With the aim of reducing the risk and uncertainties of the Late Miocene Abu Madi reservoir prior to production, German oil company RWE Dea completed three appraisal wells in the Egyptian Sidi Salem South East-1 and East-2 gas fields between March and May this year. The two Sidi Salem South East Fields are approximately 20 km southwest of the North Sidi Ghazy Field Disouq Central Treatment Plant (CTP).
The first appraisal well, Sidi Salem South East-2-3 (SSSE), was drilled to test the northeastern extension of the field in a downdip location 2 km south-southwest of the SSSE-2x discovery well. The well encountered a gas-down-to at -2647 m, some 33 m deeper than the gas-down-to seen in the SSSE-2x well. The second appraisal well, SSSE-2-2, targeted the northern field extension and again encountered a gas-down-to at -2632 m.
The occurrence of gas-down-to levels in progressively downdip well locations suggests that a field-wide intraformational bottom seal is part of the trapping mechanism in the SSSE-2 Field, according to Richard Vaughan, Disouq Subsurface Project Head. The third well, SSSE-1-2, was drilled successfully as an appraisal of the separate SSSE-1 structure 1.5 km east of the discovery.
“We are very encouraged by the overall results of the recent appraisal wells,” Vaughan said. “All SSSE wells have been completed and temporarily suspended as gas producers. Perforations will be added as part of a rigless campaign later in 2014-2015.”
The Weatherford 94 Rig is now drilling the final Phase B Disouq Development well, Disouq-1-3. The well targets multiple reservoirs levels of the Pliocene and Late Miocene age in an adjacent structural compartment east of the main Disouq Field and about 30 km from the Disouq CTP. Results from the near-field exploration well Disouq-1-3 are expected this month. Meanwhile, RWE Dea Egypt received internal approval to drill three near-field exploitation wells in the Disouq Development Lease.
“The addition of these wells shows RWE Dea’s continuing commitment to add reserves to its Disouq Development Project,” said Maximilian Fellner, RWE Dea Egypt's General Manager. “Through our partnership with the Egyptian Natural Gas Holding Company, we want to boost the gas production beyond the currently planned production target of 100 mmscf/D to meet the ever-growing energy demands of Egypt.”
This next phase of drilling, which targets again the Late Miocene Abu Madi Formation, will follow immediately after the completion of the Disouq-1-3 well.
Abdelghani Henni is the Middle East Editor for the Journal of Petroleum Technology.