Underground Withdrawal Calculation

Description

Calculate underground withdrawal (F term) for material balance analysis. F represents total reservoir voidage from oil, gas, and water production.

F Term Components:

  • Oil production converted to reservoir conditions
  • Free gas production at reservoir conditions
  • Water production at reservoir conditions

Spreadsheet Preview

27 rows x 3 columns

Required Functions

PO.MBE.F.Oil

Calculates underground withdrawal for oil reservoir, [RB]. F = Np*(Bo + (Rp-Rs)*Bg) + Wp*Bw.

PO.MBE.F.Gas

Calculates underground withdrawal for gas reservoir, [RB]. F = Gp*Bg + Wp*Bw.

How to use this blueprint
  1. In Excel, go to the Petroleum Office ribbon tab and click Blueprint Manager
  2. Search for Underground Withdrawal Calculation
  3. Click on the blueprint to preview the spreadsheet template
  4. Click Insert to place it into your worksheet. Modify the input values to match your data.

Related Theory

Underground Withdrawal and Expansion Terms

Calculation of underground withdrawal F, expansion terms Eo, Eg, Efw, effective compressibility, and two-phase formation volume factor Bt

Material Balance Overview

Overview

Guide to material balance methods for reservoir engineering including drive mechanism identification, OOIP/OGIP estimation, and aquifer modeling

Gas Reservoir Material Balance

p/z method for volumetric gas reservoirs, modified p/z for geopressured reservoirs, and OGIP estimation techniques

Related Blueprints

Gas Reservoir Production Forecast

Forecast gas reservoir pressure and production using material balance equations. Given OGIP, predict pressure at future production levels or vice versa.

Effective Compressibility Calculations

Calculate effective compressibility for different reservoir types. Effective compressibility is critical for material balance and pressure buildup analysis.

Fetkovich Aquifer Model

Calculate water influx using the Fetkovich pseudo-steady state aquifer model. This simplified approach treats the aquifer as a tank with a productivity index.

Gas Reservoir p/z Analysis

Perform p/z analysis for gas reservoirs to estimate OGIP (Original Gas in Place). The p/z vs Gp plot is linear for volumetric depletion, with x-intercept = OGIP.

Van Everdingen-Hurst Aquifer Model

Calculate water influx using the Van Everdingen-Hurst (VEH) transient aquifer model. This rigorous method handles both infinite and finite aquifers with time-dependent pressure response.

Material Balance Expansion Terms

Calculate material balance expansion terms for oil reservoir analysis. These terms quantify fluid and rock expansion as pressure drops during production.

Tags:
mbewithdrawalvoidageF-termproduction

Need a custom calculation? Request a Blueprint

An unhandled error has occurred. Reload X