Estimates of gas and coal resources depend directly on net-coal thickness, gas content, coal density, and ash yield, and indirectly on coal rank, structure, hydrogeology, and topography. The term “net coal thickness’ refers to the cumulative thickness of strata classified as coal. Coal Seam Gas Exploration & Production Services uses the methodology developed by SPE. The prospect area is to be divided into grids in first stage of this approach. The second stage is assigning clean coal thickness and gas content values to each grid, and then calculation of coal and coal seam methane resources for each grid. Gas content values are estimated based on depth versus gas content type curves. Coal thickness is based on a density cut-off of 1.75 g/cc. The GIP calculations are based on definitive polygonal resource estimation techniques over the extensive drill core and petrophysical database. Coal Seam Gas Exploration & Production Services provide high level of data assessment and follow all engineering procedures in GIP Resource and Reserve Estimations.  Reserves are defined by PRMS as those quantities of petroleum anticipated to be commercially recoverable by: application of development projects to known accumulations; from a given date forward; and, under defined conditions. Reserves must satisfy four criteria in that they must be discovered, recoverable, commercial, and remaining (as of the evaluation date) based on the development project(s) applied.   This means reserves must be determined in conjunction with a specified commercialization strategy (e.g., eminent contract/development, spot sales, third-party infrastructure project, etc.).  From there, reserves may be sub-classified based on project maturity and/or characterized by development and production status.