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-   studies,   The   The   LOG   For   FIGURE       LDT   FDC   SNP   Dual   CNL   GR   MLL.   MSFL   DLL   IES   DIT   ISF   Log   ‘   I.

         study
                                                   NGS
           (1973).
                                                                            -
               need
                                                                    Neutron
                                                                     Porosity
                                                                              Proximity
                              further
                                    5.19
                                                                                           .               BEFORE   ‘SUMMARY   METHODS
         results
             such
                                  Schlumberger
                                                   _       LL              GR   4                                    OF
               for
           Table
                     QUALITY
             as
                                                         LU
               log
           5.2
                                                                       .   NRAT   MLL   PROX   CMSF   LLD   LLS   16”  N   ILD   ILD   ILM   SFL   ILD   Curve   AND   OF
                            Control  (Bateman
                                                      SS1
                                                    SS2
                                                                SNP
                              details
                                                        LITH
         show,
                  Need for  Log
                                                               FFDC
                                                                     NRAT
                                                                  FECN
             the
                                                             NFDC
                                                                    NECN
                                               W3NG
                                                 W2NG
                                                   WING
                                            W5NG
                                              W4NG
                                                                                                :
                                                        |.
                              on
                                    Calibration
                                                                                                  —       AFTER      GATHERING
                                                                  _.  CPS   CPS   ‘  +  0.04   RATIO   me   +  0.04   RATIO  .   #15  CPS   +1  +15   MMHO/M  —   +4   #15-   MMHO/M   MMHO/M  +2  +  20°   +.  20   MMHOIM  -   #20   +  0.7  2M   +  07  QM   +0.08  +  1.05  QM   +2  +20   MHO/M   +2  +20   MHO/M-   MHO/M  +2  +20   +2  +20   MHO/M   +20   MHO/M  #2   Zero  Plus  Units   Tolerance   Tolerance’.   SUMMARIES   TOLERANCES       FORMATION   EVALUATION   DATA  93
             one
         poor
                            1985).
                                  Well  Services.
               quality
                              log
                     CONTROL
             by
         log
                  Quality
           summarizes
               control
           the
                                    .Tolerances
             Neinast
         quality
               has
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                                                         +
                                                    +
                              calibrations
                                                      +
                                            +
             and
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                                                           +4
                                                         4
                                                             +22
                                                                #13
                                                              +14
           results
                                               +6
                                                   6
               been
                                            20
                                             +20
         control
                                                      0.5
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                                                    0.5.
           of
                                               °°.
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         can
             of

           their
                                    (Schlumberger
                                                                                                             BETWEEN
                                            %
                                             °.°.%
                                                 %
                                                   %
                                               %
                              refer
                                                         CPS
                                                           CPS
                                                      CPS
         result
                                                        CPS
                                                                CPS
             Sun
                                                              CPS
                                                             CPS
                                                    CPS
                              to
         in
               documented
             Oil
                                    Logs).
         a
           studies.
               in
                              Log

           As

         large
         per-
           these
               various
             Company
                                    Courtesy
                              Quality



