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Well Head Composition


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#1 Rafiq

Rafiq

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Posted 31 July 2008 - 12:16 PM

I am a new member of the ChE focum.
I just learned HYSYS from SAIT. This is the first time I have been given an assignment to model a well head gas composition. My supervisor provides me the following information:
anticipated products from 3-phase separator:
gas 4.2 mmscfd
oil 1370 bbl/d
water 30 bbl/d
P 1500 psi
T 80F
I already know lot of experts of this forum helping out one who is new in this profession.
Please help me come out with a solution of possible gas compositions.

#2 JoeWong

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Posted 31 July 2008 - 07:44 PM

Rafiq,
Welcome...

First of all, what is SAIT ?

Interesting...Your supervisor requested you to model wellhead gas composition base on flow information without knowing present of component and distribution. Your supervisor really give you a difficult stuff.

Where the wellhead gas coming from ?

Step 1 : Obtain gas composition. You may refer to previous project dry gas composition OR refer to nearby field dry gas composition.

Step 2 : Change Pressure and temperature of this composition (just call it FEED) until you get 2 phases.

Step 3 : Split FEED in 2 phase separator

Step 4 : Copy Vapor to new VAPOR stream

Step 5 : Copy Liquid to new LIQUID stream

Step 6 : Generate a WATER stream

Step 7 : Connect VAPOR, LIQUID & WATER to a 3 phase separator

Step 8 : Set the separator temperature and pressure as required.

Step 9 : Adjust VAPOR, LIQUID & WATER flow to obtain required flowrate as you wish.

The result will be your required composition.

Hope the composition give you some luck. smile.gif

#3 Rafiq

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Posted 01 August 2008 - 09:16 AM

Thanks JoeWong, It's great to get your expert advice and mentorship.
SAIT stands for Southern Alberta Institute of Technology, a renouned polytechnic institute in Calgary, Alberta, Canada.

I am working on the guidelines you provided me and let you know and if you are also JW Haung, then thanks for your mail.

Sincerely,

Rafiq

#4 Padmakar Katre

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Posted 01 August 2008 - 10:30 AM

Dear,
Addition to Joe the only thing what you could get is either of the flow by adjusting the feed temperature and the flashing pressure. I hope that the configuration of your simulation model would be like you have a feed coming at certain pressure and temperature. Now I am not sure that weather you are heating your feed stream or not. If not then only one parameter you could vary is the pressure of the inlet line to 3-phase separator in order to obtain one of the flow. You could not have 3 flows as target values at the cost of one adjusted variable in Hysys. Another thing to add here is the separation in Hysys is 100% and the operation is with the zero degress of freedom so no variable you could give as specification. Waiting for your comments.

#5 JoeWong

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Posted 02 August 2008 - 04:46 AM

QUOTE (Rafiq @ Aug 1 2008, 10:16 AM) <{POST_SNAPBACK}>
Thanks JoeWong, It's great to get your expert advice and mentorship.
SAIT stands for Southern Alberta Institute of Technology, a renouned polytechnic institute in Calgary, Alberta, Canada.

I am working on the guidelines you provided me and let you know and if you are also JW Haung, then thanks for your mail.

Sincerely,

Rafiq


Rafiq,
Thanks. I wish you understand the given steps. Let works it out and response to Padmakar.

By the way, it is "JW Huang".




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