Pressure Transient Analysis Templates
11 blueprints
Boundary Effects Analysis
Analysis of boundary effects on wellbore pressure. Compares infinite acting reservoir with single linear fault and perpendicular sealing faults.
Buildup Near Sealing Fault — Boundary Detection
Pressure buildup interpretation near a linear sealing fault. Demonstrates the classic derivative doubling signature: early IARF yields the correct permeability, then the Bourdet derivative doubles as the pressure signal reaches the fault and reflects back. Compares fault model against infinite reservoir to highlight the boundary effect.
Constant Pressure Boundary
Analysis of constant pressure boundary effects. Compares sealing boundaries with constant pressure boundaries (aquifer support).
Constant-Rate Drawdown Analysis
Constant-rate drawdown test interpretation using MDH (Miller-Dyes-Hutchinson) semilog analysis with Bourdet derivative for IARF identification. The most fundamental well test — a single rate from initial conditions. Includes forward model for synthetic data generation and round-trip validation.
Dimensionless Variables Conversion
Conversion between real and dimensionless variables for pressure transient analysis. Essential for type curve matching and analytical solutions.
DST Sequence Analysis — Horner Interpretation
Standard four-period drill stem test analysis: Initial Flow (IF) → Initial Shut-In (ISI) → Final Flow (FF) → Final Shut-In (FSI). Forward model generates synthetic gauge data using PO.PTA.Pw.VW with built-in superposition across all rate changes. Horner analysis of the FSI buildup extracts permeability, skin, and extrapolated pressure P*. Cross-checks ISIP against Horner P* as an independent reservoir pressure estimate.
Horner Plot Analysis — P* Calculation
Pressure buildup interpretation using Horner semilog analysis with Bourdet derivative for IARF identification. Includes forward model for synthetic data generation and round-trip validation.
Multi-Rate Drawdown — Step-Rate Test
Step-rate drawdown test with three rate periods. Demonstrates PO's built-in superposition via the `prod_data` array parameter — a single PO.PTA.Pw.VW call handles the full rate history. Uses rate-normalized pressure ΔP/q for interpretation, which removes rate dependence and allows permeability and skin extraction from any single rate period.
Radial Flow Analysis
Infinite acting radial flow analysis using line source solution and vertical well models. Calculates dimensionless pressure for pressure transient interpretation.
Skin Factor Effect
Demonstrates the effect of skin factor on wellbore pressure. Positive skin indicates damage, negative skin indicates stimulation.
Wellbore Storage & Skin — Type Curve Diagnostic
Dimensionless type curve display for wellbore storage and skin effects. Compares three WBS/skin scenarios showing how the CDe²ˢ grouping controls the transition from unit-slope storage to radial flow. Includes end-of-WBS time estimation and the 1.5 log-cycle rule for IARF onset.