A tight gas carbonate reservoir with no oil rim in a supergiant onshore gas field in Abu Dhabi was targeted for stimulation during a field review to increase field production. It became necessary to look at selective fracturing-stimulation techniques that could be applied riglessly and allow contribution from the nonproducing zones. This paper describes a unique engineering approach, the hydrajet-fracturing (HJF) technique, successfully executed for this purpose.
HJF Technique
When HJF tools are used to perforate and fracture wells (Fig. 1 above), a jet nozzle accelerates fluid to a very high speed (greater than 600 ft/sec). With the assistance of abrasives in the fluid, the jet erodes a perforation within the rock.
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