Tethys Petroleum Limited: Drilling Update
Sept 07. Marketwire
Tethys Petroleum Limited today provided an update on its drilling activities in Kazakhstan and Tajikistan.
Exploration well AKD01, which is the Company’s first “deep” well in the Akkulka Block (“Akkulka”) in Kazakhstan, is currently at a depth of 3,414 metres (11,200 feet) in what is interpreted to be the Triassic sequence. This well has targets in the Cretaceous/ Jurassic sequence and in the underlying Triassic sequence. Electric logs have now been run over the upper part of this interval and these logs have been independently interpreted. In parallel to the results of these logs, hydrocarbon indications were also observed during drilling.
Independent petrophysical analysis confirms the interpretation of moveable hydrocarbons in at least two zones in the Lower Cretaceous / Jurassic interval which may be oil and/or gas condensate. The large Urga gas condensate field (which lies to the south of the AKD01 well) in northern Uzbekistan produces from the Jurassic sequence in a similar structural position. Production testing is planned for these intervals once the well reaches total depth and it is planned to case this section prior to drilling ahead. Only after production testing can a definitive statement be made on the potential for commercial production of oil and/or gas from this well. Currently preparations are being made to clean the hole prior to running casing.
Oil and gas shows have also been evident whilst drilling the Triassic sequence, which is below the Jurassic sequence, but no significant reservoir intervals have yet been encountered. Now that these oil and gas shows have been encountered work is underway to evaluate the potential for deeper Triassic reservoirs and based on this the planned total depth for the well will be determined. The Triassic sequence is one of the major productive horizons in oilfields located in the Mangyshlak area to the south-west of Akkulka.
An independent resource report carried out in 2007 by McDaniel and Associates estimates that the deep structures in the Tethys licenses in Kazakhstan potentially contain up to 690 million barrels oil equivalent of un-risked mean prospective resources.