4 replies to this topic

[anjumaziz]

1. We have a processing facility for the removal of condensate from raw gas and moisture contents. TEG based dehydration unit, three phase separators, storage of produced condensate and evaporation pond (90ft * 90ft) for produced water installed for the said purpose.
2. The gas and liquid coming from all  deep wells first pass through three phase separators to remove free liquid and condensate. Based on the retention time, the water coming with deep gas is first separated in three phase separators and then sent to portable water storage tank which then drained to evaporation pit while condensate separated in three phase separators sent to condensate storage tanks. Some portion of water settled down in condensate storage tanks as well, which is also drained from tanks to evaporation pond. At this stage some of condensate also drains along with water.
3. Currently, the daily production of produced water and condensate is about 265& 90 BBL.  
4. We are also going to drill water disposal well.
5. When an appreciable layer of condensate developed on surface of evaporation pond, we recovered the condensate manually and up-till now we have almost recovered about 1000bbl of condensate since 2011.
6. We need a safe way to handle this amount of condensate by installing any physical means i.e API oil water separator or anything else, however, problem is that
7. Condensate recovered from evaporation pit is

 

Sp. Gravity  0.8232

API. Gravity  38.57

Salts             1.1 PTB

 

While Condensate Collected in Storage Tanks

 

Sp. Gravity   0.820

API Gravity    41.06

1. Condensate separated in three phase separator and storage tanks is seems to be emulsified and API oil water separator what i have conatacted to vedors their equipment only favorable for passing through non emulsfied oil.

PROBLEM:

 1. Any way to improve the efficieny of three phase separator and that can handled emuslified oil for pure separation, in this case we can get the pure product in storage tanks

2. Crieteria or method for the selection of oil / Water separator that can fullfill our purpose (emulsified oil water) and we can diposeoff produced water free from oil

Edited by anjumaziz, 13 March 2013 - 05:37 AM.

[ankur2061]

anjumaziz,

 

I would ask you to study the possibility of installing a liquid-liquid cyclone separator downstream of your condensate storage tanks and / or produced water tank line going to the evaporation pond for bulk removal of condensate. Also study the possibility of combining the drain streams from the condensate and produced water storage tank and routing it to the cyclone separator.  A few pointers on cyclone separators

 

1. Cyclone Separators require a much smaller footprint compared to an API separator

 

2. Cyclone Separators have high pressure drops and require high inlet pressures for good separation efficiency. This makes it necessary to pump the inlet stream to the cyclone separator.

 

3. Since there are no moving parts in a cyclone separator they are virtually maintenance free.

 

Some links are provided for vendors who supply liquid-liquid hydrocyclones. You may contact them to get further information. They could even provide you a complete package solution for separation of condensate from produced water.

 

http://www.fmctechno...droCyclone.aspx

 

http://www.flsmidth....cloCleanSystems

 

Hope this helps.

 

Regards,

Ankur.

[Art Montemayor]

You should never have to be in a position where you have a hydrocarbon condensate in an atmospheric pond.   I think what you lack is a tank battery design & gun barrel tanks to deal with the hydrocarbon condensate produced.

 

Please review the atttached material.  Perhaps this can help get you out of this hazardous dilemma.

 Atmospheric Battery Vessels.pdf   1.53MB   102 downloads

 Basic Tank Battery Design.pdf   851.1KB   82 downloads

 GunBarrel Tank Example.pdf   119.45KB   105 downloads

 Circulating & Disposal Water-Oil System.pdf   2.45MB   109 downloads

[anjumaziz]

THX everbody for sharing information, i will go by all techinical advises and come back for your further valuable inputs.

 

Regards,

Anjum Aziz

Sr. Engineer Pricess

[shan]

Hi Anjum Aziz,

 

To break the oil/water emulsion, you may consider injecting demulsifier chemicals upstream the separator and/or install a heating/electrostatic condensate treater. 

 

I like your title "Sr. Engineer Pricess".  Please allow me to give myself a similar title "Jr. Engineer Priceless" just here and just for this moment.