2010-10-02 Nodding Donkey Kimmeridge Bay

The Kimmeridge Oil Field is an oil drilling site, northwest of

Kimmeridge Bay Kimmeridge Bay () is a bay on the Isle of Purbeck, a peninsula on the English Channel coast in Dorset, England, close to and southeast of the village of Kimmeridge, on the Smedmore Estate. The area is renowned for its fossils, with The Etche ...

, on the south coast of the

Isle of Purbeck The Isle of Purbeck is a peninsula in Dorset, England. It is bordered by water on three sides: the English Channel to the south and east, where steep cliffs fall to the sea; and by the marshy lands of the River Frome, Dorset, River Frome and Poo ...

, in

Dorset Dorset ( ; Archaism, archaically: Dorsetshire , ) is a Ceremonial counties of England, ceremonial county in South West England. It is bordered by Somerset to the north-west, Wiltshire to the north and the north-east, Hampshire to the east, t ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

Location

The small village

Kimmeridge Kimmeridge () is a small village and civil parish on the Isle of Purbeck, a peninsula on the English Channel coast in Dorset, England. It is situated about south of Wareham and west of Swanage. In 2013 the estimated population of the civil ...

is about south of Wareham and about west of

Swanage Swanage () is a coastal town and civil parish in the south east of Dorset, England. It is at the eastern end of the Isle of Purbeck and one of its two towns, approximately south of Poole and east of Dorchester, Dorset, Dorchester. In the Unit ...

. The Kimmeridge

oil field A petroleum reservoir or oil and gas reservoir is a subsurface accumulation of hydrocarbons contained in porous or fractured rock formations. Such reservoirs form when kerogen (ancient plant matter) is created in surrounding rock by the prese ...

is part of the

Wytch Farm Wytch Farm is an oil field and processing facility in Dorset, England. It is the largest onshore oil field in Western Europe. The facility, taken over by Perenco in 2011, was previously operated by BP. It is located in a coniferous forest on Wytc ...

oil field and processing facility operated by

Perenco Perenco is an independent Anglo-French oil and gas petroleum company, company with a headquarters in London and Paris.Pere ...

. Wytch Farm is on the southern shore of

Poole Harbour Poole Harbour is a large natural harbour in Dorset, southern England, with the town of Poole on its shores. The harbour is a drowned valley ( ria) formed at the end of the last ice age and is the estuary of several rivers, the largest being th ...

and about northeast of the oil well. Kimmeridge Bay and its cliffs are part of the

Jurassic Coast The Jurassic Coast, also known as the Dorset and East Devon Coast, is a World Heritage Site on the English Channel coast of southern England. It stretches from Exmouth in East Devon to Studland Bay in Dorset, a distance of about , and was ins ...

, a

World Heritage Site World Heritage Sites are landmarks and areas with legal protection under an treaty, international treaty administered by UNESCO for having cultural, historical, or scientific significance. The sites are judged to contain "cultural and natural ...

, because of the quality and variety of

geological Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth s ...

landforms A landform is a land feature on the solid surface of the Earth or other planetary body. They may be natural or may be anthropogenic (caused or influenced by human activity). Landforms together make up a given terrain, and their arrangement i ...

along the coast.

History

In Dorset the search for oil started back in 1935. Between 1958 and 1980 six wells were drilled in Kimmeridge Bay. The first drilling of the Kimmeridge oil field was the Broadbench 1 well to the north of Broadbench, which revealed neither oil nor gas. The second well Broadbench 2, later renamed Kimmeridge 1, was drilled in 1959 and both oil and gas were discovered. The Kimmeridge 2 well (drilled 1960) to the east of the car park showed only small amounts of oil, but it was retained as an observation well. The drillings Kimmeridge 3 (drilled 1959 to 1960) at Broad Bench and Kimmeridge 5 (drilled in 1980 near the Kimmeridge 1 well) exposed only weak oil contents, while the drilling Kimmeridge 4 in 1960, east of Brandy Bay by Long Ebb, revealed no exposures due to a mechanical breakdown. The Kimmeridge 1 well site, is a small site, with a single beam pump or "

nodding donkey A pumpjack is the overground drive for a reciprocating piston pump in an oil well. It is used to mechanically lift liquid out of the well if there is not enough bottom hole pressure for the liquid to flow all the way to the surface. The arr ...

" which has been pumping continually since 1961, making it the oldest working oil pump in the UK. The well once produced 350 barrels per day, but currently yields around from the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya. ...

strata In geology and related fields, a stratum (: strata) is a layer of Rock (geology), rock or sediment characterized by certain Lithology, lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by v ...

that lie around below the cliff. The well has been operating this long because it is tapped into a network of connected reserves, however the yield is decreasing. The oil is transported by tanker to Wytch Farm, from where it is piped to the storage tanks at

Hamble-le-Rice Hamble-le-Rice, commonly known as Hamble, is a village and Civil parishes in England, civil parish in the Eastleigh (borough), Borough of Eastleigh in Hampshire, England. It is best known for being a flying training centre during the Second Wor ...

Southampton Water Southampton Water is a tidal estuary north of the Solent and the Isle of Wight in England. The city of Southampton lies at its most northerly point, where the estuaries of the River Test and River Itchen meet. Along its salt marsh-fringed we ...

before being shipped to the main refinery. The nodding donkey has a high wire-mesh fence around it but it can be viewed clearly from all sides. The well provides views over the Kimmeridge Ledges and of coast where bedrock extends at least half a kilometre out to sea under the waves.

References

{{Jurassic Coast Isle of Purbeck Jurassic Coast Geology of Dorset Oil fields of England

Location

History

See also

References