Energy is ADCO’s business, as it provides fossil fuels that power the world. ADCO also consumes energy and this philosophy is expressed through the Energy Management Policy put in place. Some of ADCO’s strategies to become energy sustainable include the following:
- Improve energy efficiency by 25% from the 2010 baseline by end of 2025.
- Increase reliance on renewable energy sources to achieve 2% share of total energy use by 2025.
- Implement Best Available Techniques (BAT) in energy efficiency in future facilities.
- Construct new buildings with sustainability certifications exceeding the ESTIDAMA Pearl 1 rating.
ADCO is implementing Energy Must Dos to reduce our overall energy consumption (MJ) by 5% per barrel of exported oil (from 2010 baseline 46 MJ/bbl).
ADCO has conducted energy assessment studies and has identified energy saving opportunities which mainly cover:
- Walkthrough to follow up on assets and functions EIO implementation and energy
- Optimized the MOL pump utilization at SHAH: 31,536 GJ saved and 2,000MT of CO2 emissions saved.
- Optimized WI pumps utilization through grouping 5 pumps (interconnection) in ASAB : 44521GJ saved.
- Reduced gas flaring and improve gas compressor operation by removing split range pressure control on 1st & 2nd stage separator at NEB (Al Dabbiya) : 392,860GJ saved and 11,083MT of CO2 emissions saved.
- Improved Gas injection Compressor efficiency and eliminate gas recycling in Bu Hasa by repairing the labyrinth seals: 54,205GJ and 10,883MT of CO2 emissions saved.
- Optimized the energy use of lighting and HVAC in ADCO main tower: 2,250 GJ saved.
- Indirect energy saving of 2,916,958 GJ due to importing power from the utility company ADWEA, which operates with higher efficiency (40%), compared to onsite power generation.
- ISO 50001 Surveillance Audits Passed.
- Energy Review Studies were conducted for each new development (13 new projects).
- Over 1,000 persons were trained throughout the energy awareness campaign.
ADCO is well aware of the fact that climate change is a global concern with potentially major consequences for the society and energy industry. To grow the business and help meet the increasing demand for energy, ADCO is constantly challenged with finding ways to do so with minimal negative impact on the environment. ADCO realizes the impact its line of business has on the global climate as well as the risks climate change can impose on the business. ADCO takes action to assess those challenges by developing new, industry leading technologies and processes that will reduce its contribution to climate change and its effects on the operations.
An ADCO Initiative
CO2 Injection Project
In November 2013, ADNOC and Masdar signed a joint venture agreement, the first focused on exploring and developing commercial-scale projects for Carbon Capture, Usage and Storage (CCUS) in the Middle East. The pilot for the project was initiated by ADCO in 2009 to technically assess the value of CO2 in terms of Enhanced Oil
Recovery (EOR). The project consists of three core components. First, CO2 will be captured onsite at Emirates Steel, the UAE’s largest steel production facility. Second, the CO2 will be compressed and transported along a 50-km pipeline to ADCO operated oil fields in Bab and Rumaitha. CO2 will be injected into oil reservoirs to enhance oil recovery, while storing the injected CO2 underground. The project will sequester up to 800,000 tonnes of CO2 annually. Commissioning of the project is scheduled for end of 2016.
Biodiversity risk assessments have been conducted on ADCO operating areas in the past, and found that three of ADCO sites have the potential to pose a significant biodiversity risk. Biodiversity Action Plans were created and implemented, with actions such as:
- Integrating assessment of impacts to biodiversity into ADCO HSEIA process.
- Determine biodiversity risk in the concession areas, prioritizing habitats and species.
- Setting targets for conserving habitats and species.
- Conducting monitoring activities.
- Circulating reports internally and to shareholders.
- Delivering training on ecology and biodiversity conservation to environmental engineers.
- Protected Sabkha areas and signage indicating the importance of the habitat.
- Constructed Osprey breeding platforms in coastal assets.
- Erected fencing in main areas to avoid the entry of sand gazelles into Qusahwira field.
