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Below are some handy formulas to give you a "quicklook" answer for some of those pesky questions that pop up from time to time. These are not meant to provide final, decision-making answers to your questions - just "quick looks". These formulas are taken from standard industry references and have been entered into a spreadsheet format.

PLEASE TAKE NOTE: Unfortunately, in order to use these formulas (or even see them), you must have Internet Explorer and Microsoft Office 2000 (or higher) installed on your machine. In addition, those computers with a new installation of Microsoft Office 2003 may also experience difficulty viewing & using these formulas. We apologize - this is a Microsoft problem and one that we hope will be resolved in the future. For more information, please visit the Microsoft Office web site.

For those who do happen to have Microsoft Office 2000 or 2002 on their computers, we hope these tools will be of some use. Just fill in the input boxes (blue for variables, white for constants) for "quicklook" answers. For those who do not have these products or have a new installation of Office 2003, please keep checking this site - we hope to provide an alternative solution for you in the future. As always, suggestions to add to or improve upon this service are welcome.

For other online tools, see Oil & Gas Online Tools and Conversion Tables & Calculators.

Log Calculations

• Porosity
• RMF / SSP
• Resisitivity
• Water Saturation
• Shale Volume
• Temperature

Depth Conversions

• True Vertical Depth (TVD) Conversions
• True Vertical Thickness (TVT) Calculations
• Time - Depth Conversions

Reserve Calculations

• Volumetrics
• Hydrocarbons In Place
• BCFG / MMBO Equivalence
• Geologic Chance Factor