pyrestoolbox 1.1

pyResToolbox - A collection of Reservoir Engineering Utilities

pyrestoolbox

-----------------------------A collection of Reservoir Engineering Utilities -----------------------------

This set of functions focuses on those that the author uses often while crafting programming solutions. These are the scripts that are often copy/pasted from previous work - sometimes slightly modified - resulting in a trail of slightly different versions over the years. Some attempt has been made here to make this implementation flexible enough such that it can be relied on as-is going forward.

Includes functions to perform simple calculations including;

• Inflow for oil and gas
• PVT Calculations for oil
• PVT calculation for gas
• Creation of Black Oil Table information
• Creation of layered permeability distribution consistent with a Lorenze heterogeneity factor
• Extract problem cells information from Intesect (IX) print files
• Generation of AQUTAB include file influence functions for use in ECLIPSE
• Creation of Corey and LET relative permeability tables in Eclipse format

Apologies in advance that it is only in oilfield units with no current plans to add multi-unit support.

Changelist in v1.1:

• Fix API to SG calculation (141.4 vs 141.5)
• Added lower limit to first rho_po estimate for Oil Density with McCain method to avoid negative values with high Rs
• Added oil_sg and oil_api functions
• Modified HY Z-Factor solve algorithm to improve robustness
• Modified DAK Z-Factor solve algorithm to improve robustness
• Added Gas Z-Factor correlation from Wang, Ye & Wu (2021)
• Removed 'LIN' Z-Factor method due to significant errors above 12,000 psi. Use WYW method instead if speed needed.

Head to the project site for more information & documentation; https://github.com/mwburgoyne/pyResToolbox

Start by importing the package; from pyrestoolbox import pyrestoolbox as rtb

Function List includes

• Gas Flow Rate Radial
• Gas Flow Rate Linear
• Oil Flow Rate Radial
• Oil Flow Rate Linear

---

• Gas Tc & Pc Calculation
• Gas Z-Factor
  Calculation
• Gas Viscosity
• Gas Viscosity * Z
• Gas Compressibility
• Gas Formation Volume Factor
• Gas Density
• Gas Water of Condensation
• Convert P/Z to P
• Convert Gas Gradient to SG
• Delta Pseudopressure
• Gas Condensate FWS SG

---

• Oil Density from MW
• Oil Critical Properties with Twu
• Incrememtal GOR post Separation
• Oil Bubble Point Pressure
• Oil GOR at Pb
• Oil GOR at P
• Oil Compressibility
• Oil Density
• Oil Formation Volume Factor
• Oil Viscosity
• Generate Black Oil Table data
• Estimate soln gas SG from oil
• Estimate SG of gas post separator
• Calculate weighted average surface gas SG
• Oil API to SG
• Oil SG to API

---

• Calculate suite of brine properties

---

• Lorenz coefficient from Beta value
• Lorenz coefficient from flow fraction
• Lorenz coefficient to flow fraction
• Lorenz coefficient to permeability array

---

• Summarize IX convergence errors from PRT file
• Create Aquifer Influence Functions

---

• Create sets of rel perm tables