San Leon Energy performs vertical frac at Lewino-1G2 well in Poland
LONDON -- San Leon Energy has completed the flow back, testing and initial analysis of its first vertical hydraulic fracture stimulation of the Lewino-1G2 well on its 221,000-acre Gdansk W Concession in Poland's northern Baltic Basin.
This initial vertical frac was performed to test frackability and the flow potential of the lower Ordovician shale and to gather critical data necessary for future horizontal drilling and multi-staged hydraulic fracture stimulation, targeted on obtaining commercial flow rates from the Ordovician and Lower Silurian shales.
The frac was performed through a 4.5-m perforated interval, at a depth of 3,545.5 to 3,550 m, in the highly prospective Ordovician Caradocian shale. The frac pumped over 11,000 barrels of fluid and 95 tons of sand propant at an average of 120 bpm with a maximum pressure of 12,200 psi. This is the highest frac pump rate at pressure ever performed outside the U.S.
Approximately 25% of the frac fluid was recovered along with a small, consistent flow of burnable gas. The well flared gas on several occasions including initial opening of the well after the frac and following a shut-in period after approximately 20% of the frac fluid was recovered.
Based upon the significant amount of data collected in this first frac the Company is planning additional vertical fracs in Lewino-1G2 in the Ordovician, to include a re-fracing at the existing fractured zone. Design peer review work is on-going with several other experienced engineering firms in support of UOS' redesign, including APEX Engineering in the USA and Fenix in The Netherlands.
San Leon is also in talks with UOS to design, and execute immediately thereafter, fracs in a 1500-m horizontal section, which the company expects to unlock the potential of this play.
San Leon estimates ongoing operations to take place in early Q4 2013 subject to final design work and regulatory approvals. The Company has already contracted UOS for the additional work at Lewino as part of its ongoing services agreement.