Kazakhstan-focused oil explorer Roxi has firmed up its estimate of reserves at its main Galaz prospect.Estimates for total gross proved recoverable oil reserves on the NW Konys field are 2.4m barrels, total proved plus probable are 7.5m barrels while there are 10.9m barrels including possible reserves. The group is awaiting government approval for the sale of a 40% interest to LGI for $15.6m. Once that completes, the company's net interests in the field will be 0.8m barrels of proven reserves, 2.4m of proven plus probable and 3.5m of proven plus probable plus possible."This represents the first of regular reserves upgrades to be completed by the company across its core assets, as our activity increases in 2010. This is a positive step and the various upgrades will give greater clarity to the quality of our asset base," chief executive David Wilkes said.