Waste and Water Management
ADCO has a policy of no surface water discharge. Waste water streams are handled as follows:
- Sewage water was recycled and used for irrigation.
- Process effluent, comprising crude wash and closed drain water, as well as produced water were treated in oil skimmers to recover oil before injecting into deep aquifer through disposal wells.
- Water-based mud was disposed into dedicated disposal wells.
- Plant and rig-wash was disposed to land where water evaporated.
Drilling Muds & Cuttings
ADCO had established a state of art Thermal Desorption Unit (TDU) in Habshan for treatment of Oil Based Mud (OBM) drill cuttings resulting from drilling operations to recover the oil from cuttings. Further the treated cuttings are used for beneficial uses such as filling low lying areas, road making etc.
The water based mud and brine is recycled between the wells and residual one is injected into two dedicated disposal wells (Sahil and Bab/Buhasa).
Hydrocarbon tank-bottom sludge, contaminated soils from oil spills, mixed chemical wastes, and other hazardous wastes were transferred to BeAAT Hazardous Waste Treatment and Disposal Facility. Medical wastes from ADCO clinic were sent to incinerator for treatment and disposal by medical waste contractor.
General recyclable waste such as paper, cardboard, plastic and metals were segregated in colour-coded skips from the source and transferred to designated recycling companies by ADCO waste management contractors. Scrap metals including empty drums have been frequently collected in the fields during Friday desert cleanup campaign and sold to 3rd party recycling company.
Non-recyclable wastes including food and garden wastes were collected by ADCO waste management contractor and transferred to municipal landfill for disposal.
Air quality and Emissions Management
Minimization of gas flaring continues to be a high priority for ADCO. In the past years, flaring quantities have been reduced significantly due to implantation of various flaring reduction initiatives in both operations and drilling.
Gas Flaring reduction in operational Fields:
Installation of Vapour Recovery Compressors for Flow suction Tanks (FST) and Disposal water Tanks (DWT) in ADCO fields.
- Proper design and installation of flare system in all fields with Knock out drum for collection of liquids.
- Multiple pilots and Back up ignition system to avoid venting.
- Purge and seal gases by Nitrogen gas.
- Smokeless design and operated for 99% destruction efficiency.
- Closed flare systems are considered in all new projects and facility upgrades.
- The zero flaring philosophy except pilot gas burning during normal operations is implemented in all fields and new projects.
Drilling and Rigless operations
- Prohibition of cold venting.
- Recovery of liquids and no oil flaring from well flaring and cleaning wells.
- Test separator for separation of gas and use of green burner for efficient combustion.
Power strategy to maximize ADWEA power import and stoppage of on-site power generating units
Gas turbines are the major source of air emissions in ADCO fields and accounts for as much as 70% of total CO2 emissions. Thermal efficiency of ADCO Gas Turbines is lower (< 30%) due to single cycle design when compared to combined cycle of Abu Dhabi Water and Electricity Authority.
In order to improve the energy efficiency and to further reduce the direct greenhouse gas emissions from ADCO operations, ADCO management taken a strategic decision to maximize power import from ADWEA and early decommissioning of the on-site Gas Turbines.
Power import performance tests from ADWEA grid were conducted and upon on successful results, a new power generation operating philosophy (reduction in the power generation by half and compensating from ADWEA) has been successfully implemented since 2010.
The onsite Turbines will be completely shut down in 2017 by the time ADWEA electrical network is reinforced.
How is ADCO Doing?
Environment and Energy Campaigns
Over the past years and in continuous efforts to raise environment awareness among employees, contractors and the public, ADCO has carried out numerous campaigns which aimed to educate people on the importance of the natural resources and the vital roles they play to ensure preservation of such resources. ADCO continues to be fully committed towards the concept of sustainability and ensures it is implemented in its day to day activities.
List of Environment and Energy Related Campaigns which took place in ADCO:
- Release of Green Turtles in NEB field.
- Clean-up Campaigns across all ADCO fields.
- Turn it off Campaign.
- Rashed Campaign.
- Green Office Campaign.
- Participation in the annual Earth Hour.
- Biodiversity Awareness in ADCO concession areas.