Instructions for using the LoFS Calculator

The Facilium LoFS WEB Calculator for first pre-appraise estimate is based on 14 years of experience from establishment, installation and operations management of LoFS systems for a number of clients, world wide and in various types of environments.


Welcome to the Facilium Web Calculator. You will find that it is quite easy to use.

  • If you have registered or are already have been registered by invitation from Facilium, then please proceed to the Calculator
  • If you are not registered, please do so first if you wish to have access to the calculator by going to the Registration Page

Note that it is important to read the below text to understand the value of the information in the calculator and how your data is protected.


Please be advised that NO calculator data will be saved! If you leave the page the data will be reset to the default values. No one but the user will have access to the information. You will be able to print each record and results on your own printer.

This is a Facilium proprietary product and we reserve the right for use of the calculator to those we approve use for. It is not a common domain.

General assumptions

While LoFS systems are excellent reservoir management tools, it is important to be aware of that the process for establishment (preparation and installation) is quite specific relative to other field installed seabed part of the systems. This is partly true for the platform based parts.

Most of the project processes and / or equipment up to the end of 2014, had a number of new aspects attached, which has given the execution and management a fairly steep learning curve. Multiple projects have brought out many of the common traits of those learning curves which can be used to either avoid risk and / or right out reduce cost for both systems and services.

The main assumption is that establishment of LoFS systems at the cost levels calculated herein are performed with such specific LoFS establishment and operational skills.

Note that deviations from the below specifications can result in substantial change of LoFS cost compared to here calculated

