The Kotter and Logger oil and gas fields are mid-size fields located in the Netherlands sector of the North Sea, about 40 km west of Den Helder and 107 km north west of Amsterdam. The Kotter and Logger oil fields produced oil from 1984/5 to 2015.

The fields

The Kotter oil and gas fields are located in Block K18 of the

Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...

sector of the southern

North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea, epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the ...

. The oil reservoir is a

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

Jurassic The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of ...

sandstone at a depth of 7,500 feet (2,286 metres) and comprises two accumulations in Vieland and Delfland sands. The gas reservoir is an Upper

Rotliegendes The Rotliegend, Rotliegend Group or Rotliegendes (german: the underlying red) is a lithostratigraphic unit (a sequence of rock strata) of latest Carboniferous to Guadalupian (middle Permian) age that is found in the subsurface of large areas in wes ...

sandstone at a depth of 4,217 to 4,337 metres, below

Zechstein The Zechstein (German either from ''mine stone'' or ''tough stone'') is a unit of sedimentary rock layers of Middle to Late Permian (Guadalupian to Lopingian) age located in the European Permian Basin which stretches from the east coast of Englan ...

salt. The Logger oil field is in the adjacent Block L16 and is also a Cretaceous/Jurassic sandstone lying at a depth of 7,215 feet (2200 metres), it has a thickness of 10 to 30 metres. The Kotter oil field was discovered by Conoco in August 1980, the Logger oil field in March 1982, and the Kotter gas field in 1992, both also discovered by Conoco. The properties of the reservoir/ wellhead fluids are:

Development

The Kotter and Logger oil fields were developed though a number of platform installations. Oil from Logger was exported to Kotter. Oil from Kotter was exported to the Helder A platform and the combined flow sent to Amsterdam. Produced gas from both oil fields was flared. The K18-FB gas field adjacent to Kotter is a

stranded asset Stranded assets are "assets that have suffered from unanticipated or premature write-downs, devaluations or conversion to liabilities". Stranded assets can be caused by a variety of factors and are a phenomenon inherent in the 'creative destructi ...

with no gas transportation infrastructure and remains undeveloped. The Logger installation had a water injection capability of up to 4 injection wells. Injection water was transferred from Kotter to Logger through a 19 km 6-inch pipeline. The Kotter production facility was originally designed for these throughputs. The Logger installation had a production capacity of 10,000 bbl/d of oil. The K18 Golf facility aimed to produce 1.0 to 1.4 million cubic metres of gas per day. The Kotter and Logger fields were originally owned and operated by Conoco until they were taken over by Wintershall. Production ceased in 2015 and the wells and installations were decommissioned and decontaminated. The platforms and jackets were removed from the field in 2019.

References

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North Sea energy

Oil fields in the Netherlands

The fields

Development

See also

References