Mobil Erdgas-Erdol GmbH, a Mobil Corp. unit operating in Germany, has claimed a world depth mark for a horizontal well at a drillsite about 40 miles southwest of Hamburg. Mobil drilled Z-10 Soehlingen to a record 15,688 ft true vertical depth, cutting 2,066 ft of horizontal hole in Permian Rotliegendes tight sand pay. The well went to 18,860 ft measured depth. Mobil also claimed a world depth record for multiple hydraulic fracturing. Stimulation amounted to four frac jobs in the horizontal section's tight gas sand. Tests, which began in January, show economic production rates "from a natural gas reservoir which cou...

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