Formation Water Property Interpolation and Mapping from Wireline Logs for the Table Rock Field in the Greater Green River Basin - PowerPoint PPT Presentation

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Formation Water Property Interpolation and Mapping from Wireline Logs for the Table Rock Field in the Greater Green River Basin

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Produce map of Table Rock field displaying location relative to political boundaries ... Depth useful for determining general structure of formation and degree ... – PowerPoint PPT presentation

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Title: Formation Water Property Interpolation and Mapping from Wireline Logs for the Table Rock Field in the Greater Green River Basin


1
Formation Water Property Interpolation and
Mapping from Wireline Logs for the Table Rock
Field in the Greater Green River Basin
  • Patrick Fortson
  • Hunt, Wallace and Associates LLC
  • December 2, 2004

2
Purpose
  • Produce map of Table Rock field displaying
    location relative to political boundaries
  • Combine township/range map with field map
  • Interpolate formation properties between wells
    for areas where no data is available

3
Overall Goal
  • Determine if water saturated formations can be
    used as water injection zones for disposal of
    produced water

4
Southwestern Wyoming
  • Wastelandish and proud of it

5
  • Still beautiful despite its emptiness

6
  • People are strange, when youre a stranger

7
  • Meteorites abound

8
Data Sources
  • Wyoming Oil and Gas Conservation Commission
  • Wyoming Geographical Information Sciences Center

9
Southwestern Wyoming
  • Biggest city is Rock Springs Pop. 23016

10
Well Files from WOGCC
  • Data Available
  • Production History
  • Well Logs
  • Formation Tops
  • Gas/Water Analysis
  • Perforation Intervals

11
Well Records
12
Lack of Data
  • Virtually no water analysis data

13
Table Rock Field
14
Table Rock Formations
  • Wasatch
  • Fort Union
  • Lance
  • Fox Hills
  • Lewis
  • Almond

Water Present
15
Wireline Logs
  • Gamma Ray, SP, and Resistivity Log for Fox Hills
    Water Sand
  • Other logs give density and neutron porosity,
    sonic

Deep Resistivity
SP Deflection
16
Static Spontaneous Potential for Determining
Water Resistivity and Salinity
  • Rmf to Rmfeq using formation temperature

17
SSP-Rweq Nomograph
  • SP deflection to Rmfeq/Rweq ratio using formation
    temperature
  • Ratio with Rmfeq to get Rweq

18
  • Rweq to Rw

19
  • Rw to formation temperature
  • Follow curve to NaCl concentration in ppm

20
Problems with Salinity
  • Special software needed for viewing large raster
    images of logs
  • Only four wells have enough viewable data to
    determine salinity
  • Not enough points for good analysis
  • Geostatistical Analyst will not run with fewer
    than 10 data points

21
Depth to Formation Top and Thickness
  • Depth useful for determining general structure of
    formation and degree of folding
  • Thickness gives idea of pinchouts and volume
    estimations
  • Only Fox Hills and Lewis Formations had data for
    good interpolation

22
Spatial Analyst
  • Analysis Mask sets boundary of interpolation
  • Problems with Kriging
  • Inverse Distance Weighted includes Null data
    points

23
Geostatistical Analyst
24
  • Same general shape as Fox Hills

25
  • Possible bad data at bottom

26
  • Thickens towards top

27
More Work
  • Use ArcScene to develop 3D geologic models of
    formations
  • Try to find more data to acquire salinity

28
Conclusions
  • GIS illuminated well placement and field location
  • Geostatistical Analyst provides insight into
    formation property trends
  • Free data is good but not good enough
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