---
id: po.wb.pta.boundary-effects
title: Pressure Transient Analysis — Boundary Effects
category: PTA
tags:
  - pta
  - pressure-transient
  - boundary-effects
  - fault
  - channel
  - log-log
  - dimensionless
---

# Pressure Transient Analysis — Boundary Effects

## Purpose

Demonstrates pressure transient analysis with three boundary models: infinite reservoir,
single sealing fault, and perpendicular faults (channel). Shows PD vs tD on a table with
log-log diagnostic chart showing characteristic boundary signatures.

## Plan

- [x] Inputs sheet with named cells for reservoir/well/boundary properties
- [x] PD vs tD table for 19 time steps spanning 6 orders of magnitude
- [x] Three boundary models: infinite, fault, channel
- [x] Log-log diagnostic chart
- [ ] Add derivative (dPD/dlntD) column and overlay
- [ ] Add real-unit conversion sheet (Pw vs t)