---
id: po.wb.pvt.complete-pvt
title: Complete PVT Properties — Oil, Gas & Water
category: PVT
tags:
  - pvt
  - standing
  - vasquez-beggs
  - glaso
  - black-oil
  - gas
  - water
  - bubble-point
  - formation-volume-factor
  - viscosity
  - z-factor
---

# Complete PVT Properties — Oil, Gas & Water

## Purpose

Multi-sheet PVT workbook demonstrating all major fluid property correlations
across oil, gas, and water phases. Uses named input cells so engineers can
quickly adapt to their reservoir conditions.

## Plan

- [x] Oil PVT table: Pb, Rs, Bo, Co, Uo vs pressure (undersaturated + saturated)
- [x] Oil charts: Bo, Rs, Uo vs pressure
- [x] Gas PVT table: Z, Bg, Ug, Cg vs pressure
- [x] Gas charts: Z, Bg vs pressure
- [x] Water PVT table: Bw, Rsw, Uw, Cw vs pressure
- [x] Water charts: Bw, Uw vs pressure
- [x] Correlation comparison: Standing vs Vasquez-Beggs vs Glaso
- [x] Named input cells on dedicated Inputs sheet
- [x] 25 pressure steps (200–5000 psia)
- [ ] Sensitivity analysis (vary API gravity)

## Lessons

- Gas functions use Rankine (°R = °F + 459.67), not Fahrenheit
- Water viscosity is a two-step calculation: first at 1 atm (f(T, salinity)), then adjusted for pressure
- Named ranges in EPPlus work across sheets automatically