U.K.-based Kazakh player Max Petroleum reported Friday that a “competant persons” audit of the reserves in its Kuzbak prospect suggest “risked” resources of 250 million barrels of oil equivalent.

A survey of 14 seismic profiles were shot derived from the southern stretches of the relevant acreage. Seismic was “pre-stacked, depth migrated to improve the sub-salt imaging of the structure,” a statement said, citing the report by consultancy Ryder Scott Co.

Risked resources imply using math to extrapolate the “potentially recoverable” from undiscovered resources.