Changes

  | part    = Critical elements of the petroleum system

  | part    = Critical elements of the petroleum system

  | chapter = Formation fluid pressure and its application

  | chapter = Formation fluid pressure and its application

  | frompg  = 5-1

  | frompg  = 5-61

  | topg    = 5-64

  | topg    = 5-62

  | author  = Edward A. Beaumont, Forrest Fiedler

  | author  = Edward A. Beaumont, Forrest Fiedler

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch05/ch05.htm

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch05/ch05.htm

#*<math>\mbox{V} = \left(\frac{\rho_{\rm w}}{\rho_{\rm w} - \rho_{\rm hc}}\right)\mbox{H}_{\rm w}</math>

#*<math>\mbox{V} = \left(\frac{\rho_{\rm w}}{\rho_{\rm w} - \rho_{\rm hc}}\right)\mbox{H}_{\rm w}</math>

#*Note: Use gas density where gas is expected and oil density where oil is expected.

#*Note: Use gas density where gas is expected and oil density where oil is expected.

# Make a gas or oil isopotential contour map using the formula for U where U = V – Z. The values for Z, the subsea elevation of the target aquifer, can be determined by simply overlaying a structure contour map on the water isopotential map and subtracting (see “Example” below).

# Make a gas or oil isopotential [[contour]] map using the formula for U where U = V – Z. The values for Z, the subsea elevation of the target aquifer, can be determined by simply overlaying a structure contour map on the water isopotential map and subtracting (see “Example” below).

# Locate possible accumulations of hydrocarbons in hydrodynamic traps by locating the areas of low gas or oil potential. Locations should make sense in context with all other geologic data.

# Locate possible accumulations of hydrocarbons in hydrodynamic traps by locating the areas of low gas or oil potential. Locations should make sense in context with all other geologic data.

[[file:formation-fluid-pressure-and-its-application_fig5-38.png|300px|thumb|{{figure number|1}}Map showing oil in a hydrodynamic trap (shaded area). Copyright: Dahlberg;<ref name=Dahlberg1994>Dahlberg, E. C., 1994, Applied Hydrodynamics in Petroleum Exploration, 2nd ed.: New York, Springer-Verlag, 295 p</ref> courtesy Springer-Verlag.]]

[[file:formation-fluid-pressure-and-its-application_fig5-38.png|300px|thumb|{{figure number|1}}Map showing oil in a hydrodynamic trap (shaded area). Copyright: Dahlberg;<ref name=Dahlberg1994>Dahlberg, E. C., 1994, Applied Hydrodynamics in Petroleum Exploration, 2nd ed.: New York, Springer-Verlag, 295 p</ref> courtesy Springer-Verlag.]]

The map in [[:file:formation-fluid-pressure-and-its-application_fig5-38.png|Figure 1]] shows oil in a hydrodynamic trap (shaded area). No oil could be trapped in the structure, represented by solid contours, without the aid of hydrodynamics. The bold contours with long dashes represent the isopotential of oil (labeled U₀). To make U_o contours, follow this procedure.

The map in [[:file:formation-fluid-pressure-and-its-application_fig5-38.png|Figure 1]] shows oil in a hydrodynamic trap (shaded area). No oil could be trapped in the structure, represented by solid [[contour]]s, without the aid of [[hydrodynamics]]. The bold contours with long dashes represent the isopotential of oil (labeled U₀). To make U_o contours, follow this procedure.

#  Subtract the structure of the target formation (Z) from the isopotential of water (V_o ).

# Plot the remainder at the intersection of the two sets of contours.

# Draw contours of the values.

| 1 || Subtract the structure of the target formation (Z) from the isopotential of water (V_o ).

| 2 || Plot the remainder at the intersection of the two sets of contours.

| 3 || Draw contours of the values.

==See also==

==See also==

[[Category:Critical elements of the petroleum system]]  

[[Category:Critical elements of the petroleum system]]  

[[Category:Formation fluid pressure and its application]]

[[Category:Formation fluid pressure and its application]]