Designing Wells to Optimize Performance and Efficiency - ICWT

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Slot Size Selection • Sized to pass 10 to 20% gravel pack • Slot size more critical than % open area • Open area of 3 – 5% = 90+ % efficient • Entrance velocity of 2 – 4 fps = 90+% efficient (1) (1) (1) Modern Techniques in Well Design, Journal AWWA Williams, D.E.,Ph.D, 1985
Efficiency Case Study – Big Pine, CA Well #374 Well #375 1000 ft Depth : 450’ 450’ Diameter : 18” 18” Perforations : 260 - 440’ 260 - 440’ Slot Size: 0.080” 0.080” Screen Type : wire-wrap louvered % open area: 27% 5 %
Page 1 and 2: Designing Wells to Optimize Perform
Page 3 and 4: Pumping Well Terminology Cone Of De
Page 5 and 6: Critical Components in Designing Ef
Page 7 and 8: Select Samples for Sieve Tests
Page 9: Wt. % Finer (passing) 20-48 50-60 6
Page 13 and 14: Properly Designed Gravel Envelope &
Page 15 and 16: Damage Zone Repair Drilling Damage
Page 17 and 18: Predevelopment • Predevelopment c
Page 19 and 20: Collapse Due to Slot Plugging
Page 21 and 22: Swabbing and Circulating • Prelim
Page 23 and 24: Development by Swabbing
Page 25 and 26: Single Swab Development • Beginni
Page 27 and 28: Double Swab
Page 29 and 30: Final Development / Pump Developmen
Page 31 and 32: Final Development • Final Develop
Page 33: Rossum Sand Tester
Page 38 and 39: Specific Drawdown, s/Q 0.080 Well D
Page 40 and 41: Water Level in Pumping Well Well Lo
Page 42 and 43: Ground Surface Q Static Water Level
Page 44 and 45: Pumping Step Test Discharge (Q) GPM
Page 46 and 47: Data Discharge Drawdown Specific Ca
Page 48 and 49: Maintaining Well Efficiency • Inc
Page 50 and 51: 50 Physical Clogging
Page 52 and 53: Example of Energy Cost Case 1: New
Page 54 and 55: SUMMARY • The efficiency of the w

Designing Wells to Optimize Performance and Efficiency - ICWT

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