Shell and Gasco study Bab Sour Gas Development
The international oil company (IOC) Royal Dutch Shell plc (Shell) and the Abu Dhabi National Oil Company (ADNOC) subsidiary Abu Dhabi Gas Industries (Gasco) are preparing the front end engineering and design (FEED) work for the non-associated gas Bab Sour Gas Field Development project in the United Arab Emirates (UAE).
Located 150 kilometers southwest of Abu Dhabi, Bab is one of the largest gas field in Abu Dhabi.
Despite its easy access as onshore field, Bab has always stood as a challenging reservoir because of its high concentration of hydrogen sulfide (H2S) and carbon dioxide (CO2).
If Abu Dhabi is an Emirates rich of oil, it is permanently running short of gas as its consumption is now exceeding the production for years.
Except Iran, Iraq and Qatar, most of the Gulf countries are struggling to produce natural gas at the scale of their needs, mostly to generate electricity or desalinate sea water and to feed their petrochemical industry.
In this context the development of the Bab Sour Gas field has stood on the top of ADNOC projects list for a decade to find out the viable solutions to overcome the sulfide and CO2 issues.
In Bab the gas contains no less than 50% of carbon dioxide and 15% of extremely aggressive hydrogen sulfide.
– Shell 40% is the operator
– ADNOC 60%
Shell and ADNOC completed Bab Sour Gas pre-FEED
From the conclusion of this pre-FEED work, the Bab Sour Gas project should require $11 billion capital expenditure to produce up to 1 billion cubic feet per day.
The high content of H2S is turning the Bab Sour Gas project into a daily challenge that requires specific processes to treat the CO2 and the H2S and to handle the high quantity of sulfur that will result from the gas treatment.
In that respect the Bab Sour Gas Development project should include:
– Gas processing facility
– Gas treatment
– Sulfur recovery unit and Sulfur handling facilities
– Gas gathering system
– Gas tanks farm
All these additional equipment and related safety requirements contribute to escalate the costs of the Bab Sour Gas Development project.
In a context where the oil and gas prices tend to free fall the decision from the Shell – ADNOC joint venture to prepare the FEED reflects the confidence of these companies to develop Bab Sour Gas project with the technologies to be competitive and in a long term perspective where energy costs can only go up.