OPTIMIZING WATER SUPPLY

NORTHWEST FISH CULTURE CONFERENCE2004 Annual Meeting

NORTHWEST FISH CULTURE CONFERENCE2004 Annual Meeting

WELL PERFORMANCEOPTIMIZING WATER SUPPLY

WELL PERFORMANCE

Why Good Wells Go Bad?

Wells under stress

Poor well DevelopmentBacterial & Microbial growth Improper pump placementWorking too hard or over-pumping!

Well Development

Biological Fouling

Improper Pump PlacementImproper Pump Placement

submersible pump

SWL

PWL

Accelerated Biofouling & Mineral Encrustation

Over-pumpingOver-pumping

PWL

SWL

submersible pump

Reasons for Declining Specific Capacity

Well ConstructionWell DevelopmentBacterial Plugging of the Screen, Gravel Pack or AquiferOperations

Why Preventive Maintenance?

„Life“ Time„Life“ Time

Specific Capacity inSpecific Capacity inm³/h/m m³/h/m

+

Without Preventive Maintanence

With Preventive Maintanence

Preventive Maintenance

Monitoring Monitoring

Periodic InspectionPeriodic Inspection

RehabilitationRehabilitation

EvaluationEvaluation

Monitoring

0

5

10

15

20

25

Spec

ific

Capa

city

(gpm

/ft/d

d)

New Well

4.7

2.6

7.8

5.1

11.5

7.0

3.92.8

3.72.8

18.6

25

1972 Aug 97Aug 971994199219911988198419801976 Oct 98Jun 98

Periodic Inspection OpportunitiesNew Well Construction

Periodic Monitoring

Identify Problem

Well Rehabilitation

Well Rehabilitation Techniques

ChemicalMechanicalImpulse Generation

Chemical Treatment

Dispersants

Cold Acids and Bases

Hot Acids and Bases

Antibacterial Agents

Mechanical Treatment

BrushingSurging/SwabbingJettingFreezing

Impulse Generator- Compressed Gas

Impulse technology hydropuls®

flexible pres s ure tubing

hydropuls ® generator

impuls e area

working range of thehydro puls ® ge nerator

filte

rsle

ngh

Impulse Generator- Detonation Cord

Impulse technology Shockblasting®

detonation cord

impulse area

Current Well Rehabilitation Research

ChemicalMechanicalImpulse Generation

100

90

80

70

60

50

40

30

20

10

0

Na-dith

ionite

Ascor

bic Acid

Citric

AcidMalo

nic Acid

Sulfam

ic Acid

Sulphuric

Acid

Hydro

cloric

Acid

Oxalic

Acid

Sodiu

m

Hydro

xide

ferrihydrite 2L (309 m /ggoethite (93 m /g)

2

2

Chemical Effectiveness on Iron Oxides

Well Plugging

3 -6 inches

Research on Well Rehabilitation Technologies

Gerät

Hauptgruppe Untergruppe Messwert Graphischer Vergleich

1 2*10e-4

2 2*10e-4

WASSERHOCHDRUCK DOPPELROT.AGG 5*10e-3

KNALLGAS ---- 6*10e-3

IMPULSGENERATOR (pigadi) 3*10e-1

2 2*10e-3

WASSERKOMPRIMIERUNG ----

SPRENGLADUNGEN ----

1 4*10e-6

2 5*10e-6

DRUCKWELLEN-/IMPULS-VERFARHEN

LUFTKOMPRIMIERUNG

ULTRASCHALL

Mittlere Spez. Energieeintrag in der Filterkiesschicht in Nm

HOCHDRUCKSPÜL-VERFAHREN KEINE

Technologie gem. W 130

Rehabilitation Process

Bid specificationsAnalysis of well conditionsMechanical cleaningWell rehabilitation technologyBailing/ isolation pumpingFinal diagnosisWritten Report

4 “P’s” for Well Operation

1. Practical Long Term Monitoring

2. Proper Pumping Rate

3. Periodic Well Analysis

4. Preventive Maintenance

1. Practical Long Term Monitoring

2. Proper Pumping Rate

3. Periodic Well Analysis

4. Preventive Maintenance