The objective of this paper is to discuss the journey of developing the first unconventional gas opportunity in Egypt. The transformation of the development concept through successful appraisal and pilot phases will be discussed, emphasizing the key learnings and outcomes from the first pilot project including a horizontal well with a multi-stage hydraulic frac. The integration of the early results from the pilot into some stochastic techniques to evaluate a range of EUR/well and range of production forecasts will also be discussed.
The Apollonia gas-bearing chalky carbonate reservoir has been appraised by 6 vertical wells. Initial attempts to evaluate Apollonia reservoir potential have relied on either natural flow or relatively small scale propped sand frac jobs with limited success. In early 2012, foam fraccing was performed to improve well productivity and ultimately project economics. Whilst significant productivity improvement was observed, the higher production rates could not be sustained.
The key uncertainties were establishing a reliable long term production profile and achieving sustainable production flow to make the development commercially viable. Estimated well ultimate recoveries from vertical wells are uneconomic. An alternative well concept was therefore required that could deliver an economical development.
A pilot phase was designed in 2015 to deploy and test 3 long reach horizontal wells, stimulated with multi-stage hydraulic fracs. Two pilot wells were drilled in 2016 and currently in production with a data acquisition program in place to determine the technical viability and commerciality. Learnings from the 2 pilot wells are being assessed to optimse the design concept for the planned 3rd pilot well.
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