• IPM Suite
• GAP
• PROSPER
• MBAL
• History Matching
• Multi-Tank Model
• DCQ Daily Contract Quantity
• Other MBAL Models
• PVTP
• RESOLVE
• REVEAL
• OpenServer
• IFM Suite

History Matching

MBAL incorporates the classical use of Material Balance calculations for history matching through graphical methods (like Havlena-Odeh, Campbell, Cole, etc.).

Detailed PVT models can be constructed (both black oil and compositional) for oils, gases and condensates. Furthermore, predictions can be made with or without well models and using relative permeabilities to predict the amount of associated phase productions.

Overview
MBAL provides four separate plots to determine the reservoir and aquifer parameters:

Graphical Method

• This graphical method plot is used to visually determine the different Reservoir and Aquifer parameters


• The aim of most graphical methods is to align all the data points on a straight line. The intersection of this straight line with one of the axes (and, in some cases the slope of the straight line) gives some information about the hydrocarbons in place


• In the Graphical method the diagnostics in terms of drives can be analysed. Based on the response of the Campbell plot, the presence of an aquifer is very likely (source of energy). The aquifer parameters along with the OOIP can be adjusted so that the Campbell plot will become a straight horizontal line and the model matched the measured data in the analytical method plot.

Analytical Method

• The analytical plot shows the Reservoir Pressure vs. Cum Production from the historical data and the model
  
• The analytical method uses a non-linear regression engine to assist in estimating the unknown reservoir and aquifer parameters. This method is plot based, i.e. the response of the model is plotted against historical data
  
• The parameters to select for regression will be the ones least trusted or the ones for which values were assumed rather than measured
  
• At the end of regression the values for which the best match is achieved are displayed

Energy Plot

• This plot shows the relative contributions of the main source of energy in the reservoir and aquifer system. It does not in itself provide the user with detailed information, but indicates very clearly which parameters and properties should be focused on. (i.e. PVT, Formation Compressibility, Water Influx.)
  
• The energy plot, shows the relative importance of each drive mechanism in the model

Dimensionless Aquifer Function (WD) Plot

• This plot is available if an aquifer model has been selected in MBAL
  
• The WD plot shows the dimensionless aquifer function versus dimensionless time type curves. This plot also indicates the location of the history data points in dimensionless co-ordinates

All four plots can be displayed individually or simultaneously.