The Karish and Tanin natural gas fields are located in the Levant Basin of the Mediterranean Sea, offshore Israel. Both fields are owned by Energean Oil and Gas’s subsidiary Energean Israel.
The two fields were discovered by Noble Energy and acquired by Energean Oil and Gas in December 2016.
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The field development plan for the project was submitted in June 2017 and subsequently approved by the Israeli Petroleum Commissioner in August 2017.
Energean took the final investment decision on the $1.6bn project in March 2018. First gas from the Karish field was delivered in October 2022.
The fields are expected to jointly supply an estimated 88 billion cubic metres of natural gas and 44 million barrels of liquids to the regional Israeli market, as well as international markets.
Tanin field location and discovery
The Tanin field lies in the Alon A licence 13 miles (21km) northwest of the Tamar field in 5,100ft of water.
It was discovered in February 2012 by the Tanin discovery well, drilled at a depth of 18,212ft.
The well encountered 130ft of net gas pay in the high-quality lower Miocene sands.
Karish field location and discovery
The Karish field lies in the Alon C licence 20 miles (32km) northeast of the Tamar field in 5,700ft of water.
It was discovered in May 2013 by the Karish discovery well, drilled to a depth of 15,783ft by the Ensco 5006 rig.
The well encountered 184ft of net gas pay in the high-quality lower Miocene sands.
Reserves of the Karish and Tanin fields
The Karish field is estimated to contain 1.41 trillion cubic feet (tcf) of gas, 61 million barrels of liquids or 317 million barrels of oil equivalent (Mboe).
The Tanin field is estimated to hold 921 billion cubic feet (bcf) of gas and 4.5 million barrels of liquids or 171.7Mboe.
Field development plan for Karish and Tanin
The Karish area development plan includes the development of the Karish field as it is the largest discovery, followed by the Karish North and Tanin fields.
The Karish field development involved the drilling of three wells: Karish Main-01, Karish Main-02 and Karish Main-03. First gas was produced from the Karish Main-02 well.
All the wells are tied back to a floating production storage and offloading (FPSO) unit installed at the Karish field.
The wells were drilled using the Stena Forth DP Class 3 ultra-deepwater vessel.
Six wells are planned to be drilled at the Tanin field in the future.
Karish and Tanin FPSO details
The Karish and Tanin FPSO is a spread-moored vessel installed approximately 90km from shore. It has a 227m-long and 50m-wide hull.
The total oil storage capacity of the FPSO is 800,000 barrels and the total gas production capacity is eight billion cubic metres per annum.
First steel for the FPSO was cut in November 2018.
The gas produced by the deepwater project is transported from the FPSO via a 90km pipeline to a landfall point at Dor before being supplied to the Israeli natural gas transmission system.
Contractors involved
TechnipFMC was awarded the front-end engineering and design contract for the Karish and Tanin fields. The company was further awarded the engineering, procurement, construction and installation contract for the subsea system, offshore and onshore pipeline system, and valve station of the field. The scope of the contract also included the design of the FPSO for tie-back of the Tanin field.
Stena Drilling was contracted by Energean Israel to provide the Stena Forth drillship to conduct the drilling activities.
Sembcorp Marine Rigs & Floaters, a subsidiary of Sembcorp Marine, was subcontracted by TechnipFMC to undertake the engineering, procurement and construction works for the hull and living quarters of the FPSO. The scope of the contract also included the fabrication and integration of the topside modules and the installation of owner-furnished equipment.
Elbit Systems won a $15m contract to provide a security solution for the project.
Inocean provided the basic design package for the FPSO marine hull, living quarters and mooring system.
