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Korea. Sailaway and installation of the well planning, geo-steering topsides is planned in 2016. The Cat J and therefore optimize the jackup, designed to Statoil’s specifcations, Heimdal development, mov- to be owned and operated by Noble, is ing away from pattern drilling under construction at Sembcorp Marine’s towards more target driven

Jurong yard in Singapore. drilling. The improved image

Field of View of the Heimdal sands and

Tackling Heimdal their distribution across the

The main, deeper (at about 1492m)

Mariner licenses on the new

Maureen reservoir is currently planned seismic data will ultimately to have 17 producers and fve water be tested when drilling of the injectors, with frst oil from the Maureen

Maureen production wells reservoir in 2017. The Maureen reservoir starts in 2017.

has 14º API gravity oil and an oil viscos- 130-well program ity of 65 cP, with excellent reservoir properties. The reservoir itself is very Over the feld’s lifetime, as well understood; it has a clear seismic many as 130 well targets response, can be correlated between are planned. This will be wells and has good core recovery. a major factory, deliver-

However, the shallower (1227m) ing one well per month in

Heimdal reservoir has long been con- the frst years of operation. sidered the main challenge at Mariner Submersible pumps will be and could, at least until recently, not be needed to bring the oil to mapped seismically. The challenging the surface. Statoil’s experi- nature of vintage seismic led towards ence from its own heavy oil a stochastic reservoir model. The projects, like Grane on the

Heimdal has 12º API gravity oil and an Norwegian Continental Shelf oil viscosity of over 500 cP, again with and Peregrino in Brazil, has excellent reservoir properties. The cur- made a signifcant contri- Chris Andrew (left) vice president for asset rent development strategy based on the bution here. The develop- management for Statoil in Aberdeen and Gunnar Breivik (right) MD for Statoil production UK and head of the stochastic model is pattern drilling using ment of directional drilling,

Aberdeen ofce, in front of the Mariner jacket under an inverted nine-spot pattern, which is long horizontal wells and construction at Dragados Ofshore yard in Cadiz, Spain.

planned to have 39 dual multi-lateral multi-laterals was crucial production wells and 32 water injectors. for Mariner’s development, allowing A total 22 drilling and well services

First oil from the Heimdal reservoir will increased exposure to the reservoir and are included in the scope, including a follow on from the Maureen plateau to the ability to reach more well targets. logistics support responsibility that goes optimize plateau production. This technology was not available when beyond the normal scope for similar

In 2012, a full feld broadband seismic

Mariner was frst discovered. Statoil contracts. The contract started survey was acquired, with fnal processed

Drilling is planned to start in 2016. in January 2015 and runs for four years, products were available in 1Q 2014. This

Odfjell has the platform drilling contract. with options to be extended several times applies the newest advances in acquisition

The main Mariner platform will include for further four-year periods. The contract and processing technology to obtain better a drilling rig and a well intervention and with Schlumberger Oilfeld also includes imaging of the Heimdal sands. There has completion unit. The intervention and options for Bressay, another Statoil oper- subsequently been a focus on integrating completion unit is an innovation that ated feld on the UKCS, currently in the the new seismic data into a more deter- will allow Statoil to run completions and concept evaluation phase. ministic reservoir model. A more deter- set submersible pumps without using the “Mariner is by all accounts a large ministic model would greatly improve drilling rig. The wells will have sophis- and challenging project,” says Gunnar ticated valves that automatically Breivik, managing director of Statoil shut out reservoir zones with high Production UK and head of the Aberdeen water cut. In addition, the newbuild offce. “When Mariner starts producing jackup rig will be located next to in 2017, it will be 40 years after the frst the Mariner installation, working seismic that identifed the structure. through well slots on the platform The discovery well was drilled already for the frst 4-5 years. in 1981. Several operators have worked

A contract for integrated drilling hard on this project before us. We are and well services on the Mariner proud to be the operator able to bring this feld was awarded to Schlumberger feld on stream, but we are building on

Oilfeld UK in December 2014. decades of good work by many others.”

Statoil is the operator of the Mariner

Schematic of Statoil’s Cat J design feld with 65.11% equity. Co-venturers are rig currently under construction at

JX Nippon Exploration and Production

Sembcorp Marine’s Jurong yard in (UK) (28.89%) and Dyas (6%).

Singapore for use on Mariner.

March 2015 | OE oedigital.com 18 016_OE0315_field of view_em1.indd 18 2/22/15 12:34 PM