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Kane_Barnett_petrophysics by zhangyun

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									Petrophysical Characterization
 of the Barnett Shale: Status

                  Jeff Kane
         Bureau of Economic Geology
          PBGSP Annual Meeting
           February 27-28, 2006
Overview

•   Database construction
•   Geophysical log analysis model
•   Texas United Blakely #1
•   Finish up




           Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Database construction

• Current wireline database consists of:
  • 7 wells with geochemical data
     •   2 with log data
     •   1 with mineralogy data
     •   1 with limited P & P data
     •   1 with capillary pressure data
     •   2 with core descriptions




            Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Database construction

• Many of these core data were recently provided
  by Dan Jarvie of Humble Geochemical Services,
  so I would like to thank him for his generosity




        Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling

• A quick historical look
• A mineralogical model
• Kerogen




         Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling – some history

• Much of the methodology used today appears to
  come from work originally performed on the T.P.
  Sims #2 (ResTech, 1991)
• This methodology comes from work done in the
  Devonian Shale (GRI, 1989)
• Since then little published information has been
  found in the public sector.




         Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling - Mineralogy

                                                                  Mineralogy distribution
                                                                     W. C. Young #2
              90


              80


              70


              60
 Volume (%)




              50


              40


              30


              20


              10


               0
                   Total Clay        Quartz         K-Feldspar        Plagioclase            Calcite      Dolomite       Pyrite   Apatite

                                                                 Q1      Min        Median         Max   Q3




                                Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling - Kerogen

• Kerogen is one of the wildcards we have to deal
  with – it appears as porosity to logs
• It has a density of about 1.0 to 1.2 g/cc; however
  it is probably more variable than this range
  suggests
• It has a hydrogen index of about 0.65 to 0.70
  (water = 1.0)




          Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling - Kerogen

                              TOC  ( S1  C S1 )
          Wk 
                                                          Ck
 (from Guidry and Olszewski, 1990) where:
         Wk is the weight of kerogen
         TOC is the weight fraction of total organic carbon
         S1 is the weight fraction of free oil
         CS1 is the weight fraction of carbon in the free oil
         Ck is the weight fraction of carbon in the kerogen

   Guidry and Olszewski (1990) suggest 0.87 and 0.75 for CS1 and Ck
    respectively. Jarvie (1999) recommends a value of 0.83 for CS1.



            Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling - Kerogen

                                         Wk  r B
                  Vk 
                                                     rk
 where:
          Vk is the volume fraction of kerogen
          Wk is the weight of kerogen
          rB is the bulk density
          rk is the kerogen density




            Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling - Kerogen

• The preceding is from derived from core data,
  not log data
• Initially, correlations have to be developed to
  estimate kerogen volume from logs
• This work is currently underway




         Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling

• We have a mineralogical model of clay, quartz,
  calcite, dolomite, pyrite, apatite, kerogen, and
  fluids (water and gas)
• We have a set of logs that have known or
  estimated responses to each of these model
  points
• We can construct a set of equations to describe
  these relationships



         Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Geophysical log modeling

• This leads to a set of simultaneous equations
  that allow us to solve for the volumes of the
  geologic constituents present
• This is fundamentally the same approach used
  by programs such as ELAN™ and OPTIMA™
• We will be using the Geolog™ package
  MultiMin™




         Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Overview of what the logs show

 Texas Blakely #1 wireline log analysis




        Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Texas United Blakely #1




        Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Texas United Blakely #1
        Corrected gamma ray                        Uranium                                                      Deep induction
    0          GAPI           300           -10      PPM           30                                 0.2           OHMM            2000

          Total gamma ray           DEPTH          Thorium                     Bulk density                   Medium induction
    0          GAPI           300    FEET   0        PPM           40 2            G/C3             3 0.2           OHMM            2000

              Caliper                             Potassium                  Neutron porosity                Shallow focussed log
    6           IN            16            -5        %             5 0.3          V/V            -0.1 0.2          MMHO            2000




                                    7100




                                    7200




                                    7300




                                    7400




                 Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
                      Texas United Blakely #1

                       2.40                                        0.15                                                               2.40                                          0.15




                      2.45                                                                                                            2.45


                                                   0.1                                                                                                            0.1
                      2.50                                                                                                            2.50
Bulk density (g/c3)




                                                                                                                Bulk density (g/c3)
                      2.55                                                                                                            2.55
                                     0.05                                                                                                           0.05


                      2.60                                                                                                            2.60



                      2.65                                                                                                            2.65


                       2.70                                                                                                           2.70




                                                                                                                                                           0.05



                                                                                                                                                                             0.10



                                                                                                                                                                                           0.15



                                                                                                                                                                                                  0.20
                                            0.05




                                                            0.10




                                                                          0.15




                                                                                    0.20




                                                                                                                                             0.00




                                                                                                                                                                                                         0.25
                              0.00




                                                                                              0.25




                                                         Neutron porosity (v/v)                                                                                          Neutron porosity (v/v)
                      7090                                                                           7250                               0                                                                       300
                                                             Depth (feet)                                                                                               Total gamma ray (gapi)




