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Greenpact Rigs

Solutions Analysis – Test emission reduction systems on a specific rig

With our Solution Analysis tool you can test any rig against one of our generic wells or your own custom made well, and apply emission reduction systems like energy software, hybrid systems, closed bus, drilling efficiency equipment, alternative fuels and exhaust gas cleaning to name a few.

In addition, you can add fuel cost and emission taxes and the tool will give you a brief economic summary, including system cost.

Emissions Analytics and Contract Analytics - 2 versatile tools to compare history and display future emissions.

Our Emissions Analytics and Contract Analytics tool displays a user defined selection from a single rig to the world fleet, from history to future projected emissions.

In addition, the Emissions Forecasting tool will help you compare present years’ emissions to next years’.

Emission Profiles

With emission profiles you can benchmark rigs against the same baseline

Plan Your Emissions

Drilling programme emissions give you the opportunity to select emission favourable rigs and plan your future drilling campaigns on a sustainable basis

Customize Wells

Custom well profiles let you build your own well according to your own specifications and test emissions based on this

Emission Reduction Systems

With the Solution Analysis tool, you can explore emission reduction initiatives and pay-back times

Greenpact Rigs can help our clients map out their emisssions to indicate if emission targets will be met.

Frequently asked questions

Can’t find an answer? Ask us at hello@esgian.com

Disclaimer, Terms and Conditions

The emissions estimates provided on this Platform reflect Esgian’s assessment at the time that they are made available as part of the Service. No guarantee can be given that such emissions estimates will be the same as reported figures. The emissions data is for its intended recipients only and shall not be published or circulated to a third party without our prior written permission. Whilst Esgian AS has endeavoured to provide accurate and reliable emissions estimates, no liability with respect to its completeness or accuracy is accepted. Any reliance on the emissions estimates is done on your sole risk.

Upon accessing the Service you accept our Terms and Conditions which we encourage you to read carefully. These can be changed at any time, and the latest version can be found here.

Who needs Greenpact Rigs?

Whether you work for a bank, financial institution, investment fund, insurance company, consultancy, oil and gas operator, or drilling rig owner, rig emissions are a critical aspect of the offshore rig market. Emissions will be part of the foundation for any decision, whether it is portfolio, investments, access to capital, contracting, supply/service planning, reporting, strategy and more.

How does this work?

The system is divided into three modules:

  1. Drilling/Well program
    For drilling, a well program is used which has sections with specified parameters related to the well which is used to calculate time and power consumption. Each section is then divided into activities and the time and power is then calculated for each activity and section using the well parameters and expected work from each equipment use. From this the total power consumption from the well can be calculated.
  2. Auxiliary/Marine Systems
    Auxiliary equipment such as for cooling, HVAC, hotel loads, lighting etc.  is defined for each rig design and added to the drilling loads for the calculated duration of the well.
  3. Station Keeping – Dynamic Positioning (DP)
    For DP loads, each DP rig design are given coefficients for wind, current and waves which are then used with weather data to calculate the force required for station keeping including forces on the riser. The force required is then converted to thruster power using ABS formula for bollard pull. The calculated time and power for the three modules are then used to calculate the total power consumption which is then converted to fuel consumption and CO2e (equivalents).

How do you calculate the duration of a well?

We use the well program parameters for each section to calculate the duration of each section. Each section is divided into activities (drilling, tripping, cementing etc.) and we use the parameters from the well program such as ROP (rate of penetration), tripping speed, section length to calculate the time for each activity based on rig specific parameters.

The model outputs the time for each section and activity within the sections which then is summarized for the total well. WOW (waiting on weather), NPT (non-productive time) and a time efficiency factor are then added to the total well time to give a more accurate representation of the total time.

What type of well?

For the purpose of this model, 3 different types of wells have been pre-defined for each relevant geographical area. The 3 different types defined are development, exploration and P&A which can then be used to benchmark different rigs against each other.

In addition, the Greenpact Rigs model is fully transparent allowing for customized wells with specific parameters as decided by the client. This will allow for a more accurate representation for a specific well when benchmarking different rigs.

How do you calculate power consumption from the well program?

There is a specific amount of energy required to perform the work to drill a well such as lifting a certain amount of drill pipe/casing, pumping a certain volume of mud with certain pressure, rotating the drill string with a certain torque and so on. This information is used to calculate the power required for the drilling related equipment for each activity within each section using standard power calculation formulas for motors and pumps.

The power required for each equipment is then averaged for each section and the average power usage for each equipment is then used for the power consumption for each activity.

How do you know the auxiliary power consumption?

Based on data gathered from rig designs we can estimate the amount of power each rig design requires in auxiliary systems. The power usage for auxiliaries have been calibrated based on actual power consumption data from the field and are being constantly evaluated to be as accurate as possible. Auxiliary loads include marine systems (cooling and compressors loads), HVAC, LQ as well as winterization if applicable.

What about loads from dynamic positioning?

When designing a rig for dynamic positioning, it’s important to know the maximum expected load on the thrusters to be able to size the thrusters according to defined maximum weather criteria. The force on the thrusters is depending on the hull geometry for wave and current loads and the topside structures for the wind load.

For each semi-submersible and drillship design, force coefficients for the wave, current and wind loads are defined based on previous design experience (including model tests and CFD (computational fluid dynamics) analysis). These coefficients are then used with six representative data points from weather data for different locations to calculate the thruster force for each data point. The forces are then summarized in accordance with the frequency of occurrence for each weather to give a representative average thruster force.

The thruster force is then converted to thrust using the ABS (American Bureau of Shipping) bollard pull formula including efficiency and thruster interference factors based on design experience.

What are the differences for different rig design regarding fuel consumption?

Since the drilling loads are based on the well itself, the total work required to drill a well is the same for all the rigs. However, since different rigs have different auxiliary loads, different types of drilling equipment and drill wells with different efficiency the fuel consumption per day is different. As an example, if one rig takes 40 days to drill a well and another rig takes 45 days to drill the same well the amount of power usage for drilling is the same but the rig that takes longer will have a lower power consumption per day.

What drives energy efficiency and how is it calculated?

There are different types of equipment/systems that could be installed on a rig to make it more energy efficient. These are equipment like energy saving systems (ESS) for peak shaving of the load curve on the rig, super capacitor packs to take the load from the draw-works when tripping, heat recovery from exhaust etc. The different energy saving systems are implemented in the model by defining an energy saving percentage for each module (Drilling, Aux and DP) as different systems will impact the rig differently (as an example, super capacitors could only impact drilling equipment and as such no energy would be saved on the rest of the rig).

By using this method to define the energy saving percentages the energy efficiency module is highly customizable which will allow the user to make the energy saving calculations as accurate as possible.

How can I get user support or more information about subscriptions?

For technical support, questions regarding usage of the site, or to report issues with the site, contact us.

Regarding subscriptions and pricing, note that these are normally valid for a one-year period, but we may offer discounts for multi-year subscriptions.  For more information, please contact us so we can find the right solution for you.

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E: hello@esgian.com