GEMINI (Geo-Engineering Modeling through INternet Informatics)

Kansas Geological Survey Open-file Report 2002-10

Future

Additional Engineering modules

• Production data analyst - well, lease, field
• Material Balance - field level
• Parameterization for fluid flow simulation

Material Balance (2)

• Importance in reservoir characterization
  • identify drive mechanism
  • confirm reservoir volumetric
  • aquifer fitting
• Bottom water drive - above bubble point
  • water influx - Carter Tracy Aquifer model
  • simplified eq. F/E = N + W_o/E
  • E = E_o + E_fw
  • B_w = 1

Integration of Reservoir Scales

GEMINI analyses are closely tied to pore types with rock analyses and relationships readily available to the user. The user can revisit and modify the petrophysicas as new logs and rock data become available. Additional information such as well test and lease production provide additional scales of observation that assist in determining reservoir continuity and conformance. A goal is that once this integrated analysis is completed, that the derived reservoir parameters and grids will significantly constrain reservoir simulation and provide results that are more predictive and geologically realistic.

Integration of Geo-Engineering Java Applets
Well Level Analysis User/Project Interface Well Profile PfEFFER - log analysis Digital Rock Catalog DST Production - chart & map Synthetic Seismogram = time and SEG-y Fluid composition PVT KHAN - Kansas Hydrocarbon Association Navigator (pay assistant)	Field Level Analysis Correlative Modeling Cross Section tools Mapping Volumetrics Material Balance Integrate modules Parameterization & Export for fluid flow simulation modeling and other applications/presentation

Parameterization for Simulation

• Flow units/reservoir layers (intervals)
• Gross/net pay height
• Depth to layer
• Porosity
• Permeability X Y Z
• Relative permeability and capillary pressure data or correlations to generate them
• PVT data or correlations to generate them
• Aquifer selection and definition
• Fluid saturations
• Water saturation
• Initial pressure
• Calculation constraints (time steps, saturation, change limitations, gas oil ratio, water oil ratio and pressure limitations)
• Well locations
• Water history data (production history, pwf, skin value for each well)

e-mail : webadmin@kgs.ku.edu
Last updated March 2002
http://www.kgs.ku.edu/PRS/Poster/2002/2002-10/P3-04a.html