Pantheon Resources plc, the oil and gas company with a 100% working interest in the Kodiak and Ahpun projects, collectively spanning 193 000 acres in close proximity to pipeline and transportation infrastructure on Alaska’s North Slope, is pleased to advise that operations for the re-entry at Alkaid-2 have now commenced.
The Alkaid-2 re-entry has three primary objectives:
- To gather the best possible reservoir fluid samples for pressure-volume temperature ("PVT") analysis.
- To determine initial reservoir pressure.
- Test the improvements in the frac design discussed in recent Company webinars.
The objective of the operations at Alkaid-2 is not to target maximum flow rates. Pantheon will deliberately restrict the flow rates to minimise gas production into the well bore and allow optimum data collection.
Re-entry to assess SMD
The Alkaid-2 well was positioned to target the Zone of Interest (“ZOI”) in the optimum location and is on the edge of the mapped SMD reservoir. Notwithstanding the thinner SMD interval at this location when compared to the core of the Ahpun Field, the well encountered encouraging hydrocarbon indications en route to the deeper ZOI.
The programme of operations to achieve the three primary objectives includes:
- Make well safe in preparation for operations.
- Run a plug to isolate the Alkaid ZOI below the SMD horizon.
- Perforate a limited section to ensure injection pressures are high enough to propagate the frac lobes horizontally as desired.
- Pump 11 000 bbls of water and 400 000 lbs of 100 mesh sand.
- Flow back slowly to prevent or limit gas flashing in the reservoir (i.e. exsolving from solution in an uncontrolled manner) in order to gather the most representative fluid samples possible.
- Monitor pressures throughout to assess frac efficiency and original reservoir pressure.
Jay Cheatham, CEO, said: “We are pleased that operations for the re-entry at Alkaid-2 have now begun. As stated, we are not targeting maximum flow rates, instead, this programme is designed to allow for as much data gathering as possible. Whilst the location of the Alkaid-2 well is not ideal for the shallower SMD horizon, the Company was pleasantly surprised to have logged oil pay when drilling through the SMD en route to the primary target, the ZOI. This has provided a low-cost option to assess both the productivity of the shallower horizon and test our improved frac design.”
The Alkaid-2 well was drilled in 2022 and was positioned to prioritise testing of the primary target (ZOI), being the oil zone successfully flow tested in the Alkaid-1 well in 2019. Testing of the ZOI was compromised in Alkaid-2 as a result of wellbore blockages, necessitating a number of cleanout and other remedial operations. Ultimately, the ZOI produced an IP30 production rate of 505 bpd of marketable liquid hydrocarbons consisting of oil, condensate and NGLs, as well as natural gas.
As previously announced, extensive analysis has been undertaken on the Alkaid-2 ZOI results with the data supporting a commercial development based upon 10 000ft lateral development wells, a doubling of the frac efficiency to 40% and assuming no improvement in reservoir quality. The data indicates that well productivity has the potential to improve materially based upon better frac design. Tony Beilman, Pantheon’s recently appointed Senior VP of Engineering, and an expert in fracking in North America, believes that with iterative optimisation, Pantheon has the potential to meet typical performance benchmarks, a four times improvement upon that achieved in the ZOI. One of the primary objectives of the upcoming Shelf Margain Deltaic test is to assess the efficacy of an updated frac design.
Read the article online at: https://www.worldpipelines.com/business-news/27092023/re-entry-of-alkaid-2-has-commenced/
You might also like
Oxford Flow expands its product range and grows market potential with new high- and low-pressure pilots.