Specific assumptions and limitations

 1 Preparation phases Traditional oil company preparations through Pre-Appraise / LoFS geophysical suitability, Appraise / Feasibility, Select, Define leading up to Sanction / FID
 1.1 Technology The probabilistic budget includes all different developed technologies that are in essence or actually ready for deployment, e.g. electrical and fiber optical systems
 1.2 Technical preparation Includes conditional studies for installation, show stoppers, basic engineering and specifications
 1.3 Supply Chain Management Include long and short listing of suppliers and contractors, tendering process and selection of recommended supplier
 1.4 Management Full company management and partner preparation processes through traditional gate reviews ending with sanction decision
 1.5 Organization Include an efficient LoFS experienced organization that understand the cost / effort implications for the project, from decisions made in the preparation phase to operating system.Include an experienced seismic operating organization who will use considerable effort to find professional and cost effective survey method and a 4D / 4C data processing / interpretation team
 1.6 Cost The preparation costs may vary from one company to another, and from project to project depending on the set of tasks for each project. The probability spread in this cost calculator contain all Facilium experienced scenarios.
 1.7 Value creation There is no attempt in this calculator to assess the value creation from LoFS relative to other seismic methods. The main benefits of LoFS lie in the ability to quickly (within weeks or days of completed survey) produce very high quality 4D imaging for improvement of drilling, production quality, production flow and to reduce the amount of drilling.This value is sometimes not included in a comparative seismic method study or selection, and is mostly regarded as company internal information established in pre-appraise studies.
 1.8 Currency USD 2015 average value.
 1.9 Installation year Minimum 2 years from start Appraise.
 2 Installation Execute Includes all activities to detail engineer, procure, manufacture, install and test a LoFS system
 2.1 General factors There are a number of factors in our regular calculations (100’s of variables) which determine the detailed cost. The numbers presented in our web calculator are synthesized (reduced) to the nine most cost affecting variables, providing a level of accuracy of in the order of 99% compared to the main calculator.
 2.1.1 Geographical location Variable: Select between 12 separate oil producing parts of the world in order to account for the cost impact of vessel relocation and transportation time and other local factors
 2.1.2 Units Variable: Metric and US Customary Units to allow for familiar measures input
 2.1.3 Life span Fixed to 20 years. The cost is usually not greatly driven by this, except for maintenance cost.
 2.1.4 Maintenance The maintenance cost is calculated based on proper protection of the system from physical damage.
 2.2 System supply Includes detail engineering, procurement, manufacture, testing, transportation and installation support services for topside, riser / conduit and seabed equipment, as well as remote operation communication equipment.
 2.2.1 System configuration Variables: LoFS seabed system area, Seismic line (X-line) spacing and inline separation of sensor modules, as these three factors have a major impact on the system cost.The cost calculations include topside system components, a riser with conduit, umbilical, hubs / backbone cable, lead-in and seismic array cable, including all standard appurtenance.
 2.2.2 Services The calculations contain typical system supplier services to the topside and seabed installation effort.
 2.2.3 System types Include all system types, all existing technologies, within the low and high numbers, as if the calculation is made before a system or main supplier has been selected.
 2.3 Platform / Topside installation Includes all detail engineering, procurement, manufacture and transportation of system preparatory equipment, as well as installation activities and testing
 2.3.1 Existing riser tube No investment in riser J-tube, I-tube or similar has been included. However, there are different methods available for
 2.3.2 Equipment spacing Use of existing indoor non-classified space for electronic and electrical equipment.
 2.3.3 Electronic equipment Includes all electronic equipment required for recording, data storage, system control, power control and remote (IOR)/ local operations.
 2.3.4 Fiber optical and electrical equipment Includes all inside topside electrical power / laser equipment, cabling, junction boxes and other outdoor equipment, whether in Classified areas or not, whether in turrets or non-relative rotating platform areas.
 2.3.5 Hang-off Include riser hang-off arrangement.
 2.3.6 Pull-in arrangement Includes installation, operation and demobilization of pull-in winch
 2.3.7 Data recording operation Remote operated (IOR) from land. No operators on the platform
 2.4 Subsea installation Includes detail engineering, procurement, transportation to and from home port to mob port, mobilization / demobilization, field qualification, pre-installation activities, installation and post installation activities
 2.4.1 Seabed hardness Variable: Three hardness criteria are given, hard (>80kPa), sandy / silty with clay bands (~10 to <80 kPa), soft (<10 kPa)NOTE!, greater than 400 m water depth the hardness criteria must be selected to SOFT! (as the cables are laid on the seabed)
 2.4.2 Installation time Based on system installation in many different environmental conditions, equipment types and contractual terms
 2.4.3 Effective vessel work days 22 hours/day, and 2 hours for vessel equipment maintenance
 2.4.4 Riser type Static Riser in water depth less than 180 m, Dynamic from greater water depths.
 2.4.5 Route / Product surveys Pre-installation survey and survey while installing
 2.4.6 Seabed equipment installation method If more than 400 m water depth equipment will be of bottom frame type and installed in regular offshore lifting and placement modeIf less than 400 m water depth over-trawlable arrangements are included, either bottom frames or seabed pile protected.
 2.4.7 Seabed cable installation method If greater than 400 m cable laid on the seabed and if soft seabed possibly with depressing of sensor modulesIf less than 400 m water depth trenching is used. Powerful regular water jetting trenchers for sand and soft seabed, cutting wheel trencher for hard seabed
 3 Operations  Note that the surveys calculated in our calculator are based entirely on strategic, module based survey spreads. Use of regular survey vessels will INCREASE the cost!
 3.1 Preparations This includes technical preparations for specification of source, launching system, compressor and other facilities, as well as operating criteria / equipment for efficient timing, navigation.Based on simple spread using modular or small dedicated system and small survey vessel, plus chase vessel in some geographical areas.Maintenance plan, environmental and other legal conformities. Risk assessments and proper HSSE process.Proper mobilization / demobilization time depending on geographical location (transit time).
 3.2 Seismic Survey time With easy deployment and retrieval system. Ability to sail at a speed and compressor capacity to fire a shot every 9 seconds minimum. Efficient performance with 5% re-shooting.
 3.3 LoFS life span 20 years
 3.4 Number of surveys The number of surveys is determined by the user of the calculator
 3.5 Data processing and Geophysical model Mainly internal Company personnel with preprocessing outsourced
 3.6 Reservoir Management use Specific internal reporting for reservoir management, drilling and operations is not included
  • If you are registered or already have been registered by Facilium, then please proceed to the Calculator (or alternatively to the Log-in Page)
  • If you are not registered, please do so first if you wish to have access to the calculator by going to the Registration Page

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