Projects

Uthmaniyah CO2-EOR Demonstration Project

PROJECT PROPONENTS:

Capture, Transport and Storage: Saudi Aramco

LOCATION: Eastern Province of the Kingdom of Saudi Arabia

COcapture source: Hawiyah Natural Gas Liquids (NGL) Recovery Plant

COstorage site: small part of Uthmaniyah production unit (Ghawar oil field)

INDUSTRY (FEEDSTOCK): Natural gas processing (natural gas)

OVERALL PROJECT LIFECYCLE STAGE: Operate

CO2 CAPTURE CAPACITY VOLUME: 0.8 million tonnes per annum (Mtpa)

CAPTURE TYPE:  Natural gas processing

CAPTURE METHOD: Almost pure CO2 stream is dehydrated and compressed

NEW BUILD OR RETROFIT: Retrofit (to an existing plant)

COCAPTURE START DATE: July 2015

PRIMARY STORAGE OPTION: Enhanced oil recovery and sequestration

STORAGE FORMATION AND DEPTH: Jurassic organic-rich mudstones at a depth of between 1,800-2,100 metres / 6,000-7,000 feet

TRANSPORTATION TYPE: Pipeline (onshore to onshore)

TRANSPORTATION DISTANCE TO STORAGE SITE (LENGTH OF PIPELINE): 85 km / 52 miles


Project description

The Uthmaniyah CO2-EOR Demonstration Project is located in a small area at the Uthmaniyah production unit, which forms part of the giant Ghawar field (the largest oil field on Earth - 280 km / 174 miles long and 40 km / 16 miles wide, encompassing 1.3 million acres). The Ghawar field is estimated to produce around five million barrels of oil per day as well as approximately 2.5 billion cubic feet / 475,000 barrels of oil equivalent of natural gas per day. Ghawar’s main oil reservoir is the 100-metre thick Arab-D reservoir. The Kingdom of Saudi Arabia has abundant conventional hydrocarbon reserves and EOR is not likely to be required at production scale for decades to come.

This CO2-EOR demonstration project compresses and dehydrates CO2 from the Hawiyah NGL (natural gas liquids) Recovery Plant, then transport the CO2 stream 85 km / 52 miles to the injection site (a small flooded area in the Uthmaniyah production unit). The injection strategy consists of:

  • Injection of approximately  40 million standard cubic feet per day of CO2 (around 0.8 Mtpa);
  • Four injection wells, four producer wells and two observation wells;
  • Alternating water and gas (WAG) cycle of one month CO2 / one month water;
  • Well spacing of around 600 metres / 2,000 feet; and
  • CO2 switching between wells

The objectives of the demonstration project are described as:

  • Determination of incremental oil recovery (beyond waterflooding);
  • Estimation of sequestered CO2;
  • Addressing primary risks and uncertainties, including migration of CO2 within the reservoir, and
  • Identifying operational concerns

Operation of the project commenced in July 2015 (see media statement here).The project duration is expected to be three to five years. The design of the CO2-EOR project is based on reservoir simulation studies and has a comprehensive monitoring and surveillance plan, including routine and advanced logging and use of new technologies for plume tracking and for CO2 saturation modelling (seismic, chemical tracers, and electromagnetic surveys and borehole gravimetry). 

Latitude: 25.0051

Longitude: 49.1578

Project data is current as at 26/05/2016