                                             If
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                            of
                                    be
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                                                                      the
                                                                    the
                                       go
                                                              time.
                                  No
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                                                                                             Verden
                            the
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                      quality
                                                                                      Source:
                                                                  during
             quality
                                                       After
                                                                                                   Sonic
                                         smooth
                                                                bottom
                                                            tracted.
                                             there
                                                                                 centage
                                                                          logs
                                                                  a
                                                                                                 Density
                                                                                                       Density
                                                                                           Density
                          objective
                        company
                                                                                               Neutron
                                                                             It  is  the
                                                          minimum
                                                                               recording
                                                 formation
                                             is
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                                                              Even
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                                                   responses,
                                                                                                         Induction
                              this  degree
                          is
                                                                      logging
                                                                    logging
                                                                                 of
                                                                                                     Upper  Valley
                                                                                                 }
                                                                                             Field,
               Calibrations
                                  matter
                                                 in
                                       in
                                                       each
                                                            Give
                                               done  after  the
                                                                               the
           depth-related
                          to
                                    impossible
                                are  ways
                                                                                           errors
                                                                                                       errors
                      control
                                             any
                            logging
                  Practical  Log
               are
                                                                                      Reprinted
                                       the
                                                 the
                                           crew
                                                                                 logs
                                                            the
                                                                                                         errors
                                                                                                 logs
             available.
                                    to
                                                                                                     Field,
                                                                  logging
                                                                          obtained
           log
                                                                               logs
                                                                                                   .
                                                                                                 in
                                                              the  best
                                                                                         0.02
                                                                                                       0.01
               the
                                                                                           0.01
                        personnel
                                    get
                                                       log.is
                                           rigs
                                                                          are
                                                                    engineer
                                                                                                         -10
                                       hole
                                                                                                     Utah
                                                                      operation.
                                                                                             Oklahoma
                                                   equipment
                          develop
                                         hole  should  be
                                                                of  the  well.  Do
                                                          interruption.
             Learn
                                                                        expect  a  representative
                                                                                 being
                                                                                                 error
                                             question
                  Quality
                                                                                         g/cc
                                                                                           g/cc
                                                                                                       g/cc
                                               first  print  is
               only
                        with
                                       after
                                                                not
                      procedures
                                                            engineer
                                                                                 in
                            company’s
                                                                  operation
                                                                          of the
                                                 “remarks”
                                                                                                         mmho
                                           down.
                                                                    before
                                                            a
                                  how  competent
             what
                                                                             function  of the  well
                                    another
                                                              engineers
                                                                                     by  permission
                                                                  is
                      are
                                                   failure,
                                                                      Logging
                                             about
                                                                          best
                                                       complete,
                                                                    and
                                  and
                                                     thoroughly  as  possible.  Ask  for  an
                        whom
                  Checks
           measurements
                                                   or
                                                                                 error.
             they
                                                                                                       46%
                                                                                           36%
                                                              may
                                      rigging
                                                                                               33%
                                                                                         15%
                                                                                                 25%
                                                                                                   23%
                                                                                                         46%
                                                                distract
                                                                                     of  the
                              log  quality  also  depends
                                in  which  bad  logs  can
                                                 column
                                                                  when
                          relationships
                                                            chance
                            engineer.
                                                                    after
           will
               completely
                        you
                                                                the
                                           Generally
                              on
                                                   hole
                                    resistivity
                                                            to
                      available
                                             validity,
                                                                          quality.
                                                                  the
             mean
                                                              make
                                                       discuss
                                      down,
                                                                    the
                                                                        to  be  available-and
                              the
                                                 of  the
                                                                      operations
                      in
                                         enough  to  verify  the
                                           200
                                                       it
                                                                  tool
                        work.
             and
                                           ft
                                      but
                                                     explanation
                                                                    job.
                                                 log
                                                                                     SPWLA  from
                          of  mutual
                                    survey
                                                                                 Frequently,
                            Perhaps
           include
                                        log.
                                                                  is
                                                                logging
                                  conscientious
               objective
                                                                        in  the
                                                            perform
                                           of
                                             request
                                                       with
                                                                      should
                                                   problems,
                                                                    The
             how
                                  an
                                             a
                                      once
                                                                                                   100%
                            the
                                                                                               56%
                                                                                 the
                                                                                                         81%
                                                                                                       61%
                                                                               render  them  useless  as  formation
                                                                                          43%
                                                                                         26%
           one
                                                                                                 78%
                      Bateman
                                                           the
             to
                        Further
                                    of  any
                                                                      be
                                                                                     Neinast
                                                                  within
                                                       the
                                                   and
           or
                                                 heading.
                                           repeat
                                                              mistakes  when
                                                                    most
                                      pipe
                          trust  with
                                                                        logging
                                                                engineer
             use
                            most
                                                                            operator’s  representative  to
                                                                                     and
                                             rerun
                                               made  but  before  any  more  prints
                                           in
                                      is
                                                                                 errors
                                                                                                          :   Texas  .   Big  Wells  Field,       Schlumberger   Dresser  Atlas  Welex       of Log   Quality  Study  by  Sun  Oil   TABLE  5.2   Results   5.   WIRELINE   LOGGING   OPERATIONS
                                    type.
                              competence  and
                                                                  1000
                                  observer
                      (1985).
                                             of
                          the
                                                 This
           more
                        details
                                                   enter
               verifications
                                               are
                                                                  ft
                                      set,
                                                     of any  abnormal
                                                                                     Knox
                                                              they  are
                                                           operation
                                                                    critical
             them.
                                             the
                                                                during
                                                                            ensure
                        of
               of
                                                   the
                                                       engineer
                                                                                               _—
                                                                                                —
                                                                                                  _
                                                                                 made.
                                                                                         33%
             T'
                                                                                          58%
                                                                                                       70%
                                                                                                        67%
                                                                                     1973.
             he
                                                                              evaluation  tools.
                                                     curve
                                      it  wil!
                                                                                in
           repeat
                                                             dis-
               log
                                               made.
                                  may  be,
                                                   in-
                                           relatively
                                        Everyone  is  reluctant
                                                 may  be
                                             log
                                defy  detection  at  the  wellsite.  To
                          logging
                        log
                              integrity
                            important
                                                       as
                                                                          Service-company  personnel
                                                                        unit  during

                                                                            that
                                                                      discussed  with
                                                                this
                                                           with
                                                                    time
                                                                  of  the
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