                                                            Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
                      Texas United Blakely #1

                      2.40                                          0.15                                                              2.40                                        0.15




                      2.45                                                                                                            2.45


                                                  0.1                                                                                                             0.1
                      2.50                                                                                                            2.50




                                                                                                                Bulk density (g/c3)
Bulk density (g/c3)




                      2.55                                                                                                            2.55
                                    0.05                                                                                                            0.05


                      2.60                                                                                                            2.60



                      2.65                                                                                                            2.65


                      2.70                                                                                                            2.70
                                           0.05



                                                             0.10



                                                                           0.15



                                                                                    0.20




                                                                                                                                                           0.05




                                                                                                                                                                           0.10




                                                                                                                                                                                         0.15




                                                                                                                                                                                                 0.20
                             0.00




                                                                                                                                             0.00
                                                                                              0.25




                                                                                                                                                                                                        0.25
                                                         Neutron porosity (v/v)                                                                                         Neutron porosity (v/v)
                        0                                                                            300                                0                                                                      7
                                                        Total gamma ray (gapi)                                                                                    Total organic carbon (wt. %)




                                                            Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Texas United Blakely #1
        Corrected gamma ray                        Uranium                                                      Deep induction
    0          GAPI           300           -10      PPM           30                                 0.2           OHMM            2000

          Total gamma ray           DEPTH          Thorium                     Bulk density                   Medium induction
    0          GAPI           300    FEET   0        PPM           40 2            G/C3             3 0.2           OHMM            2000

              Caliper                             Potassium                  Neutron porosity                Shallow focussed log
    6           IN            16            -5        %             5 0.3          V/V            -0.1 0.2          MMHO            2000




                                    7100




                                    7200




                                    7300




                                    7400




                 Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
                               Texas United Blakely #1

                                  8                                                                                                         8

                                  7                                                                                                         7


                                  6                                                                                                         6
Total organic carbon (wt. %)




                                                                                                          Total organic carbon (wt. %)
                                  5                                                                                                         5


                                  4                                                                                                         4


                                  3                                                                                                         3


                                  2                                                                                                         2


                                  1                                                                                                         1

                                  0                                                                                                         0




                                                                                                                                                                        12
                                             2.40




                                                            2.50




                                                                           2.60




                                                                                                                                                    3




                                                                                                                                                        6




                                                                                                                                                                   9
                                                                                                                                                0




                                                                                                                                                                             15
                                      2.30




                                                                                        2.70




                                                    Bulk density (g/c3)                                                                                 Uranium (ppm)
                               7090                                                            7250                                      7090                                     7250
                                                      Depth (feet)                                                                                      Depth (feet)




                                                      Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Texas United Blakely #1
        Corrected gamma ray                        Uranium                                                      Deep induction
    0          GAPI           300           -10      PPM           30                                 0.2           OHMM            2000

          Total gamma ray           DEPTH          Thorium                     Bulk density                   Medium induction
    0          GAPI           300    FEET   0        PPM           40 2            G/C3             3 0.2           OHMM            2000

              Caliper                             Potassium                  Neutron porosity                Shallow focussed log
    6           IN            16            -5        %             5 0.3          V/V            -0.1 0.2          MMHO            2000




                                    7100




                                    7200




                                    7300




                                    7400




                 Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Texas United Blakely #1
          Total gamma Ray         Depth               Thorium - Potassium Ratio (smoothed)
                                    feet
      0          GAPI       300             0.5                                                             50




                                  7100




                                  7200




                                  7300




                                  7400




             Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Texas United Blakely #1




                                                      rals
                              10




                                                                                                ys
                                                                                           cla
                                          bearing mine


                                                                  nite




                                                                                         er
                                                                                     lay
                                                             Kaoli
                               8




                                                                                    d
                                                                                    xe
                                                                                  Mi
                                                 m
                                    Heavy Thoriu
            Thorium (ppm)


                               6
                                                                                                            t e
                                                                                                        Illi


                               4

                                                                                                                     ite
                                                                                                                 con
                                                                                                            glau
                                                                                                        ing
                                                                                                   clud
                               2                                                            a s in
                                                                                         Mic



                               0                                             Feldspars and potassium evaporites
                                                                0.5




                                                                           1.0




                                                                                          1.5




                                                                                                        2.0
                                   0.0




                                                                                                                      2.5
                                                                         Potassium (wt. %)
                                                                                 Depth
                            7050                                                                                            7450



        Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX
Summary

• We have just begun to build an extensive
  Barnett database
• We already have a basic model to analyze the
  Barnett from wireline logs
• Work to date suggest that logs will be of great
  value in providing detailed data on Barnett
  mineralogy and facies. More core-based work is
  necessary to verify this and and refine our initial
  model

          Jeffrey A. Kane, Bureau of Economic Geology , PBGSP Annual Meeting, 2/27-28/2006, Austin, TX

								
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