Caspian Sunrise takes third core sample from Airshagyl, Kazakhstan


ATYRAU -- Caspian Sunrise has announced that work has commenced on a third core sample taken from Deep Well A8 on the Airshagyl structure at its flagship BNG Contract Area.


Deep Well A8 was spudded in November 2018, with a target TD of 17,388.5 ft (5,300 m) and with two principal targets. The first in the Carboniferous, with an expected interval depth starting at about 14,107.6 ft (4,300 m), and the second in the Devonian, with an expected interval depth starting at about 17,060.4 ft (5,200 m).

On May 7, 2019, the top of the carbonate interval of interest was encountered at a depth of approximately 14,199.5 ft (4,328 m). 

At a depth of approximately 14,238.9 ft (4,340 m), there were several simultaneous indicators of hydrocarbons on the mudlog, including a significant increase in background gas and good oil shows indicated by florescence and cut testing on drill cutting samples from the well.  

The announcement on May 9, 2019, that drilling had reached a depth of 14,406.0 ft (4,391 m), should have read 14,252 ft (4,344 m).

Subsequent to the depth reached on May 9, a first core was collected at a depth of 14,258.5 ft to 14,271.7 ft (4,346 m to 4,350 m). A second core was collected over the interval 14,337.3 ft to 14,367 ft (4,370 m to 4,379 m). Samples analyzed from this interval also showed visible secondary porosity and oil staining.

On May 24, 2019, we announced that the preliminary analysis from the first two core samples showed them to be porous and oil and gas bearing.


After further analysis of the two sections of core we are pleased to confirm that the samples analyzed showed visible secondary porosity and oil staining. Fluorescence and hydrocarbon cut tests classified the hydrocarbon indicators as fair to good.

Currently operations are ongoing to collect an 18-m core from 14367 ft to 14425.9 ft (4,379 m to 4,397 m).

For the avoidance of doubt, we believe the first two samples are from the same interval, which is believed to extend across the full 58 km2 of the Airshagyl structure.

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