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Gor Definition


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#1 hameed9184

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Posted 22 January 2019 - 06:18 AM

Dear All,

This is the first time that I write here , hope that it wont be the last , any way

I have attached to you simple sketch of existing degassing stage where the crude oil with associated gas fed to the First degasser (as you see in the sketch).

my question is regarding the GOR mention in the sketch , do I consider that that the GOR mentioned  at each stage it for the inlet to separator ?

more clearly , for the second separator (OP conditions : 85.3 PSIA & Temperature 100.4/127.4°F) , does the quantity of the gas outlet (P2) will be GOR X BBI or no ,

Does the GOR for each separator given is the quantity that associate the liquid bottom for each separator?

my understanding that the gas quantity represented in each stage , will be remove (even if not totally) from the top of the each separator.

so that for the new unit that need to be installed (Wet Crude Oil Treatment Unit) (outlet from the second existing degasser) has no gas quantity or even neglected quantity.

 

as you see , the quantities and operating conditions of the unit was represented as a table (as you see in doc 2,available technical specification).

 

hope that I can find an answer from you :)

 

 

 

Attached Files



#2 shan

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Posted 22 January 2019 - 01:43 PM

There will be more gas flashed out at the Wet Crude Treatment Unit because of lower pressure and higher temperature.



#3 Art Montemayor

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Posted 22 January 2019 - 03:35 PM

hameed9184:

 

You furnish a table of Gas-Oil Ratios and a listing of gas components.  But you fail to tell us:

  • Where does this information come from and for what reason?
  • What does it represent?  The gas composition of the first crude flash?  The second?  Or what?
  • The listing of the 3 stages of gas separation give GORs, but are these values after the adiabatic expansion of the crude from each pressure level?  Or is it before the expansions?  (You also fail to show the expansion valve in your sketch, as well as the required flow arrowheads that indicate the flow direction in such a simple sketch.  You can certainly do better!)  If you don’t show the expansion valves, how do we interpret the flow that goes to the “new unit”???  is it before the expansion valve at Separator #2 or after it?
  • What are the conditions for the “new unit”?  If you don’t know, how are we to know?

Basically, I think you are trying to tell us that there are 4 separations intended for the field crude oil:

  1. Separator #1
  2. “New unit”
  3. Separator #2
  4. Separator #3

Is the above correct?  In response to your specific questions:

  • My question is regarding the GOR mention in the sketch.  Do I consider that the GOR mentioned at each stage it for the inlet to separator?  I don’t know.  And the only way to find that out is to ask YOU.
  • More clearly, for the second separator (OP conditions : 85.3 PSIA & Temperature 100.4/127.4 °F): does the quantity of the gas outlet (P2) will be GOR X BBI or no?  Same response as above.
  • Does the GOR for each separator given is the quantity that associate the liquid bottom for each separator?  Same response as above.

Please read the attached document to get an understanding of how the GOR is interpreted in the real, oil producing world.  Are you an engineering student or a practicing engineer?  Please respond.  Your questions are very basic and can be easily answered locally.

 

Attached File  Gas-Oil Ratio Calculation - Texas.pdf   4.75MB   14 downloads



#4 hameed9184

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Posted 30 January 2019 - 10:22 AM

Mr ART Montmoyor, thank for your answer , here in below my responses,

 

1-These info came from RFQ send from a client (Missan Oil Company-Iraqi National Company)

2-The gas composition represent the first crude flash

3- The sketch that I did , basically I took the info from the Table

4-Concerning the number of the separator, yes

after the second separator (Liquid stream) will pass to wet crude oil treatment) where there will be dehydration and desalting of the crude oil using a dual frequency dehydrator followed by a desalter. note that the freen line is outlet from the second separator not the outlet before the second separator.

the content of the salt with crude oil will be less than 5 ppm.

5-I'm process Engineer (graduated in 2006), but actually working as proposal Engineer.



#5 hameed9184

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Posted 30 January 2019 - 10:24 AM

I forget to said that , I didn't answer you because I didn't know that you have commented the post I made

 

regards






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