Legal Definitions - double-fraction problem

In the oil and gas industry, the double-fraction problem is a common issue that arises when a fractional interest owner conveys or reserves a fractional interest. This ambiguity occurs when it is unclear whether the owner intends to convey their entire fractional interest or only a portion of it.

Suppose an individual owns an undivided half interest in minerals and conveys "an undivided half interest in the minerals" to another party. It is unclear whether the individual intends to convey their entire half interest or only half of their half interest.

This ambiguity can lead to disputes and legal issues, as the parties involved may have different interpretations of the conveyed or reserved interest.