GEMINI (Geo-Engineering Modeling through INternet Informatics)

Kansas Geological Survey Open-file Report 2002-10

Example #2 Volumetric Calculations

Approach to Volumetric Analysis

• Map parameters of net pay in produced units:
  • a) porosity, b) water saturation, c) thickness
• Utilitze simple gridding model
• Compare consistency between hydrocarbon volumes from independent methods: a) volumetric (V_vol) and b) material balance (M_vol)
  • where M_vol <= V_vol
  • and M_vol/V_vol approx. equal to 90%
• If not consistent, go back to petrophysical analysis and definition of flow units
• GEMINI provides opportunity for iterative solution

Volumetric calculations are available to all users of GEMINI, including geologists, engineers, and core and log petrophysicist. Volumetric and material balance analyses serve as an important intermediate step towards reservoir simulation. GEMINI permits iterations between the petrophysics describing the pore properties and volumetrics to optimize solutions that best fit the pore properties. Comparison between volumetrics and material balance volumes provide a means to check the accuracy of pore type characterization, flow units and their spatial correlations (continuity and conformance). The user is allowed to revisit the geomodel and make revisions as new data becomes available.

e-mail : webadmin@kgs.ku.edu
Last updated March 2002
http://www.kgs.ku.edu/PRS/Poster/2002/2002-10/P3-03a.html