Estimating Reserves

In the early life of an oil or gas reservoir when there is little or no production data, the estimates of reserves are generally obtained by volumetric calculations, which require a knowledge of the size of and the properties included in the reservoir.  The properties of the reservoir are predominantly measured by various logs run in the wellbores.  We offer:

• Detailed log analysis in all major producing areas.
• Ability to use computer programs developed in-house to provide accurate calculations of parameters.

If the reservoir has been producing, performance analyses may be applied.  Whenever possible, or when required, Wright and Company, Inc. will utilize one or more estimation methods to obtain a consistent result.  In addition, comparisons with offset data are used to verify the results and determine if they are analogous with other fields in the area.  Reserves estimation methods include:

• Decline Curve Extrapolation
• P/Z Curves
• Ratio Plots
• Analogy to other similar producing properties
• Material Balance Calculations, including the Numerical Simulator