Enap's Pampa del Castillo Field Continues to Produce Good Results

The Pampa del Castillo field, in the Argentine Golfo San Jorge basin where Enap Sipetrol is the operator with a hundred percent participation since October 2001, has again produced good results.

The good news continues in the 2007 campaign of Enap Sipetrol Argentina's Pampa del Castillo field.

Following the auspicious start to the 2007 campaign, with the drilling of the PC 2063 and PC 2065 wells, the third well, called PC 2064, recently began production at a rate of close to a net 400 barrels per day (bpd) of oil, representing about three times the typical production of a well in this field. This opens up interesting possibilities for the southern sector of the La Guitarra block where it was drilled.

The Pampa del Castillo field recently increased its oil production to 1,200 m3/d (7,550 bpd), partly due to these good results.

Maintaining these production levels is the greatest challenge of the operation, which treats and re-injects close to 35,000 m3/d of water into the reservoir to improve oil recovery. The Pampa del Castillo field has proven reserves of over 3.5 Mm3 of oil (more than 22 million barrels) and, in five years of operation, Enap Sipetrol Argentina has replaced 98% of the reserves produced.

Environmental achievements

The PC2064 well also marks important progress with respect to the management of environmental liabilities and optimization of operative processes as the elimination was successfully tested there of the drilling waste disposal pool, which waste includes the mud and cuttings of the drilled formations.

The testing method consists of improving the present mud treatment system by using a "dry placement". The humidity of the waste is reduced and is mixed on site in suitable proportions with the vegetal soil extracted during the construction of the location, and then scattered when it is recovered. Initial tests show that soil conditions are even improved for the growth of autochthonous vegetation.

The operative improvements shown by the test and the growth of native species in the mixed soil obtained allow us to predict that the tested methodology can be applied and extended as a most important contribution to a reduction in the environmental impact of the operations of Enap Sipetrol Argentina.