The elusive Alif Formation sands are the primary exploration targets within and below a thick Jurassic salt section in Vintage Petroleum's Yemen Block S1 play. These meandering reservoirs, deposited underneath a series of large, laterally varying salt bodies are a difficult stratigraphic target to predict. Their elusive bounty is further complicated by extensional and listric faulting in this 1.1 million-acre wildcat tract. The story behind Vintage's Annaeem-1 well (Figure 1) is instructional because integrating good exploration fundamentals, geochemical analysis, and advanced seismic technologies mitigated risk. The result is a well that flowed hydrocarbons from porous, permeable sands in...

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