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| Reservoir Pressure http://www.epgeology.com/general-discussion-f36/reservoir-pressure-t4269.html |
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| Author: | Nema [ Sun Sep 08, 2013 9:44 pm ] |
| Post subject: | Reservoir Pressure |
I have a question guys, The mid-point of the perforations as a depth reference of the reservoir is 2340.5. You can assume that the well is to be full of gas and use a gas gradient of 0.1 psi/ft. The density of fresh water is 8.33 ppg (pound per gallon). A normally pressured formation would have an approximate pressure gradient equivalent to sea water density of approximately 8.6 ppg. Can someone tell me what is the pressure of the reservoir and determine how over pressured the reservoir is compared to normal? Also please tell me what the density of the drilling fluid (mud) should be if we were drilling through this reservoir with an over balance of 200psi Tnx |
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| Author: | Karthik [ Tue Oct 01, 2013 3:06 am ] |
| Post subject: | Re: Reservoir Pressure |
Nema, The information is not enough to answer your question. Plz provide this details: What is the vertical thickness of the reservoir in (m) =....? Is this Exploration well or development well ...? If development, What is the current reservoir pressure = .....? If exploration what was the shale Pore Pressure from your seismic velocity at the base of reservoir....? Gas gradient = 0.1 psi/ft Fresh water = 8.33 ppg = 0.433 psi/ft sea Water = 8.66 ppg = 0.45 psi/ft Just a try: Reservoir depth is : 2340.5 m; Pressure at this depth (considering hydrostatic) = 3458 psi. Well is full of gas does not make any sense. specify the reservoir top and base...? |
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