bordolano bordolano

Underground gas storage: from model to results

Integrated systems for the next generation reservoir planning and management

Read about Bordolano: how we converted a depleted gas reservoir in one of the most technologically advanced storage site in Europe.

Knowing what to look for enables the best results

State of the art seismic surveys and 3D modelling techniques provided in-depth knowledge of the geological and structural setup of the reservoir. Strong and diversified experience gave us an edge in identifying what to look for. We laid the foundations for optimal wells distribution and maximal reservoir performance.

Good planning is half the job, making it happen is our goal.

Our modelling and planning skills guaranteed the stability of the reservoir and allowed to maximize its productivity. By using the most efficient technologies in the treatment phase we achieved energetic savings while maintaining high safety conditions. Bordolano supplies 20 million cubic metres of gas every day. This production level typically requires about 20 wells. We did it with 9.

We did it with 9

From modelling and planning to drilling we identify and adopt the optimal solutions

Facts & numbers

  • 9


  • 870 km

    Underground cables

  • 2 km

    Internal flowlines

  • 235 bar

    Injection and withdrawal capacity

  • 95,500 m2

    Operative surfaces


The reservoir ID card

  • Storage type: Depleted reservoir
  • Discovery age: 1951
  • Reservoir lithology: Sand and Gravel
  • Depth: 1,700 SSD (Sub Sea Level depth)
  • Thickness: 50 m
  • Cap Rock lithology: Shale
  • Working gas a P=Pi:1,200 MSmc
  • Original pressure: 240 Kg/cm2a (235,2 bara) (1,700 sslm DATUM)
  • Withdrawal Peak Flow: 20 MSmc/g
  • Injection Peak Flow: 20 MSmc/g


Combining optimal planning with best in class technologies

Bordolano operates with 9 wells: 7 are of new construction and have been studied with tubular geometries to obtain the best performances in the injection and supply phase, also taking into account the information obtained from previous studies and reservoir models. In addition, we also drilled 1 new well dedicated to deep micro-seismic monitoring.

Total asset wells n° 10 in 2 surface well pads:

  • n° 7 new storage wells, with Large Bore Completion 7 inch Tubing and sand control (max Gas-well deliverability 2,5÷3,0 MSmc/g)
  • n° 2 existing storage wells, with Standard Completion 5 inch Tubing and sand control (max Gas-well deliverability 1,0 MSmc/g)
  • n° 1 reservoir and microseismic monitoring well


The next generation storage

The Establishment of Bordolano is composed of:

2 Cluster Areas:

  • Cluster A: with 4 wells
  • Cluster B: with 5 wells
  • 9 Flowlines: Connecting pipes from Cluster to gas storage plant.

Gas Storage Plant (An integrated Gas Treatment System and Compression Station):

  • Withdrawal capacity flow: 20 MSmc/day using 2 Low Temperature Separator by 10 MSmc/day)
  • Injection Flow: 20 MSmc/d
  • Gas Turbines’s Mechanical Drive for injection:
  • 1 Unit General Electric PGT 25 DLE - 25 MW
  • 2 Units Solar Titan 130 - 15 MW
  • Working gas 1.200 MSmc
  • Maximum pressure 235 bar


Planning to achieve plant safety and reliability in supply

  • Main building classified REI 120 (fire and smoke resistance) and MEDIA REI 30.
  • ESD and PSD management with an integrated control and safety system. The plant is divided in 11 zones that are individually vented in case of emergency.
  • Network of phonometers that detect gas leaks up to ½ inch.
  • Infrared and catalytic detector for gas leaks.
  • Linear heat detectors monitor all the equipment.
  • Monitoring system for the thickness of underground pipes in the plant with 64 buried clamp on guided wave sensors.
  • High-Integrity Pressure Protection System (HIPPS), a type of Safety Instrumented System (SIS) designed to prevent over-pressurization of a plant. The HIPPS shuts off the source of high pressure before the threshold design pressure of the system can be exceeded, thus preventing the rupture of a line or vessel. HIPPS is considered as a barrier between a high-pressure and a low-pressure section of an installation.

What we care about

We strive for safe working conditions for people and ensure that our production is respectful of the environment.

Integrating HSE requirements is a critical part of EPC arrangements.

We go one step further turning these constraints in opportunities to face the challenges of the future.

Testo Alternativo


Months of construction



Over 1.7 million

Working hours


Hydraulic tests


Companies involved

0 accidents


Bordolano is a best practice in combining efficiency, safety and environmental sustainability. We plan carefully to adopt procedures and advanced technologies that meet stringent environmental compatibility and safety assessments, in order to both maximize efficiency and minimize emissions. We are committed to the reduction of energy consumption and the protection of nature and biodiversity.

Supplying with
environmental respect

Thanks to Dry Low Emission technologies and Low Temperature Separator models we reduce NOx and CO emission in the atmosphere. Innovative systems with minimal acoustic and visual impact have been adopted for the drilling of the new wells to protect the water basin from any type of infiltration. Clean fuel such as methane is used for the gas turbines that drive the compressors primarily in the summer months. A continuous emission monitoring system (Carbon Monoxide - CO and NOx-Nitric Oxides) operates in order to guarantee its compliance with limits provided by the regulations.

Don’t hide,

A process of mitigation and environmental restoration helped to make the plant integrate with its surroundings. Acoustic masking significantly reduces the noise produced by its operations. Bordolano's site occupies an area of 17 hectares, 8 of which are green areas: the plant is surrounded by 970 forest trees, 40,000 evergreen shrubs, 1 km of cycle paths and 4 small lakes with aquatic plants.

Storage solutions from subsoil to the market


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