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Offshore North Caspian Sea Contract Area (Kashagan Oil Field and Others)

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Contract area(block) Project status Venture company(established) Interest owned(*Operator)
(As of June 30, 2017)
Offshore North Caspian Sea In production
-Crude oil: 55Mbbld
-Natural gas: 96MMcf/d
INPEX North Caspian Sea, Ltd.
(August 6, 1998)
INPEX North Caspian Sea 7.56%
Eni 16.81%
ExxonMobil 16.81%
KMG 16.87%
Shell 16.81%
TOTAL 16.81%
CNPC 8.33%
Kashagan Oil Field

In September 1998, INPEX acquired an interest in the Offshore North Caspian Sea Contract Area in Kazakhstan’s territorial waters. The Offshore North Caspian Sea Contract Area consists of two blocks: the East Block is about 4,300 km2 and the West Block is about 1,275 km2 in area (for a total of about 5,575 km2). The Kashagan Oil Field, which is in the East Block, is located in the Caspian Sea at depths of 3–5 m and is approximately 75 km southeast of Atyrau, Kazakhstan.

Since the first exploratory well was drilled in September 1999, the Kashagan Oil Field was confirmed in 2000 and commercial discoveries were announced in 2002. After development work, the Kashagan Oil Field began producing crude oil in September 2013. Production was temporarily halted due to a pipeline gas loak, but production resumed shortly thereafter. Shipments of crude oil commenced in October 2016. Besides the Kashagan field, the presence of hydrocarbon reserves was also confirmed in the surrounding Kalamkas, Aktote and Kairan structures. Appraisal of these three structures is continuing in parallel with the development of the main Kashagan field with a view to expanding the total production of the contract area.

Kashagan Oil Field

Offshore facility

ACG Oil Fields

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Contract area(block) Project status
(production on the basis of all fields and average rate of the first half of year)
Venture company(established) Interest owned(*Operator)
(As of September 30, 2017)
ACG In production
-Crude oil: 589 Mbbld
INPEX Southwest Caspian Sea, Ltd.
(January 29, 1999)
INPEX Southwest Caspian Sea 9.31%
BP* 30.37%
SOCAR 25.00%
Chevron 9.57%
Statoil 7.27%
ExxonMobil 6.79%
TPAO 5.75%
Itochu 3.65%
ONGC 2.31%

INPEX acquired an interest in the Azeri-Chirag-Gunashli (ACG) Oil Fields in a region of the south Caspian Sea in Azerbaijan in April 2003. At the ACG Oil Fields, oil is being produced at the Chirag, the Central Azeri, the West Azeri, the East Azeri, the Deepwater Gunashli and the West Chirag.


photo:ACG Oil Field

Offshore production facilities

BTC Pipeline Project

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Contract Area Venture Company(established) Interest Owned(*Operator)
(As of June 30, 2017)
BTC Pipeline INPEX BTC Pipeline, Ltd.
(October 16, 2002)
INPEX 2.50%
BP* 30.10%
Azerbaijan (BTC) Limited 25.00%
Chevron 8.90%
Statoil 8.71%
TPAO 6.53%
Eni 5.00%
TOTAL 5.00%
Itochu 3.40%
CIECO 2.50%
ONGC 2.36%

The 1,770-km BTC pipeline stretches from Baku in Azerbaijan on the coast of the Caspian Sea to Ceyhan in Turkey. Full-scale operation commenced in June 2006. Total transportation capacity stands at 1.2 million barrels per day, mainly for crude oil produced in the ACG Oil Fields in Azerbaijan.


BTC pipeline

Shipping Terminal

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