Page 300 - Origin and Prediction of Abnormal Formation Pressures
P. 300

FEET1
                                                            ABOUT
                                                                         I]
                                                           NO-UONTMORILLONITE
                                                              10,000
                                                            LEVEL  (USUALLY
                                                              TU
                                                              9,000
                                               HYDROCARBONS
                                                                         LAYER
                                                MADE
                                                 N  THIS
                                                  BUT  NO
                                                OR
                                                 AVAILABLE
                                                                         MlXEO
                                                FORMED
                                               MOST
                                                  ZONE
                                                                         ILLlTE
                                                                             y  KAOLlNlTE   AND  ILLITE  Fig. 10-28. Compaction history of  various clays when deposited in marine environments and its probable relation  to the release of hydrocarbons from mudrocks.   .)  (Modified after Powers,  1967, fig. 3, p.  1245. Courtesy of American Association  of Petroleum Geolo
                                                                             n
                                                                         CURVE
                                                                         WATER-ESCAPE   MONTMORILLONITE
                                                                             mi
                                                                         1-1
                                   OF   POSITION   CANNOT   BY   AS   TO   ALTERS   IS  BONED  BETWEEN   DESORBEO   FREE   FLUSH   THEN   SEDIMENT
                      REMARKS      MONOLAYERS   BONDED  WATER   INTERLAYER  MONTMORILLONITE   OUT   PRESSURES.   THAT   WATER   LAYERS  IS  AWTRANSFERRED  AS   INTERPARTICLE   OVERBURDEN   CAN   THE   FROM   AVAILABLE   WITH
                                   SEVERAL   HYDROGEN   IN   HELD   IN   SQUEEZED   BE   COMPACTION   MONTMORILLONITE   ILLITE.   HYDROGEN   UNIT   TO   WATER   POSITIONS.   PRESSURES   WATER   ALONG   HYDROCARBONS
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