Okla. Stat. tit. 52, § 52-549.5: Oil and gas commingling

COMMINGLING

If oil or gas in which there exists more than one oil and gas

lien is commingled with other oil or gas in such a manner that the

identity of the specific oil or gas is lost, then the oil and gas

lien continues without interruption into and attaches to any such

resulting commingled product and is perfected automatically as of

the date of its original perfection but only as to volumes out of

the commingled product equal to the volume of product to which the

oil and gas lien originally attached. In such event, the oil and

gas lien in the commingled product has priority over any security

interest or other lien that is not an oil and gas lien or permitted

lien, whether or not the security interest or other lien has been

properly perfected. If more than one oil and gas lien attaches to

the commingled product, then the oil and gas liens rank equally in

the proportion that the respective sales prices secured by each oil

and gas lien bears as a percentage of the total of the sales prices

secured by all oil and gas liens applicable to the production at the

time the production was commingled. This section is intended to

recognize the continuation of oil and gas lien rights of an interest

owner in the commingled product stream only as to a volume of oil or

gas proportionate to the volume of oil or gas that originated from

such interest owner, with that volume of the commingled product

being considered to have maintained a distinct identity as being

available for sale or transportation under the specific contractual

arrangements applicable to the production at the time it entered the

commingled product stream.