Page 189 - Open-Hole Log Analysis and Formation Evaluation
P. 189

b.
          a.
                                              b.
                                                a.
                                                                   a
                                                                       a
              to
                                       tO
                        for
       The
                                    The
                        a
                          9.11,
                                         Step
                                                     then:
                                                Find
                                              Find
                Rnsis
                                                                             Trom
          Ry
                                                                     mean
              find:
                                                                         Figure
                                  fashion
                                         2:
                                                                             =
                                                                                          1:
                                                the
                            equation.
                                                                       variety
                              formation
                                                                   surface
                                  as
                                                                                                        Establish
                  QUESTION
                                                           QUESTION
                                                                 equivalent
                                                         According
                          where
       salinity
                                                                         9.10
                                temperature
                        number
          at  180°R.
                                                                       of
                                                         to
                                                                     annual
                                                                             Tour
                teported
                  #9.3
                                    resistivity
                                                           #9.2
                                              formation
                                                                             +
                                                         the
                                                                         plots
                on
       of  the
                                                                metric
                                    of
                            Sodium
                                                                                     temperatures
                          solution
                                needs.
                                                         log
                                                                     surface
                the
                                         Conversion
                                                                                          Formation
                                                temperature
                              temperature
                                    any
                                                                       assumed
                                                                case
                                to
                                       Ry  at  Formation
                                                                  temperature
                                                                             depth
                                  temperature
                                                                                                        formation
                        of  solutions
                log
                                                                  of
                                be
       solution
                                                                               {
                            chloride
                                              temperature
                                                           :
                                    ionic
                                         of Rang
                                                    ,
       in
                              before
                                                                      linéar
                                                                would
                                                         heading,
                                                gradient
                                              at
                                                                         temperature
                              it
                                                                  70°F
                         resistivity  in
                                                                be
                                                in
                                  incteases.
               heading
                                                                        (in
       ppm
                                                                    temperatures.
                              can
                                              9565
               to
                                                                  and
                       of  different
                         Q-m
                                converted
                           ‘solutions
                                      Temperature
                                              ft,
                                                                  a
                             be
                                                                20°C
                                    solution
                                                                        both
                         is
               be
                                                                             ‘temperature
                                                                                                            equation
                                  Thus,
       NaCl.
                                                °F/100
                               to
                                                                                                            is
                                                        bottomhole
                                                                        °F
                                                                and
                                                                    A  good
                                                                      temperature
                                                ft.
               0.08
                             used
                                  2,7
                           behave
                             as
               at
                                 a8
                                                                        and
                                                      temperature
                         plotted
                                                                  gtadient
                                                                            gradient.
                                    decreases
                           as
                                                      of
                                                                    average
                                                                        °C)
                                                                  of
                       concentration
               75°F.
                                    in
                               downhole
                                                                                                           follows:
                                                                      gradients
                                                                1.8°C/100
                         against
                                   a
                                                                  1°F
                                                        temperature
                                                                                       surface
                                                      70°F
                                                                    case
               Use
                           shown
                                 measured
                                                        at
                                                                    is
                                                                m.)
                       (ppm
                                                      is
                                                                        against
                                                                      and
                             a  parameter
                                                        a
                                                                  per
                                 at
                           in
                                                                    to
                             in
                                                                  ft.
                                                                                  be
                             the
                               conditions
                                                                        depth
                       NaCl).
                                                        depth



                           figure
                         temperature
               figure,9.11
                                 surface
                             SP
                                   predictable
                               at
                                                                  (The
                                                                    assume
                                                      assumed,
                                                                                  cal-
                                                                      assumed
                                                                        for
                                                        of
                                                                                       bottom-

                                                                Depth,  Thousands  of  Feet  .   using   culated   may   temperature   formation   Alternatively,   are   sufficient.   data  log   header   Usually   extrapolation.  by   simple   hole   and  from   estimated  may  be   temperature   Formation   Temperature   Step   R,,  value.  to  an   temperature   2,  at   formation  6.   Convert   R,,.  5.   Compute   from  the  SP.   Ryife/ Rive  tatio  the  4,   Compu
                                                                                                        ole
                                       Annual  Mean
                                                                                                        50
                                      Surface  Temperature
                 2
                          An
                  2
                                                                                                        75
                                 FIGURE
          where
      formula
                        formula,
          R,
                                 9.10
      as
                 (Ty
          is
                                                                                                        -
                                                                                                          -
        example,-the
                +
                        which
                                                                                                            .       9.  THE  SP  LOG
          the
                7)
                                                                                                        100
                  RED
                          approximation
        data
      follows:
                  |
                                         200
                          to
        of
                        states:
                          the
                                                                                                          Temperature,
                                 Temperature  vs.
                                      Temperature,
          solution
                                      °F
                          chart
        question
                                                                                                        ©  125  150   °C
                                 Depth.
                                         250
                          in
        #9.3
          resistivity

                :
          at
                                 Courtesy
                          figure
        could
                          9.11
                a
        be
                                         300
                          is
          temperature
                                 Schlumberger
                          given.
        applied
                ,
          7,
        to
                          by
                                         350
        the
                          the
          (°F).


                                        {
        Ar
                                                                Depth,  Thousands  of  Meters           175
                                Well  Services,
          For
                          Arps
        s
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