need help about these questions

Well Test Analysis, Pressure and Production Monitoring........ etc.

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mohammed107
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Joined: Sat Nov 26, 2011 2:49 am

need help about these questions

Post by mohammed107 »

These questions were in a company exam and i need your opinion



1-when take surface fluid sample, what is the condition of choke (i mean increase or decrease opening)???

2-after a long production life from wet gas reservoir, there will be two phase flow . (yes or No and why????)

3-what is meant by "constant volume depletion" for gas reservoir??which gas reservoir type is recommended for CVD and when????

4-is sand production considered a well damage ???

5-what is effect of separator pressure on pipeline pressure???

6-Straight line IPR is better than Vogel IPR for the artificial lifting systems (Yes or No and why???????)

7-Pressure gradient curves affected by the well bore deviation. (Yes or No and why???)


8-gas lift is the most common artificial lift method in offshore. (Yes or NO)
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X880862531X
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Post by X880862531X »

I will try to reply on 2 of your questions, hoping that my words are close to the right answer :

# 1
I think that choke size affects accuracy of GOR & W/C

# 4
Do you mean formation damage ( skin ) ?, I think that sand flow with the produced liquid decreases permeability near perforations, reservoir engineers may give you better answer.
Sand production results in clean out workover jobs to remove sand from wellbore, may be by drilling it or circulating it with a pumped fluid or sand bailer is used. If a well is frequently needing sand cleanout, gravel packing may be better. Sand also may result in bottom hole pump damage.

[align=justify]I am not sure if there is any thing wrong in my words, we are waiting for replies from the other members.[/align]
mohammed107
Posts: 36
Joined: Sat Nov 26, 2011 2:49 am

Post by mohammed107 »

Thanks a lot Hosam
I hope more replies from other members
umair.shafeeq
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Location: karachi

Answers

Post by umair.shafeeq »

Mohammad,

I will try to answer these questions

2. after long production, wet gas reservoir produces condensate in wellbore or surface facilities, in reservoir there would not be any two phase flow...unlike condensate reservoir in which two phase flow occurs in reservoir.
4. Damage is a typical term used for Skin i.e reservoir damage. Sand production causes lift equipment corossion or in worst case hole fills with sand, restricts fluid movements..Wellbore cleanout job is required..Still i dont consider it a damage

7..Pressure gradient curves are not affected by wellbore deviations
mohammed107
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Post by mohammed107 »

umair.shafeeq

2-i know that wet gas reservoir (gas at reservoir and gas and liquid at surface )but what about water and gas flow after long production.

4-my opinion like yours, but read the last paragraph of this http://www.i.sereneenergy.org/i/Effects ... ction.html
mohammed107
Posts: 36
Joined: Sat Nov 26, 2011 2:49 am

Post by mohammed107 »

Thanks a lot umair.shafeeq
I hope more replies from our members
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