Or. Admin. Code § 632-010-0170
The board, by order, may require the permittee of a well producing oil or gas to conduct periodic surveys of the reservoirs in the state that contain oil or gas or both. These surveys must be thorough and complete and conducted under the supervision of the department. Each survey must address the condition of the reservoirs containing oil or gas, or both, and the practices and methods employed by the permittee. Such investigation must include, but need not be limited to: the volume and source of crude oil and natural gas; the pressure of the reservoir as an average; the areas of regional or differential pressure; stabilized gas-oil ratios; and the producing characteristics of the field as a whole and of the individual wells within the field.
Or. Admin. Code § 632-010-0170
Stat. Auth.: ORS 520
Stats. Implemented: ORS 520.095