HORIZONTAL WELL IMPROVES RECOVERY IN DEEP SOUR GAS FIELD

Siegfried K. Schueler Mobil Erdgas-Erdol GmbH Celle, Germany A five-fold increase in production resulted from one of the world's deepest horizontal gas wells drilled in the sour Zechstein formation in Germany. The Siedenburg Z-17, Germany's first deep horizontal gas well, currently produces 17,000 cu m/hr (15 MMcfd) at a wellhead flowing pressure of 48 bar (700 psi); this rate is substantially greater than that of comparable vertical wells in the area.

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