ZADCO

The Concession

The Emirate of Abu Dhabi, the largest of the seven Emirates of the United Arab Emirates, lies along the southern coast of the Arabian Gulf.
Commercial quantities of oil in Abu Dhabi were first discovered offshore in September 1958, at Umm Shaif some 150 kilometers from the capital. Discovery of oil in commercial quantities onshore followed in August 1959 at Murban (now known as Bab), which lies in the desert some 100 kilometers to the southwest of the capital. Since that time numerous oil fields, large and small, have been discovered both onshore and offshore.
JODCO's involvement in the petroleum industry in Abu Dhabi started in 1973 with its participation in the Umm Shaif and the Lower Zakum fields within the Abu Dhabi Marine Areas (ADMA) concession, in partnership with the Abu Dhabi National Oil Company (ADNOC), British Petroleum (now BP) of Great Britain, and CFP (now TOTAL) of France.

A few years later, JODCO joined in the development of three oil fields with ADNOC; the Upper Zakum field in 1977, the Umm Al Dalkh in 1978 and the Satah field in 1980. Successful production from these three fields began during the 1980s.
Three Operating Companies were set up for the projects: the Abu Dhabi Marine Areas Operating Company (ADMA-OPCO) in 1977 to operate ADMA concession including the Umm Shaif and the Lower Zakum fields, the Zakum Development Company (ZADCO) in 1977 to develop the Upper Zakum field, and the Umm Al Dalkh Development Company (UDECO) in 1978 to develop the Umm Al Dalkh and the Satah fields. The activities of UDECO were later amalgamated with ZADCO in 1988 in order to optimize operation control and minimize costs.

ADMA-OPCO

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ADMA-OPCO

Abu Dhabi Marine Operating Company
Date of establishment : July 1977
Objectives of the Company: To develop the Umm Shaif and the Lower Zakum oil fields and to explore for crude oil in the ADMA concession

Oil Field Shareholders Location Start of production
Umm Shaif ADNOC  60%
BP        14 2/3%
TOTAL  13 1/3%
JODCO  12%
140km offshore, north-west of Abu Dhabi City 1962
Lower Zakum ADNOC   60%
BP        14 2/3%
TOTAL  13 1/3%
JODCO  12%
80km offshore, north-west of Abu Dhabi City 1967
Umm Lulu ADNOC   60%
BP        14 2/3%
TOTAL  13 1/3%
JODCO  12%
30km offshore, north-west of Abu Dhabi City 2014
Nasr ADNOC   60%
BP        14 2/3%
TOTAL  13 1/3%
JODCO  12%
130km offshore, north-west of Abu Dhabi City 2015

ADMA-OPCO's producing fields are the Umm Shaif, the Lower Zakum, the Umm Lulu and the Nasr oil fields. Lower Zakum crude oil is gathered at the Zakum Western Super Complex and then pumped directly via a 90 kilometer-long subsea pipeline to the oil processing and export terminal at Das Island. Umm Shaif crude oil flows 35 kilometers under its own pressure to Das Island.
Water injection to maintain reservoir pressure has been applied at the Umm Shaif oil field since 1976 and at the Lower Zakum oil field since 1978. The reservoir pressure support program has been augmented by crestal gas injection in the Umm Shaif oil field since 1994 and in the Lower Zakum oil field since 2005.
JODCO and its partners have started early production from the Umm Lulu and the Nasr oil fields, and the full field development of the two fields is currently in progress.

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ZADCO

Zakum Development Company
Date of establishment : November 1977
Objectives of the company : To develop the Upper Zakum, the Umm Al-Dalkh and the Satah oil fields.
To explore and develop the Jarnain and the Dalma structures

Oil Field Shareholders Location Start of production
Upper Zakum ADNOC      60%
ExxonMobil 28%
JODCO      12%
80km offshore, north-west of Abu Dhabi city 1982
Umm Al-Dalkh ADNOC  88%
JODCO  12%
20km offshore, north-west of Abu Dhabi city 1985
Satah ADNOC  60%
JODCO  40%
180km offshore, north-west of Abu Dhabi city 1987

Crude produced from the Upper Zakum oil field is gathered at the Zakum Central Complex through 3 satellite platforms, then pumped 60 kilometers to Zirku Island Terminal for stabilization, storage and shipping.
Crude oil from the Umm Al Dalkh oil field is gathered at the Central Production Complex and then pumped via the Zakum Central Complex at the Upper Zakum oil field to Zirku Island. Satah Crude is gathered at the Production Manifold Platform in the Satah oil field and flows directly under its own pressure via a 58 kilometer-long pipeline to Zirku Island, where it is treated and degassed prior to loading on tankers.
Water injection has been applied to maintain reservoir pressure since 1984 at the Upper Zakum oil field, and since 1986 at the Umm Al Dalkh oil field. Some oil producing wells at the Umm Al Dalkh oil field are equipped with electric subsea pumps (ESP).
In the Satah oil field, crestal gas injection has been introduced since 1988, and has been augmented by water injection since 1998. Gas injection is currently under temporary suspension due to well integrity issues, but JODCO and its partner are planning to restart it.
Currently, JODCO and its partners are engaged in development work using artificial islands with a view to increasing a production capacity of the Upper Zakum oil field.

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