wells in low-k single-porosity reservoirs
• Multi-fractured hz wells in low-k single porosity reservoirs
• Multi-fractured hz wells in low-k double-porosity reservoirs

Analytical Methods for Rate-Transient Analysis

• Overview of Techniques
• Type-Curve Methods
• Modification of pseudo-variables to account for unique UR properties
• Example type-curve sets and application                                     
• Straight-line (flow-regime) Methods
• Transient flow (bilinear, linear, elliptical and radial flow)
• Boundary-dominated flow (FMB)
• Simulation
• Some tips on model setup, history-matching and integration with RTA

Empirical Methods for Rate-Transient Analysis

• Arps Decline Curves  - use with Fetkovich type-curves
• New Methods (ex. Power-Law Exponential)

Examples

• Tight gas
• Single- and multi-phase shale gas
• Single- and multi-phase CBM