Bamboo West, a heavy oil (API Gravity 18-20) field is locatedrnin Muglad basin of south-central Sudan. Field consists ofrnmultilayered sandstone reservoirs of late cretaceous age. Thernreservoirs in this field are highly heterogeneous, thinlyrnbedded, unconsolidated with high viscosity and strong aquiferrnsupport. The field is on production since July 2001 and isrncontributing significantly in the current 300,000 bopdrnproduction of Sudan.rnProduction performance of vertical wells through PCP andrnESP suggests that field is facing severe problem of waterrnconing and viscous fingering. Water cut has increased to 68 %rnin a span of less than 4 years causing decline in wellrnproductivity and leaving significant bypassed oil in thernreservoir.rnHorizontal wells were considered the best solution forrnimproving the well productivity in this thinly bedded heavy oilrnfield with objective for tapping the bypassed oil and delayingrnthe water production while controlling the sand production duernto low drawdown pressure and increased exposure to thernreservoir.rnThis paper discusses about identification of bypassed oil,rnhorizontal well placement cycle and dynamic underbalancernwith oriented perforation techniques that were used in BamboornWest field. A multidisciplinary approach and combination ofrnthese techniques used first time in the Middle East, Asia andrnAfrica region resulted in the production of 1800 bopd in arnhorizontal well (Nearly four times of vertical well) of heavyrnoil from a reservoir of 0.5m thick with no water and sandrnproduction. Paper also emphasizes about different ingredientsrnthat are important for making the horizontal well successful inrnsuch fields, which can add value to the asset and results intornimproving the reserves and improvement in overallrndevelopment strategy of the field.
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