Questerre Energy Corporation and Transeuro Energy Corp. reported today on the preliminary test results from the A-8 well at the Beaver River Field.
Three prospective intervals in the Nahanni formation identified on drilling logs were perforated earlier this month. Pre-stimulation there was a continuous dry gas flow to surface. The well was subsequently stimulated late Thursday evening with a 51 m3 acid squeeze. Late Friday, during an 8-hour initial cleanup, the well flowed back the spent acid and cleaned up to rates in excess of 5 mmcf/d (830 boe/d) on a final choke size of 38/64" and a flowing tubing pressure of over 8000 kPa. During the flow period, 80 m3 of fluid was recovered which is in excess of the stimulation fluid used. This excess is likely formation water.
Separate pressure recorders were run with the bottom set of perforations isolated from the upper two sets of perforations. The well is currently shut-in to gather an initial reservoir pressure and pressure gradient between the perforation intervals. A production test with a full flow and buildup is planned to begin as soon as the drilling rig can be moved off the location. Subject to final results, Questerre and Transeuro have commenced plans to tie-in the well to the local gathering system.
"A-8 was drilled to prove the concept of both partial and complete sealing of compartments in the Nahanni," said Michael Binnion, Questerre President and CEO. "With substantial free gas rates, it is clear that partial sealing exists for the A-8 compartment that is supportive of our reservoir model. However, the initial flow rate, pressure and apparent presence of formation water suggest there is not full sealing for this compartment which indicates a different sealing mechanism than originally predicted. The initial gas flow rates are less than we had hoped for. Without data from the pressure recorders and a full production test, we cannot determine the impact of the acid squeeze on the flow rates of gas and water. We expect the final production test to assist in determining what work can be done to isolate the perforation intervals and/or improve on the acid stimulation. We estimate the gathering and analysis of this data to take a few weeks."
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