Класс Месторождения: Крупное
Тип Месторождения: Газовое
Местоположение: Море
Местность:
Стадия разработки: Добыча
Год открытия: 2010
Источник информации:
Метод открытия: Сейсмика
Площадь: 308.95 км²
In December 2010, Noble Energy (NBL) announced a major natural gas discovery at Leviathan, off the shore of Israel. NBL considers the Leviathan gas field to be its “largest exploration discovery” and estimates that it holds 22 Tcf (trillion cubic feet) of recoverable natural gas resources. The company believes this massive discovery positions Israel as a “natural gas exporting nation.”
The field is jointly owned by Ratio Energies, Chevron Mediterranean, and NewMed Energy with 15%, 39.66%, and 45.34% working interests, respectively. Chevron became the field’s operator with the acquisition of Noble Energy, the field’s previous operator, in June 2020.
The Leviathan-1 Well drilled in a water depth of 1,645 m to a total depth of 7,200 m. Formation logs identified over 67 m of net gas pay in several high-quality Lower Miocene sandstone reservoirs.
Source Rock: The Lower Miocene (or Oligo-Miocene) contains the main biogenic gas of shale.
Reservoir: The Oligocene-Miocene reservoir section in leviathan field is a sequence of Deep water turbidate sandstone interbeded with variable amounts of siltstone and mudstone. Clean end member sands are quartz arenites (>=95% quartz), with porosity >20% and permeability> 500 mD.
Seal (Cap rock): Regional seal of Missinian Evaporities in upper Miocene this salinity crisis is an important event in the Mediterranean basin. The thick evaporit deposits (up to 2000m thick), that were deposited during a Late Miocene of the Mediterranean Sea.
Trap: The trap is Syrian arc fold and uplifted structures and normal fault.
Seismic section of Leviathan -1 field from field showing petroleum system of Levantine basin. ( 2018, Delek - Energy website)
Drilling of the Leviathan-2 well started in March 2011 by the Pride North America rig. The drilling operations, however, had to be stopped after detecting a flow of water in the well hole.
Drilling of the Leviathan-3 well commenced in June 2011 and was successfully completed in December of that year. The third well was located approximately 5km east of the original Leviathan discovery and was drilled to a total depth of 5,226m, encountering a minimum of 88m natural gas pay.
The final investment decision on the $3.75bn Phase 1A development of the field was taken in February 2017. The first production from Phase 1A commenced in December 2019. Phase 1B of the Leviathan field will increase gas production capacity from the field from 12bcm a year to 21bcm a year. The project was assigned a budget of $96.4m by the partners for executing the preliminary front-end engineering and design (pre-FEED) in February 2023. The development of the Leviathan field is in line with the Israeli Ministry of Energy’s vision to replace coal as an electricity-generating fuel by 2025.
Leviathan gas field development details
The Leviathan field is being developed in two phases – Phase 1A and Phase 1B.
Phase 1A of the Leviathan field is being developed by four subsea wells, a production platform, and two pipelines. The wells drilled to an average depth of 5km below the sea level are connected to a subsea manifold and an offshore platform through two 120km subsea pipelines. Each well has a production capacity of more than 300 million cubic feet per day (mcf/d). A fifth production well, Leviathan-8, was drilled in the I/14 Leviathan South lease of the field in June 2022 to boost production from the field. The well targeted the Oligo-Miocene age layer of the Leviathan reservoir. It was connected to the existing subsea system and commenced production in June 2023.
Phase 1B will include three additional wells, related subsea systems along with a regional export module that will be installed on the platform. The module will enable gas to be transported to a floating liquified natural gas facility or a regional export pipeline.
In February 2017, after intensive evaluation of the 330 sqkm field, the Leviathan partners took a final investment decision on executing Phase 1A of the field's development plan, with an annual production capacity of 12 BCM. Production of natural gas from Leviathan began on December 31, 2019, on time and on budget, and since has become a cornerstone of gas supply in Israel, Egypt and Jordan.
https://newmedenergy.com/operations/leviathan/
Leviathan production platform details
The production platform is situated some 10km from the west coast of Israel. The 16-pile platform is installed at a water depth of 86m and includes a domestic supply module along with a monoethylene glycol reclamation unit, a liquid storage module and living quarters. The natural gas is processed and treated at the platform before being sent to the Israel natural gas transmission system.
Gas transportation details
The natural gas produced at the production platform is sent via a gas pipeline onshore to Dor Beach and to the Israeli national grid for further distribution to clients in Israel, Egypt, and Jordan. In July 2023, the final investment decision for laying a third subsea transmission gas pipeline with an estimated investment of $568m was made. The new subsea gas pipeline will allow the expansion of the gas supply from the field to Israel Natural Gas Lines’ transmission system from 1.2bcf/d to 1.4bcf/d by 2025.
https://www.offshore-technology.com/projects/leviathan-gas-field-levantine-israel/?cf-view
Следующее Месторождение: Salmah South