Ryder Scott

RamBal

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RamBal is an easy-to-use, Excel-based tool for material balance calculations to help predict future performance of abnormally pressured, unconventional gas fields.

The algorithm compensates for reservoir rock and water compressibility in determining both original gas in place (OGIP) and recoverable reserves and accounts for finite downdip free water expansion. The program requires only the commonly available reservoir pressures, temperature data and gas properties and includes "calculators" and tips to help the experienced petroleum professional assess the appropriate compressibility coefficients as well as the conversion of separator gas components to reservoir (wet gas) conditions.

A user'."'".'s manual is included in a Excel file accessible from the engineering menu. As is the case with all posted freeware, the new material balance application produces presentation-quality on-screen views and printer-friendly, hard-copy output.