Dunquin disappoints but Irish hunt continues

Monday, July 22, 2013

A partner on the 44/23-1 Dunquin North exploration well being drilled by ExxonMobil offshore Ireland says the reservoir is water bearing.

Providence Resources, which holds a 16% interest in frontier exploration license 3/04, containing Dunquin, said the primary Lower Cretaceous Dunquin target was encountered and was found to be a thick overpressured carbonate reservoir system. Preliminary analysis indicated the reservoir to be water bearing. Log data indicated a residual oil column, which Providence said suggested a trap had formed at Dunquin North, but that the hydrocarbons had since leaked.  

Drilling on Dunquin North started in April, using the Eirik Raude semisubmersible drilling unit, in about 1700m water in the Porcupine Basin about 170km off the south-west coast of Ireland.

It had been described as “a landmark well”, due to being the first to be drilled in the central part of the southern Porcupine Basin and designed to test a new and Lower Cretaceous carbonate exploration play concept.

The well is now being plugged and abandoned. The rig will be demobilized out of Irish waters.

John O'Sullivan, technical director of providence, said: "The Dunquin exploration play comprised two interpreted carbonate features, Dunquin North and Dunquin South. The presence of a potential residual oil column may indicate that hydrocarbon entrapment has occurred at Dunquin North but that the oil has subsequently leaked.

“Top seal integrity had been identified pre-drill as a possible risk for Dunquin North, with fluid escape features and seabed core hydrocarbon anomalies present over the prospect. Notably, the separate Dunquin South build-up appears to have a thicker seal and lacks the significant fluid escape features seen further to the north."

ExxonMobil Exploration and Production Ireland (Offshore) operates and holds 25.5% in license 3/04. Partners are Eni Ireland (27.5%), Repsol Exploracion Irlanda (25%), Providence Resources (16%), Atlantic Petroleum (Ireland) (4%) and Sosina Exploration 2%).

Image: The Eirik Raude semisubmersible drilling unit. 

Categories: Drilling Europe

Related Stories

Brazil's New Dawn

Johan Sverdrup Comes On Stream

Exxon Appoints Bank to Sell Malaysia Assets

Equinor Makes FID for Hywind Tampen

Activists Climb Shell North Sea Platform

LLOG Orders 20k Trees for Shenandoah

Chestnut Field Extended Up to Three Years

Record US GoM Production Expected to Continue

ProPetro Cuts Almost 150 Workers

Finding New P&A Alternatives

Current News

An Unusual Abandonment

Finding New P&A Alternatives

Industry Shares North Sea Data with Scientists

SBM Secures Liza Unity Financing

How Brazil's $26 Bln TOR Auction Works

Greater Castberg Survey Wraps Up

Wood Names Cox as Americas CEO

Another Near Miss on the Terra Nova FPSO

Record US GoM Production Expected to Continue

MODEC, Yinson Win FPSO Charters from Petrobras


Offshore Engineer (Sep/Oct 2019)

This issue of Offshore Engineer is dedicated to Big Data and Digitalization


Subscribe for OE Digital E‑News

OE Digital E-News is the subsea industry's largest circulation and most authoritative ENews Service, delivered to your Email three times per week