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Line 37: + + + − * <table-wrap id="ch05utbl16a" position="float"> <table frame="hsides"> <colgroup> <col align="center"></col> <col align="left"></col> </colgroup> <thead> <tr> <th align="center"> Step </th> <th align="center"> Action </th> </tr> </thead> <tbody> <tr> <td align="center"> 1 Pick a depth above or below the measured point. </td></tr> <tr> 2 Multiply the difference in depth by the buoyancy pressure gradient. </tr> <tr> 3 Add the number from step 2 to the measured pressure if the depth is deeper; subtract if shallower. </tr> </tbody> </table> </table-wrap>+ + + + + − + − + − |- − | 1 − | Pick a depth above or below the measured point. − |- − | 2 − | Multiply the difference in depth by the buoyancy pressure gradient. − |- − | 3 − | Add the number from step 2 to the measured pressure if the depth is deeper; subtract if shallower. − − '''Example:''' − − Measured pressure at [[depth::7607 ft]] is 3530 psi and buoyancy pressure gradient is 0.076 psi/ft. What is the hydrocarbon pressure at 7507 ft? − − '''Solution:''' − − 7607 – 7507 = 100 ft − − 100 ft × 0.076 psi/ft = 7.6 psi − − Hydrocarbon pressure at [[depth::7507 ft]] = 3530 psi – 7.6 psi = 3522.4 psi − − <tr><td align="center">5</td><td align="left">Plot the pressure number from step 4 on the pressure–depth plot and draw a line between this point and the measured pressure point. This line is the hydrocarbon pressure gradient.</td></tr>
Hydrocarbon pressure gradient: plotting (view source)
Revision as of 15:54, 30 January 2014
, 15:54, 30 January 2014fixed table
| 2
| 2
| Determine the hydrocarbon pressure gradient from one of two ways:
| Determine the hydrocarbon pressure gradient from one of two ways:
* Measured hydrocarbon density
* Measured hydrocarbon density * Estimates of hydrocarbon density
* Estimates of hydrocarbon density
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|-
| 3
| 3
| 4
| 4
| Determine a pressure above or below the measured depth point. The table below lists the steps for determining this number.
| Determine a pressure above or below the measured depth point. The table below lists the steps for determining this number.
# Pick a depth above or below the measured point.
# Multiply the difference in depth by the buoyancy pressure gradient.
# Add the number from step 2 to the measured pressure if the depth is deeper; subtract if shallower.
'''Example:''' Measured pressure at [[depth::7607 ft]] is [[pressure::3530 psi]] and buoyancy pressure gradient is 0.076 psi/ft. What is the hydrocarbon pressure at [[depth::7507 ft]]?
'''Solution:'''
* 7607 ft – 7507 ft = 100 ft
* 100 ft × 0.076 psi/ft = 7.6 psi
* Hydrocarbon pressure at [[depth::7507 ft]] = [[pressure::3530 psi]] – [[pressure::7.6 psi]] = [[pressure::3522.4 psi]]
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|-
| <th align="center"> Step</th>
| 5
| <th align="center"> Action</th>
| Plot the pressure number from step 4 on the pressure–depth plot and draw a line between this point and the measured pressure point. This line is the hydrocarbon pressure gradient.
|}
|}
==See also==
==See also==