On the level of Productivity and Development projects ofthe field
The United Arab Emirates and the State of Qatar are bothmain Oil & Gas producing countries situated on the south eastern of Arabian Gulf. Their Highness Shaikh Khalifa Bin Zayed Al-Nahyan, President of UAE, andShaikh Tamim Bin Hamad Bin Khalifa Al-Thani, The Amir of Qatar, pursuing a wiseand prudent policy supported by affluent oil & gas reserves, have led theircountries along the path to modernization. They are presently ranked at the toplist of wealth countries and among the most prosperous countries in the world.
Abu Dhabi, the capital of the United Arab Emirates has been converted into a modern metropolis with an abundance of trees lining itsboulevards and tall buildings standing against its skyline. On the other hand,Doha, the capital of Qatar, continues to retain the appearance of a time honoured metropolis of the region, however, it is too rapidly being converted into a modern cities which boasts a scenic highway along the serene water ofthe Arabian Gulf.
El Bunduq Field was discovered in 1965 by Abu Dhabi MarineAuthority (ADMA). The El-Bunduq field islocated 200 kilometres northwest and 100 kilometres of the shores of Abu Dhabiand Doha respectively, straddling the offshore boundary of the two Arabicstates. The efficient manner in which the field has been developed and operatedto date has contributed, in its own way, to the prosperity of the two hoststates and the well-being of their citizens.
Hydrocarbons in the U. A. E. and Qatar have been foundwidely in the geologic column, from the Triassic and Jurassic. The Thamamagroup, Arab Formations and Mishrif Formation are known as most prolificreservoirs in the region. In addition, the Khuff and Pre-Khuff Formation havepotential of large reserves of Gas.
Energy’s optimum usage
In El-Bunduq field, oil has been produced from both D and Clayers of the Upper Jurassic, Arab Formation. The Arab D layer is mainlycomposed of a carbonated sequence (limestone/dolomite), being underlain by theDiyab Formation and is overlain by alternation of carbonate and evaporates(Anhydrite) layer of Arab C formation. The anhydrites are seal rock for oilvertical migration; hence act as effective cap rock for the carbonatereservoirs of the D and C . The Arab oils are structurally trapped in the fieldand its structure has a domes configuration, which is believed to have resultedfrom the tectonic deep seated Hormuz salt diaprisim. A Future UAE& Qatarjoint project of Khuff and Pre Khuff for deep gas exploration is undergoing.
Crude oil which is recovered from 28 production wells atwellhead platform is conveyed through a 27 kilometres pipeline to the DasIsland terminal from the Central Platform installed in the centre of the field.El-Bunduq’s crude bears a close resemblance to crude from the Zakum field incharacteristics. Hence, the two are blended and stored together in crude tankson Das Island and then called “Lower Zakum Crude”. Crude oil tankers which loadthe Arab oil at Das traverse the Indian Ocean after leaving the Gulf and findtheir way to various oil refineries in Japan.
From the view point of reservoir conservation and efficientdevelopment of the field, Bunduq Company commenced an expeditious secondaryrecovery scheme, which is a means of recovering crude more efficiently andimproving the recovery factor. The method implemented by Bunduq is so called“Alternating Line Drive Pattern” which places injectors and producersalternately, injecting chemically treated seawater into the reservoir. BunduqCompany’s secondary recovery facilities comprise 28 producers and 23 injectors,a living quarters platform (LQP), water injection platform )WIP), centralcollector platform (CCP), gas sweetening platform (GSP) and flare stack, alllocated offshore in the centre of the field.
Actual engineering, fabrication, etc. of the relatedfacilities commenced in January 1981 and required three years for the majorcomponents to be installed. Consequently, oil production and water injectioncommenced in November 1983 and in January 1984 respectively.
The Arab D formation is the main reservoir of El-Bunduq.However, drilling operations under the secondary recovery scheme proved thatthe Arab C formation situated immediately above Arab D zone was also oilbearing. The ‘Production tests’ of the Arab C formation was commenced in January1984. Afterwards, the drilling of threeinjection wells, installation of a jacket for injection wells previouslydrilled, wellhead works and pipe-laying were completed and the actual waterinjection was initiated in August 1987. The Uwainut reservoir is situatedunderneath the Arab reservoirs.
The existence of the El-Bunduq field was confirmed by AbuDhabi Marine offshore operations (ADMA), the owner of the concession at thattime, by the drilling of well No. 1 in 1964. In July 1970, Bunduq Company Limitedwas established with the equity shared between BP and CFP (TOTAL) on a 2/3, 1/3basis and with Bunduq Company inheriting the El-Bunduq concession. In December1970, United Petroleum Development Company Limited (UPD) acquired one half ofBP's share in the company resulting in BP, TOTAL and UPD possessing a thirdeach of Bunduq Company shares.
As development funds were concerned, BP and UPD each agreedto shoulder 50% of the cost, whereas TOTAL opted to remain dormant. Wells No. 3and 4 were drilled during 1971 and 1972, going on to No. 7 and installing crudeprocessing facilities on Das Island by November 1975.
Construction of the facilities under the secondary recoveryscheme was carried out from 1981 to 1983, and the outlay for the scheme was tobe 97% by UPD and the balance of 3% by BP. Subsequent to the completion of thesecondary recovery scheme, production recommenced in November 1983, productionfigure surpassed the 200,000,000 barrels mark in March 2006 (inclusive ofproduction under primary recovery).
Water injection commenced in January 1984. The production ofcrude and injection of water is skilfully handled by experienced personnel.
The gas injection platform is the new addition to ouroffshore complex in 2005. Gas injection scheme aims to minimize gas flaring atthe field while enhancing oil recovery. 40MCF of associated gas are reinjecteddaily in the Arab reservoirs through two wells, EB-48 & EB-14A.
Early, 2015, after finding certain achievements in El Bunduqfield, the two companies agreed to transfer the full management responsibilities to the United Petroleum Development Company Limited (UPD) whohas acquired the BP 3% share in El Bunduq field and become the owner of thetotal 100% shares of Bunduq Company with generosity and support of both UAE and Qatar government.