Cub Energy Inc, a Black Sea region-focused upstream oil and gas company, announces that the S7 zone in the Makeevskoye-17 (“M-17”) well tested gas at a rate of over 0.9 million cubic feet per day (“MMcf/d”) through a seven millimetre choke.
The M-17 well is operated by KUB-Gas LLC, a partially-owned subsidiary in which Cub has a 30% effective ownership interest through its 30% shareholding of KUBGAS Holdings Limited.
Makeevskoye-17 Well
In March 2014, Cub announced that wireline logs indicated 9 metres of net gas pay in the S6, 2.5 metres of net pay in the S5 carbonates, and resource potential in the R30c and S7 sands. The Company has not produced the S7 sand previously and thus Cub has no reserves for the zone. It was believed that the M-17 well’s 5.5 metres of net pay in the S7 would require stimulation to get a commercial flow rate from the zone.
Cub plans to perform a dual completion on the M-17 as a producer in the S6 and S7 zones, with the S7 producing unstimulated. Currently, the Company’s snubbing unit, required for dual completions, is performing operations on its O-4 well. The M-17 well will be suspended until the snubbing unit arrives on location. Once the subbing unit is on location, the Company will set a bridge plug above the S7, and will perforate and test the S6 zone, which is 45 metres above the S7 and the primary target of the M-17 well. The S7 discovery is still being considered for stimulation and remains in the Company’s fracture stimulation campaign scheduled for October this year.
Gas samples taken during testing indicate that the gas has a carbon dioxide (“CO2”) content of 8.8% and a heating value of 6,960 kilocalories per cubic metre (“kcal/m3”). While this is below the sales gas pipeline specification of 7,600 kcal/m3 and 2% CO2, it can be blended with production from the Makeevskoye and Olgovskoye fields and the resulting blend will meet or exceed all pipeline requirements. The Company is confident that the gas composition will not pose any material issues in development.
The M-17 well was drilled to a total depth of 3,475 metres to appraise the new pool gas discovery made in the S6 sandstone by the Company’s Makeevskoye-16 (“M-16”) well, which is currently producing at a rate of 3.9 MMcf/d (1.2 MMcf/d net to Cub). The M-17 is located about one kilometre to the northwest of the M-16 well and within the same structural closure.
