Marjan Complex is a producing conventional oil field located in shallow water in Saudi Arabia and is operated by Saudi Arabian Oil. The field is located in block Saudi Aramco Concession Area.

Two expansion projects are associated with the Marjan Complex conventional oil field, namely Marjan Expansion and Lawhah Development. The expansion projects are currently in the construction stage.

Field participation details

The field is owned by Saudi Arabian Oil.

Production from Marjan Complex

The Marjan Complex conventional oil field recovered 28.49% of its total recoverable reserves, with peak production expected in 2027. The peak production will approximately 784 thousand bpd of crude oil and condensate, 627 Mmcfd of natural gas and 352.8 thousand bpd of natural gas liquids. Based on economic assumptions, production will continue until the field reaches its economic limit in 2068. The field currently accounts for approximately 4% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 18,948.98 Mmboe, comprised of 12,706.51 Mmbbl of crude oil & condensate, 10,405.79 bcf of natural gas reserves and 4,508.17 Mmbbl of natural gas liquid reserves. Marjan Complex conventional oil field reserves accounts 4.11% of total remaining reserves of producing conventional oil fields globally.

Contractors involved in the Marjan Complex conventional oil field

Some of the key contractors involved in the Marjan Complex project as follows.

Design/FEED Engineering: John Wood Group, John Wood Group and Worley

Main EPC: China National Offshore Oil, Hyundai Motor Group, Lamprell, Larsen & Toubro and Larsen & Toubro

EPC Contractors: Al Shalawi International Holding, IMCC Investment, KTL Global, McDermott International and National Marine Dredging

Other Contractors: 3W Networks, Acteon Group, Ampo Poyam Valves, Baker Hughes and Heerema International Group Services

About Saudi Arabian Oil

Saudi Arabian Oil Co (Saudi Aramco) is a state owned energy and chemical company. It carries out the exploration, production and processing of crude oil and natural gas, refining, fractionation of natural gas, production of petrochemicals, and distribution of petroleum products and natural gas. The company operates wholly-owned domestic refineries, and has interests in joint venture refineries with international partners. Saudi Aramco operates through a network of pipelines, bulk plants, air refueling sites and terminals. The company also operates power plants and associated transmission and distribution facilities in the Kingdom of Saudi Arabia. The company has subsidiaries and joint ventures across the Americas, Europe and other regions. Saudi Aramco is headquartered in Dhahran, Eastern Province, Saudi Arabia.


Information on the field is sourced from GlobalData’s fields database that provides detailed information on all producing, announced and planned oil and gas fields globally. Not all companies mentioned in the article may be currently existing due to their merger or acquisition or business closure.