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Lower Mississippi-Gulf Water Science Center -- Arkansas
Well Log Archive Database
Short Title: Well Log Database
Project Chief: Terry Holland
Cooperators: Arkansas Naural Resources Commission
Project Time Frame: 2005 - present
Arkansas water regulations require metering on ground-water withdrawals for all sustaining aquifers named by the Arkansas Natural Resources Commission (ANRC). Repercussions of these regulations have resulted in ground-water users contesting the aquifer in which their wells are screened. As a result, the agency responsible for enforcing the regulations requires a quick, reliable method to determine the primary aquifer of a well given the location and depth. A well log archive database with web base capabilities that incorporates opens-source, interactive map capability was designed to automatically select the proper aquifer. The user selects the well location on the map and enters the well depth or screened interval information. Next, the 3D surfaces of the formation tops are queried, the stratigraphic column for that location is created, and the aquifer name is identified. The locations and images of nearby geophysical logs are also available from the web site.
The study includes the digital scanning of geophysical well logs and archiving relevant data from the well log documentation in an Access database. The well log archive database is being incorporated with the Water Use Database software to assign the aquifer codes to new wells registered by ANRC. Initial work began in several eastern Arkansas counties, and then in conjunction with the "Mississippi Embayment Regional Aquifer Study", all eastern Arkansas counties have been completed. Work continues in counties located in northwestern Arkansas. The location and depth to the top of aquifers and confining units as well as their respective thicknesses allow State agencies as well as the general public to gain insight for the management of ground-water resources.
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