Urgent plz!!

[yasiobasio123]

Hi Friends,

How I can find the Gas, Water and Oil gradients from Pressure-Depth plot?
What is the method to calculate the Densities of these fluids?
And similarly how we can determine the Capilary pressure (Pc)?

Please reply asap, I will be very thankful.

Cheers, Yasio

[barryn56]

Fluid gradients are simply the pressure change versus depth. For example, 1 gram/cc density is 0.433 psi/ft (1.42 psi/m). So on a pressure-depth plot simply choose two pints on a line and find the difference in pressure divided by the difference in depth at those two points. This is the gradient. Water should have a gradient around 0.433 psi/ft, oil around 0.3 psi/ft and gas 0.1 or so. Densities are just a conversion factor applied to these numbers to give you the density units you require. Capillary pressure can be determined from core measurements - an estimate can be got from the difference between oil water contact on logs and the free water level from formation pressure measurements.

[NESTIN]

Revisar cualquier book sobre HIDROSTATICA, te sera de mucha ayuda.
Saludos;

[NESTIN]

Échale una mirada:

[link Point to another website Only the registered members can access] Saludos;
NESTIN

[darcyoil]

Ditto, Nestin. And if you actually feel the need for software to do this work for you, try Fekete's Validata. Contact www/feket.com and they should give you this bread-and-butter tool at a v decent price

[darcyoil]

Sorry

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[ahmedm]

simple and free

from RFT, XPT, FMT,etc which are pressure vs. depth
plot pressure in x and depth in y
get the slopes, psi/ft
0.3 oil
0.433 water
gas low values, off course logs can help too, off set wells, production data

you can search google for further info
also you can have a look in RFT essentials slb

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hope this helps