Page 139 - Open-Hole Log Analysis and Formation Evaluation
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Formation
                                                                        10
                                                                                     Factor
                   A
                                                                                                                     Il.

                                                 1
              the
                               the
                           they
                                   6.18).
                                     where
                                          FIGURE
                           do
                produce
                               only
                                     7
                             mations;
          constant.
                   proper
                                          6.17
                                 Because
                                     is
            and thus.  at
                           not
                     PRACTICAL
                                                    :
                                                                                                                     METHODS
                             but
                                     the
                some
              observation
                             in
                           work
                                 Archie’s
          Variations
                           as
                   marriage
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                          See
                                                 :
                           well.
                                     saturation
              when
                                 model
                                                          -
                spectacular
              a
                                                   Tom
                                          Generalized  F-to-¢
                     PETROPHYSICS
                                                 10
                               path, his
                                               Porosity
                  between
                                               ¢
                             formations
                             ons
                                               %
          of  porosity  ate
                results.
                                     exponent
                                                   T
                                                          Decreasing
                                 considers
                                                          a
              formation
                                     and
                One
              is
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                                          Relationship.
          normal
                                     is
                                                                                                                     OF  ANALYSIS  AND  APPLICATION

            irreducible  water saturation, the
                  petrophysics
                               relationships
                of
                             and where
                                                                                                                    OF
                                                          (Clastics)
                the
              above

                  and
                               work
                                     usually
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            product
                                 electrolyte
          on  a local
                most
                  log
                                     set
                               well
                                                                                                                    RESULTS
                                 in

                                                 100
            of  ¢
                                     to
                               in
          scale,
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              transition
                  analysis
                                                   P
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                interesting
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                                                    = 4
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                                                                                  0.0001
                                                               '
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                         the
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                                        line.
                                                             there
                   water
                             water
                                              figure
                         @
                                                                         FIGURE
                                                                                                                     THE
                                                      This
                                                  of
                                                           smaller,
                                                                   changes
          60%,
                                                             are
                                                    analyzed
                                                               reduced,
                                                                 laid  down
                                            saturation
                                                zone.
                                                                         6.18
                                                                   in
                                                               a
                                              6.19,
                       formations.
               production
             overlooked
          or
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                                                         maintaining
                                                    on

                                                                                    qT
                                    Reservoirs
                                                           thus
                         X S,,
                           (Ru bo/ Row)
                 permeability,
                                                                                      .  1  -  Liitit   100   %  Sw   wet)  10  —  n   =  (oil   t   mee   i   Increasing  m  (Hard  Rock)   1000       100  =   124  OF   ROCK/FLUID   SYSTEMS   125
                                                                         S,,
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                                                    a
                                                                                  0.001
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                                                                                                                     PHYSICS
                                                                                        n
                               characteristics.
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                       Note
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                                                Figure
                                                               greater
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                 even
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                                                6.19
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                                 used
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                   Conversely,
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                                                  reveal
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             those  who  were
                                                                                    To
                 they
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                                                    basis
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                                                                                  0.01
                                 as
          are
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                   in
                                                        X S,,
                                                                              Ro/R:
                                        zone
                                                      practical
                                                illustrates
                                 a
                                                  the
                     saturations
                             expected
                                                    for
                                   characterized
                                                             throats.
                                                           more
                               at
            once
          no
                have
              This
                                                               of  the
                         irreducible
                                            Figure
                                                the
                                        plot
                       low-porosity,
                           fluids
                     can
                                              linear  scales
                                                                   environment  at
                                   by
                                                                         Of Ro/R,  and
                                 basis
                                        to
                                          irreducible
                                                                        n.
                                                        product.
                                                               pore
                     be
                                                           water
          more
                                            6.20
                                                                   the
            taught
                                              and
                                   the
                                 for
                                        the
                                                  presence
                                                    porosity
              salient
                                                      application.
                                                          can
                             depending
                                   @
            (1)
                                                                 and  owing  to  subsequent  diagenesis.
                moderate
                                                             Either  way,
                                                  or
                           present.
                         saturation
                               irreducible
                                                    and
                   formations  with
                                                                 If,
                                                                                    I
                                        right
                                   X
                                                               throats
                             on
              fact
                                                                                  0.1
                                            shows
                                                          be
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              is
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                                   S,,;
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                                                               are
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                                              the  points
                values
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                           Figure
                                 predicting
          and
                                       of  the
                                                  absence
                                              at
              all
                                                             mean
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            less
                                                          in
                                                      zone
                                                Note
                                                  of
                                            similar
                                                               small
          (2)
                                                  a
                           6.21
                     without
                               saturation,
                S,,,
              too
                                                          the
                                                      has
                                   product,
            than
          do
                                                             radius
                                            plot
                         number
                     fear
                                                               ones
                                                    saturation,
              often
                                                  transi-
                       low-permeability  formation,
          not
                  porosity  and
                                   and
                                 production
                                                      been
                           shows
                                          saturation  plot  ona  straight
                               some
                                                               or
                                              irreducible
                water
                                                          pore
                                            on
                             mobility  ratio
                                                            ris
                                                that,.on
                                       irreducible
                                                    a
            50%
                                                                 locally,  porosity  is
                                                                   sediments  were
                     of
                         of
                                                                                  1

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