Aquifer storage and recovery (ASR) wells naturally clog after each injection cycle. Conventional methods for unclogging an ASR well are time consuming and costly. Estimates to conduct this type of rehabilitation would be $110,000 to $150,000 per year and the duration to complete this work would be about 30 to 45 days.
City of Phoenix’s ASR Well #299 has implemented a new well development methodology that is efficient, cost effective, and utilizes the permanent pump and motor system. Due to programming logic controls, Well #299 can easily transition from recharge to well development (radial injection surge development) to recovery modes. Annual well development (radial injection surge development) between recharge and recovery modes is critical for maintaining optimal operational rates for both recharge and recovery, which ultimately extends the life cycle and reduces long-term operational and maintenance costs. This presentation summarizes how to unclog an ASR well utilizing the radial injection surge development method and achieving 100% recovery of production and injection rates.
This presentation should follow “City of Phoenix, Aquifer Storage and Recovery Well #299: “Why Is Programming Critical for ASR Operations?” by Nathan E. Nutter, P.E., Carollo Engineers; Gary M. Gin, R.G., City of Phoenix
| Gary M. Gin, RG , City of Phoenix | |
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Gary Michael Gin is the City Hydrologist for Phoenix, and is currently working on implementing and operating Phoenix’s first Aquifer Storage and Recovery wellfield. He received a bachelor’s degree in Geologic Science (with distinction) from Sonoma State University in California, and earned a master’s degree in Geological Sciences from the University of Nevada, Las Vegas. Gin is a Registered Professional Geologist in Arizona and Texas with 14 years of experience in water resource development, management, and optimizing wellfield operations. |
| Nathan Nutter , Carollo Engineers, Inc | |
| Nathan Nutter has 11 years in the water resources industry. His focus is in water resource management, specifically through the use of aquifer storage and recovery wells. Nutter graduated from Stanford University and has professional licenses in Civil and Mechanical Engineering. He has worked for Carollo Engineers for six years, during which he has designed and overseen construction for numerous well sites around the state. Nutter’s presentation will focus on the benefits of strategic programming in an ASR well application. | |
| Tom Morris , ASR Systems LLC | |
| With 15-years at the Las Vegas Valley Water District he installed 80 deep groundwater wells and assisted in managing the maintenance and operation of 108 groundwater production and recharge wells with an injection capacity of over 100 million gallons per day and production capacity of close to 160 million gallons per day. With ASR Systems he has evaluated and re-designed injection systems for NASA JPL and JSC, prepared horizontal directional well drilling programs, designed a 13 million gallon per day recharge and recovery wellfield and distribution piping, and helped develop the national standards for recharge technology for the AWWARF. | |
