Q&A No.711 - Wire Wrap vs Premium Stand Alone Screens For Water Injection wells

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1.  Historically "Internally and Industry Wide" Wire Wrap "WW" Stand Alone Screens "SAS"  are selected over Premium SAS for water injection wells

2.       Rushmore database shows that the overwhelming majority of subsea water injection wells are completed with WW SAS (SAS lengths varied from 100m to ~2200m see attachment below)

3.       Some operators has seen no benefits from the higher area open to flow offered by the P SAS, combined with a lower cost  of WW SAS the decision to use WW was made with ease.

4.       Certain literatures claims the WW screens are self-cleaning (Delattre et al., 2004) which is counter intuitive giving the fact that they offer a lower area open to flow.

5.       Some operators claims that Premium SAS provides a tortures path compared to WW screens which makes them more susceptible to plugging

We are planning several water injection wells where WW SAS are carried as the reference case based on offset data (points 1 and 2)

Recent cost compression showed WW would cost more !

Sand Retention Test will be carried on both screen types for compression

I am curious to know others views, experience, theories, behind the overwarming usage of WW SAS for water injection wells

 

Regards

Abdullah Eshtewi, Completion Engineer

Woodside Energy Ltd. 

asked Mar 18, 2016 in COIN by Abdullah Eshtewi (240 points)

1 Answer

+1 vote
Abdullah,

Please find below a response from Aart van Kranenburg of Shell:

We have historically used both however lately are moving more towards direct wrap screens as for same size of basepipe, they have much higher burst rating which is relevant as injector wells can typically plug from inside out (depending on source of plugging material which could be corrosion products or carry over from anything coming from topsides)

Secondly, more and more injectors are completed as very long HZSAS completion to create as much open area to injection as possible, as mechanical strength is typically higher for direct wrap screens (strength close to basepipe strength) compared to premium (weld around cartridge to basepipe  being weak point), allows more push capability to work down screens if hole conditions dictate (tight spots)

Sand retention for injector screens typically use cyclic tests to reflect injection-shut-in cycles. These tests typically show better performance in those conditions compared to production tests only test for same type of screens.

Plenty of suppliers who can offer direct wrap at competitive prices, main differentiator in pricing would be wire material selection and slot tolerance operator requires (measured through multiple passes along screen with photometric inspection).

Regards,

Aart van Kranenburg
answered Mar 21, 2016 by Fiona Curley (1,480 points)
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