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| | 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 = 5-5 |
− | | topg = 5-64 | + | | topg = 5-5 |
| | 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 |
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| ==Hydrostatic pressure== | | ==Hydrostatic pressure== |
− | Normal hydrostatic pressure is the sum of the accumulated weight of a column of water that rises uninterrupted directly to the surface of the earth. Normally pressured fluids have a great degree of continuity in the subsurface through interconnected pore systems. Abnormally pressured fluids can occur where fluids are completely isolated in containers (compartments) that are sealed on all sides. | + | Normal hydrostatic pressure is the sum of the accumulated weight of a column of water that rises uninterrupted directly to the surface of the earth. ''Normally pressured fluids'' have a great degree of continuity in the subsurface through interconnected [[pore systems]]. ''Abnormally pressured fluids'' can occur where fluids are completely isolated in containers (compartments) that are sealed on all sides. |
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| ==Hydrostatic mud pressure== | | ==Hydrostatic mud pressure== |
− | The geological definition of “hydrostatic” differs from the engineering definition. Engineers use “hydrostatic” to refer to the pressure exerted by the mud column in a borehole at a given depth. Hydrostatic mud pressures are found on DST (drill-stem test) reports and on scout ticket reports of DSTs. | + | The geological definition of “hydrostatic” differs from the engineering definition. Engineers use “hydrostatic” to refer to the pressure exerted by the mud column in a borehole at a given depth. Hydrostatic mud pressures are found on [[Drill stem testing|DST (drill-stem test)]] reports and on [[scout ticket]] reports of DSTs. |
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| ==Properties of hydrostatic pressure== | | ==Properties of hydrostatic pressure== |
− | Normal hydrostatic pressure has the following properties:<ref name=ch05r5>Dahlberg, E., C., 1994, Applied Hydrodynamics in Petroleum Exploration, 2nd ed.: New York, Springer-Verlag, 295 p.</ref> | + | Normal hydrostatic pressure has the following properties:<ref name=ch05r5>Dahlberg, E. C., 1994, Applied Hydrodynamics in Petroleum Exploration, 2nd ed.: New York, Springer-Verlag, 295 p.</ref> |
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| * Amount of pressure increases with depth. | | * Amount of pressure increases with depth. |
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| ==Static vs. dynamic fluids== | | ==Static vs. dynamic fluids== |
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− | [[file:formation-fluid-pressure-and-its-application_fig5-1.png|thumb|300px|{{figure number|1}}See text for explanation.]] | + | [[file:formation-fluid-pressure-and-its-application_fig5-1.png|thumb|300px|{{figure number|1}}Balanced and unbalanced pressures.]] |
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| Fluid pressure is nondirectional if the fluid is static. If a pressure imbalance exists in any direction, the fluid moves in the direction of lower fluid pressure. The diagrams in [[:file:formation-fluid-pressure-and-its-application_fig5-1.png|Figure 1]] illustrate balanced and unbalanced pressures. | | Fluid pressure is nondirectional if the fluid is static. If a pressure imbalance exists in any direction, the fluid moves in the direction of lower fluid pressure. The diagrams in [[:file:formation-fluid-pressure-and-its-application_fig5-1.png|Figure 1]] illustrate balanced and unbalanced pressures. |
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| [[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]] |
| + | [[Category:Treatise Handbook 3]] |