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Abu Dhabi - ADCO's Operations.

In ADCO's area, a 60/40 JV was formed in late April 2013 of ADNOC and Shell to develop Bab's huge ultra-sour gas reservoir in a $10bn project. The 30-year JV was the largest deal for Shell in Abu Dhabi. Shell had been operating in Abu Dhabi since before the formation of the UAE. The JV will produce 520 MCF/d of sales gas - after extensive processing - by 2018.

In November 2014, the $11bn Shah ultra-sour gas project went on stream. This is producing over 500,000 MCF/d of sales gas after processing.

ADNOC's expansion of the Integrated Gas Development will be completed by 2019. This will increase offshore gas production to 1.6 BCF/d from 1 BCF/d now.

Bu Hasa, found in 1962, is ADCO's biggest oilfield. It has been expanded from 400,000 b/d in 2010 to 580,000 b/d, under a huge gas injection programme for both Bu Hasa and Sahil fields. Bu Hasa is to be expanded further to reach 650,000 b/d by 2018 under the most advanced EOR system in the world (see gmt2AbuDfieldsJan7-13).

The new system will be in addition to an existing EOR facility. Both will be necessary as the water content at Bu Hasa in early 2003 was estimated to be rising above 30%. The first EOR system enabled the field to produce up to 580,000 b/d by late 2014. The water cut had reduced reservoir pressure.

In a related project, four units and Bu Hasa's instrumentation and control system have been upgraded.

Abu Dhabi Gas Industries Co. (GASCO) - owned by ADNOC, Shell, Total and Partex - in 2003 contracted Larsen & Toubro of India to upgrade and modify the gas-gathering system and related facilities at Bu Hasa. This now handles up to 65 MCF/d of additional gas.

Huwaila, a small satellite field just south of Bu Hasa, had been developed to a capacity of 10,000 b/d now part of the giant field. Its crude oil is pumped to Bu Hasa by pipeline. It is to being expanded to 20,000 b/d.

Asab, found in 1965, is ADCO's second biggest field, but its capacity is limited to 260,000 b/d. Asab is also rich in very sour gas. VECO in late 2004 won a $40m EPC contract for an Asab water injection system to improve reservoir pressure.

Shah, found in 1966 but developed in 1990/91, has a capacity of 60,000 b/d. Sahil, found in 1967, has a capacity of 70,000 b/d. The crudes from both fields are processed at a central facility at Asab which has a spare capacity. Both fields are being developed to a combined capacity of 140,000 b/d by 2018. Shah has a huge field of ultra-sour gas which has been developed on a full scale for a JV which has invested $11bn (see omt2AbuDfields12Jan15).

All these fields have gas-rich Arab and Thamama Fms, the basis of a major onshore gas development programme. They provide gas to local power plants and GASCO at Ruwais.

ADCO's North-East Abu Dhabi (NEAD) oilfields - Rumaitha (found in 1969), al-Dabb'iya (1970s), and their satellite Shanayel (1983) - came on stream in 2000 at a total rate of 10,000 b/d. They have been developed to 150,000 b/d. Most of their output is being supplied to the Umm al-Nar oil refinery.

GASCO having become in charge of the gas sector and its projects, had take up Asab gas plant operations from ADNOC since March 2004, leading to further enhancement of its position as one of the largest gas-processing companies in the Middle East and one of the biggest industrial projects in the UAE. GASCO operates five onshore plants in Abu Dhabi: the Habshan-Bab gas complex, including the Habshan gas plant and Bab gas plant; the Bu Hasa NGL plant, the Asab NGL plant, the Ruwais NGL plant and the Asab gas facility.

Asab's is a gas-cycling plant with two trains having a total capacity of 826 MCF/d. After condensate separation, the gas is compressed and re-injected into the reservoir. Stabilised condensate is shipped to the refineries of ADNOC's unit Takreer (see down2AbuDrefPetch12Jan15).

OGD-3/AGD-2 helped raise Abu Dhabi's gas output to 7,500 MCF/d in 2014. Abu Dhabi's LPG output has risen to 12m t/y. Production of ethane for the petrochemicals industry has been tripled. Of GASCO's major gas plants in Abu Dhabi for processing associated and non-associated gases, the largest is at Habshan which has a capacity of 3,500 MCF/d, followed by Bab's.

The Habshan plant produces 6,800 t/d of NGL, while NGL produced at Bab is transported to the Ruwais processing plant for fractionation. GASCO has expanded the Asab gas plant and this has raised feed gas processing capacity through a central degassing and debottlenecking.

GASCO has developed the onshore portion of its integrated gas development (IGD), which has significantly boosted Abu Dhabi's gas production (see the background in gmt2AbuDfieldsJan7-13).
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Publication:APS Review Gas Market Trends
Geographic Code:7UNIT
Date:Jan 19, 2015
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