Sound Energy’s TE-10 gas discovery on Morocco’s Tendrara permit failed to find success while on test. While the well flowed gas to the surface, it did not achieve commercial flow rates following the stimulated well test.
James Parsons, CEO, commented, “Whilst clearly disappointed with the outcome of the recent well test at TE-10, the team and I are encouraged to have delivered gas to surface from another TAGI discovery and remain confident in the potential of our Eastern Morocco basin. We have now completed the TAGI element of our current exploration program and expect to update shortly on our forward looking strategy.”
Both internal and external petrophysical interpretations of wireline log data, integrated with FMI (high definition formation micro-imager log), and side wall core analyses, estimated net pay of up to 15.4 meters in a succession of thinly bedded gas bearing intervals distributed throughout the 110 meters gross TAGI reservoir interval. The presence of moveable hydrocarbons was further supported by the successful recovery of a gas sample from 1,937 meters MD (mMD), with no evidence of water, using a modular formation dynamics tester (MDT).
A test program was designed to assess commerciality, which included perforation of four zones within the gross TAGI interval and stimulation of the uppermost primary zone. Sound announced securing gas to surface pre-stimulation from this primary zone on May 8.
A mechanical stimulation was carried out over the uppermost primary zone (1,932 to 1938 mMD) by an experienced crew of Schlumberger engineers, deploying “state of the art” Schlumberger Hi-Way technology, the first use of this technique in Morocco. Wireline data acquired during the operations indicated that the stimulation was successful and that the formation was likely fractured over an interval between 1,924 mMD and 1,946 mMD. After the initial clean up this zone was flowed and recovered a mixture of gas and liquid, largely comprising the fluid used in the stimulation. Two nitrogen lift operations were subsequently performed in an attempt to increase the gas flow rate, followed by nitrogen injection into the fracture network. Despite the nitrogen lifts and injection, the company reports that the gas flow rates achieved were below the 1.5 Mmscf/d to 2.0 Mmscf/d commercial threshold required for development previously advised by the company. In total approx. 64,500 scf of gas and approximately 2,300 barrels of liquid were recovered over an 11-day period. The hydrocarbon gas was sampled and flared at the wellsite.
The secondary lower three zones did not flow gas unstimulated, and a sample of liquid subsequently interpreted as formation water, was recovered from the third zone (1,965 to 1,977 mMD). The subsequent analysis of this water supported the petrophysical interpretation of high gas saturations in the uppermost primary zone.
The company now intends to deploy a downhole gauge to monitor the pressure in the well and will demobilize the test equipment and crew from the TE-10 well site.