Page 9 - LatAmOil Week 37 2019.pdf

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Guyana’s offshore zone (Photo: Eco Atlantic Oil & Gas)
Double discovery offshore Guyana
BOTH ExxonMobil (US) and Tullow Oil (UK-Ireland) have announced new oil finds off- shore Guyana this week.
On September 16, Tullow said it had dis- covered crude oil at Joe-1, a well drilled at the Orinduik block. In a statement, the company explained that it had encountered 14 metres of net pay in the well, which was sunk to a depth of 2,175 metres in 780-metre-deep water. The oil lies within sandstone reservoirs in Upper Tertiary strata, it said.
Tullow did not comment on the size of the discovery, saying that it had yet to evaluate the data collected from Joe-1 together with data from Jethro-1, another oil find within the Orin- duik block.
It also stated that it intended to wait until the completion of its next exploration well at Car- apa before deciding how best to move forward with exploration and appraisal operations.
But it also pointed out that Joe-1 had been the first Upper Tertiary oil discovery in the Guyanese offshore zone. The find serves to de-risk the petroleum system of the western part of the Orinduik block, where Tullow has already identified a number of Cretaceous and Tertiary prospects, it added.
The company and its partners are set to spud the Carapa-1 exploration well before the end of September. They will drill the well using the Rowan EXL II rig and expect to complete it in the fourth quarter of the year.
Also on September 16, ExxonMobil said it had made another discovery of oil at the Stabroek block. It explained that it had encoun- tered nearly 33 metres of pay in Tripletail-1, a well drilled in the Turbot section of the block in 2,003-metre-deep water.
Like Tullow, the US company did not reveal the size of its find. It did say, though, that the high-quality sandstone reservoirs in Tri- pletail-1 would push Stabroek’s recoverable resource estimate up from the current figure of more than 6bn barrels of oil equivalent (boe).
ExxonMobil used the Noble Tom Madden drillship to sink the Tripletail-1 well at a site around 3 miles north-east of Longtail, a previ- ous discovery at the block. The company’s next step will be to move the vessel to a site about 6 miles (9.6km) east of the Liza field to drill the Uaru-1 well.
“Exploration and development activities are moving forward elsewhere on the Stabroek Block offshore Guyana,” the US major added. “The Stena Carron drillship is currently drill- ing the Ranger-2 well and upon completion will conduct a well test at Yellowtail-1. The Noble Bob Douglas drillship is currently completing development drilling operations for the Liza Phase 1 project. ExxonMobil will add a fourth drillship, the Noble Don Taylor, in October 2019, as we continue to optimise our drilling plans based on well results and ongoing study of the basin.” ™
Week 37 19•September•2019 w w w . N E W S B A S E . c o m P9