Monitoring well performance

Monitoring SUEZ Production Well Performance

2016 AWWA PNWS Conference

Roger Dittus P.G.

May 6, 2016

Well efficiency decline is obviously a bad thing…

Increased pump lift

Pump design becomes “wrong”

wasted energy

lowered ability to meet demand

may become “permanent”

2 I Monitoring SUEZ Production Well Performance

May 6, 2016 PNWS AWWA

Monitoring well performance



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Fine-grained Sediments

with sand lenses

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C. Petrich

Interbedded sand, silt, clay

Mudstone

Conceptual Cross-Section (Regional Scale)

Shallow coarse-grained sediments and basalt

Volcanic

Rocks

4,000

2,000

2,000

4,000

0

Ele

va

tio

n (

fee

t)

W EMunicipal Domestic Municipal

Adapted from a cross section by S. Wood BSU Geosciences

Arsenic

Uranium

Concentration

> Primary MCL

= “not useful”

Decommission

Treat Fe/Mn

Re-drill

Decommission

Treat Fe/Mn

Re-drill

ASR

SUEZ “Well Op” tool helps us evaluate well performance

8 I

• SUEZ utility in New York modeled Well Op tool on original version of

“Well Watch” software developed under SUEZ R + i Alliance

• Well Op tool creates easily scalable graphs of SCADA system data

• Allows comparison of current/ recent well performance to previous

performance



Well Op tool



Well Op tool



Well Op tool



Reviewing well operation

12 I

80 feet

300 gpm

Airline problem



Reviewing well operation

13 I

550 gpm

80 feet50 feet

300 gpm



Pump & screens cleaned

Tracking well performance decline

14 I

SUEZ Clinton well




15 I

1,000 gpm 600 gpm

Pump

throttled




16 I

~30% decline



Evaluating effectiveness of maintenance

17 I

screens

chemically

cleaned



Evaluating effectiveness of maintenance



Identification of impacts from pumping wells

19 I

SUEZ Goddard well



Identification of well interference effects



Reduction in specific capacity due to influence of another pumping well



Well interference



Another example

23 I

SUEZ River Run well



Another example





Another example



Another example

• Well Op tool allows for an easy comparison of current to historic well

performance

• Can be more confident of need to perform well, pump, and

monitoring equipment maintenance

• Currently working to translate observations from Well Op Tool into

work orders in GIS-based asset management system

• In a nut shell: Current tool use = we look for a problem to fix

Summary



Always room for improvement



More advanced tool will be available soon



More advanced tool will be available soon



Thank you



Monitoring well performance

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