Horizon Petroleum Advances Lachowice 7 Gas Well Workover in Poland
Mechanical work is complete at the southern Poland well, moving Horizon Petroleum toward re-perforation, acid stimulation and production testing of the Upper Devonian reservoir.
What Readers Should Know
- Horizon Petroleum has completed the mechanical phase of the Lachowice 7 gas well workover.
- The company recovered the downhole packer and completion equipment installed before the well was suspended in 1999.
- More than 200 m³ of completion fluid was lost to the formation during the operation.
- Natural gas entered the wellbore during the workover and was controlled and cleared.
- Horizon plans to re-perforate about 65 m of gross reservoir interval.
- Acid stimulation and production testing are expected during the second half of September, subject to service-provider availability.
MONTREAL (Oil Monster): Horizon Petroleum has completed the mechanical phase of its Lachowice 7 (L7) gas well workover in southern Poland, clearing the way for re-perforation, acid stimulation and production testing of the Upper Devonian reservoir.
What the Lachowice 7 Workover Has Shown
The company successfully milled and recovered the downhole packer and completion equipment installed when the well was suspended in 1999.
During the operation, more than 200 m³ of completion fluid was lost to the formation and natural gas entered the wellbore. The gas was controlled and cleared, with no further incursion reported.
Horizon said the fluid losses indicate that existing perforations into the naturally fractured Devonian carbonate reservoir remain open. The company said the gas encountered during the workover also confirmed the presence of natural gas.
What Horizon Plans Next at Lachowice 7
The company now plans to re-perforate approximately 65 m of gross reservoir interval before installing the final completion string.
A diverted acid stimulation and production testing program is expected during the second half of September, subject to service-provider availability.
Production Testing Will Assess Sustainable Gas Flow
Lachowice 7 has previously flowed at rates of up to 8.9 MMcfd, including a sustained controlled rate of approximately 3.0 MMcfd over a two-week period.
The upcoming testing program will assess the well's current sustainable production capability.
“The next major step in demonstrating the deliverability of the naturally fractured Upper Devonian reservoir at L7 is the successful execution of the diverted acid stimulation and subsequent production testing program,” said Roger McMechan, COO of Horizon Petroleum.
What Happens After Production Testing
Following testing, Horizon plans to temporarily suspend the well in preparation for potential future commercial production.
Frequently Asked Questions
What work has Horizon Petroleum completed at Lachowice 7?
Horizon has completed the mechanical phase of the well workover and recovered the downhole packer and completion equipment installed before the well was suspended in 1999.
What happened during the Lachowice 7 workover?
More than 200 m³ of completion fluid was lost to the formation, and natural gas entered the wellbore. The gas was controlled and cleared with no further incursion reported.
How much of the reservoir will Horizon re-perforate?
The company plans to re-perforate approximately 65 m of gross reservoir interval.
When is Lachowice 7 production testing expected?
Diverted acid stimulation and production testing are expected during the second half of September, subject to service-provider availability.
How much gas has Lachowice 7 produced previously?
The well has previously flowed at rates of up to 8.9 MMcfd, including a sustained controlled rate of approximately 3.0 MMcfd over a two-week period.
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Courtesy: www.worldoil.com