
Application of an Area-of-Review (AOR) Concept to the East Texas Field and Other Selected Texas Oilfields
Author(s) -
Warner,
Koederitz,
Laudon
Publication year - 2001
Language(s) - English
Resource type - Reports
DOI - 10.2172/777918
Subject(s) - injection well , water injection (oil production) , mile , petroleum engineering , radius , water well , injection site , geology , environmental science , mining engineering , completion (oil and gas wells) , groundwater , hydrology (agriculture) , engineering , geotechnical engineering , geodesy , computer science , computer security , biomedical engineering
The Underground Injection Control Regulations promulgated in 1980, under the Safe Drinking Water Act of 1974, require Area-of-Review (AOR) studies be conducted as part of the permitting process for newly drilled or converted Class II injection wells. Existing Class II injection wells operating at the time regulations became effective were excluded from the AOR requirement. The AOR is the area surrounding an injection well or wells defined by either the radial distance within which pressure in the injection zone may cause migration of the injection and/or formation fluid into an underground source of drinking water (USDW) or defined by a fixed radius of not less than one-fourth mile. In the method where injection pressure is used to define the AOR radial distance, the AOR is also known as the ''zone of endangering influence.'