Page 55 - 6685
P. 55

Thus, analytical calculations of oil put options in respect
          to elastic drive based on the use of the basic formula elastic drive
          and method of superposition. They are appropriate for surgical use,
          approximate prediction indicators of development.


               §3.3 MAIN HYDRODYNAMIC CALCULATIONS
                        UNDER SOLUTION GAS DRIVE

                  Solution gas drive is manifested in the oil reservoir when
          the main force that moves the oil layer on to the bottom-hole is the
          energy of the gas dissolved in oil.
                   Exploitation under the solution gas drive characterized by
          a low coefficient oil recovery. Therefore, this drive will develop
          are small-screened deposits, where creating a system maintaining
          reservoir pressure economically appropriate or impossible.
                   The  hydrodynamic  theory  of  oil  deposits  under  the
          solution  gas  drive  today  is  approximate  and  is  based  on
          assumptions:
                    1. The movement of oil and gas  have taken flat in the
          absence of the field of gravitational forces.
                    2.  Consider  the  horizontal  layer,  which  dissolved  gas
          reserves are taken evenly distributed and there is no possibility of
          accumulation of the gas cap.
                    3. Not captured surface forces between gas bubbles and
          oil.
                    4.  Accepted  thermodynamic  equilibrium  in  the  system
          “dissolved gas-oil”.
                   Analytical  solutions  are  approximately  listed  in  solder
          even assumptions.
                  Field  of  the  existence  of  this  drive  lies  below  the
          saturation  pressure.  Difficulty  hydrodynamic  calculations  under
          the solution gas drive are that while reducing the pressure below







                                         55
   50   51   52   53   54   55   56   57   58   59   60