Project Profile
Location: Western central part of the Marañon basin, Peru
Reserves: up to 2.2 TCF of whole recoverable potential gas reserves and a high probability of C5 condensates
Drilling Depth: 2,000 - 3,000 m
Area: 1,700 km
Block 183 is located along western central part of the Marañon basin. Block 183 is covered by around 1,700 km of seismic 2D acquired by SUN OIL, Deminex, Amerada Hess and Phillips, in the 70’s. In 1985 and 1987 part of this data was reprocessed and migrated in depth by Petroperu. First geological works in this area were made by Kummel, Rosenzweig (1948) and Petroperu. This well was drilled by Texas Petroleum Company in the 50’s. The well was TD in the Cushabatay Formation (Lower Cretaceous, more of 2,300m). Poor hydrocarbon shows were encountered in Cretaceous targets. In 1974, Deminex acquired seismic information and geologic field works. In 1975, Loreto 1X and Shanusi 2X wells were drilled by this company. The Shanusi well was TD to 4487 m in the Pucará Formation (Triassic –Jurassic). Strong gas and condensates shows were encountered at the upper part of Pucará and gas and water shows at the bottom of well. No tests and well logs have been made in this interval (500 m). Parsep (2002) indicated that this well was drilled in the flank of the Shanusi structure and tested the Cretaceous structural culmination of the feature drilled.
The seismic available in the 183 Block is a collection of older reprocessed - data from the 1970’s and a more recent data set acquired in the north half of the Block 160 by Coastalin the late 1990’s. By 2006, Hess Company reprocessed seismic lines in block 183. There are two oil fields, Maquia and Huaya (sub commercial) located neighboring the southern portion of the Block 183 and one gas field, Aguaytia, in the south. Maquia and Huaya have oil within the Upper Cretaceous Vivian reservoirs sourced from the Pucará Formation, and Aguaytia, is a gas and condensate field producing from the Lower Cretaceous Cushabatay reservoir. The gas in Aguaytia is believed to be sourced from the Pucará although a study by Occidental Petroleum concluded that the gas is sourced from the Ambo Formation. In the latest bid round (October 2010), Clontarf Energy won the Peruvian block Lote 183. The Block contains up to 2.2 TCF of whole recoverable potential gas reserves and a high probability of C5 condensates.
Operators:
Hydrocarbon Exploration Peru Ltd (HEPL): 100% interest (UOGG holds 80% interest in HEPL)
Union Oil and Gas Group (UOGG): Operator
Clontarf Energy
Contractors:
ZEP-TECH: AVO (Amplitude vs. Offset) analysis