By using tNavigator advance technologies, we had better opportunities to explorer more complex and challenging tasks related to static and dynamic modeling workflows that we were hesitated to apply them in the past due to software’s and hardware’s limitation. Currently we are considering RFD as the key strategic partner who is providing us with great technology and technical support to fulfil our goals and visions in very efficient and practical ways.

Faisal Al-Jenaibi,
Principal Reservoir Engineer (Simulation),
Abu Dhabi National Oil Company

We have been using tNavigator for the last 2 years. It has reduced our simulation run times allowing us to have more detailed models (more cells) and to conduct an important sensitivity analysis that improves our decision-making process in uncertain scenarios.

The Argentina and Colombia RFD team arranged several training sessions that enabled us to make full use of the software’s capabilities. The product has been excellent, and with its professionalism and friendliness, the support team has made a huge difference.

Cristian F Groba,
Senior Reservoir Engineer, GeoPark

I am an experienced geomodeller, having previously used many of the well-known software packages available. tNavigator geomodelling (Geology Designer) is new technology whose functionality is improving all the time. Geology Designer is now in a place where I can build all the technically challenging geomodels that I need. The software support from RFD is very good, and the time taken for RFD to implement new functionality in Geology Designer is short. I would be very happy to recommend Geology Designer in tNavigator to anyone looking for an alternative geomodelling software package.

Robert Trythall,
Senior Geologist, Serica Energy (UK)

Our team has been using tNavigator for the last 2 years, for a wide range of reservoir simulation projects in oil and gas, CO2 Storage, and geothermal projects. The technical support and the training delivered by RFD always meet highest standards of quality and our experience with the software was fully compliant with our expectations and needs. We are very satisfied with the provided services and solutions.

Federico Games,
Head of Reservoir Engineering, GPCI (Geneva Petroleum Consultants International), Switzerland

This year, we decided to change our simulation platform and build new static and dynamic models for our FDP course delivery. RFD tNavigator software platform and the amazing technical support team made this journey seamless. We were privileged to have access to the cloud-based licensing which was deployed for every student and academic usage. RFD team also worked very closely with us not only in building and configuring the models but also in providing excellent training sessions for the Master’s students. The graphical user interface is powerful, the software is robust, efficient and compatible with multiple simulator platforms. It executes numerical computation tasks with speed. Thank you for all your support. It is very much appreciated.

Lateef Akanji,
Senior lecturer and MSc Petroleum Engineering Programme Coordinator, University of Aberdeen

As a new user of tNavigator, I was very impressed by the solution provided by Rock Flow Dynamics. The abundance of self-help manual/tutorials, the optimal use of modern hardware, the relatively simple User Interface are all notably improvements on other industry software available. I have just finished building a history matched model on our Kraken field within a tight 3 month window and the speed of tNavigator running on our Cluster helped a great deal. Furthermore, I was able to rapidly create a range of forecasts, and to derive P10/P5/P90 cases, using tNavigator’s Assisted History Match functionality.

Reservoir Engineering Discipline Lead, EnQuest

AGR have been testing tNavigator on a recent full field modelling study. Our client and their partners requested the workflow for the reservoir model to be created in an alternative software package, but were willing to test tNavigator as much as possible during the modelling work. Due to the flexibility of tNavigator we were able to integrate the tNavigator ‘Simulation’ module into our workflow in a very efficient way and managed to cut down on simulation time during the course of the project. This saved us many weeks of ‘waiting on simulation results’-time and allowed us to conclude the project successfully.

Throughout the project RFD have been extremely supportive and able to help us through the few obstacles we encountered. I have been especially impressed with the turnaround regarding a little bug in the ‘Batch Jobs’ module, which was fixed and released within a matter of days.

Linda van der Bol,
Senior Reservoir Engineer, AGR Reservoir Management (Oslo, Norway)

I have been using tNavigator as my go to simulator for both my history matching and forecasting exercises on our complex 3-phase dual-porosity carbonate field. Thanks to the robustness of the methodology tNav implements for numerical convergence, tNav allows the user to take advantage of having large degrees of freedom for optimizing their simulation run time without jeopardizing the stability of their models. I highly recommend tNavigator for any Reservoir Engineer actively involved in day to day simulation.

Yaseen Grimen,
Senior Reservoir Engineer, DNO (Norway)

I have been working with tNav and the RFD team for four years.

When I first started using tNav on a trial basis, I ended up using it exclusively as I realised it produced the same results as our existing software but much faster, allowing me to meet an important deadline which I would have struggled to otherwise meet.

The interface was basic but had the essential features a reservoir engineer needs. It is now much more sophisticated, feeling like a fully integrated package, having been continuously developed over the past four years.

The help desk are technically excellent and very helpful. From day one I had hands on help in the office despite only being on a trial license at the time. Covid-19 has almost improved this experience as it has become more acceptable to schedule a helpdesk video conference, often at a moment’s notice.

Dealing with RFD feels honest and direct. They are there to help us perform better in every way. Pricing is transparent and you don’t feel you have to review PO’s under a microscope for any catches.

Neil Costeloe,
Chief Reservoir Engineer, Independent Oil and Gas Plc (United Kingdom)

As operator of the Draugen field, OKEA was eager to test an alternative simulation tool on our existing reservoir models.

The generosity of RFD with respect to offering a trial license and technical support in customizing our existing simulation model was much appreciated. As it turned out, very few modifications of the input deck were necessary.

Results from our tests were impressive, both in terms of user friendliness of the GUI, accuracy of the calculations and CPU performance. Consequently, we’re now a regular customer of RFD and have integrated tNav into our workflows.

Thomas Lerdahl,
VP Reservoir and Production Technology, OKEA AS (Norway)

The response time and the level of expertise are just phenomenal. I also find the tailored short video clips and numerous available tutorials, for virtually every problem I have encountered, very helpful.

Dr Artem Kotenev,
Chief Development Specialist, LUKOIL Overseas North Shelf AS (Norway)

tNavigator is a powerful simulator which supports third party data input formats. The user interface is friendly which makes it efficient and easy to use. It is the best value for money on the market today.

Laurent Ghilardini,
Reservoir Engineer, Vermilion Energy

Many thanks for the quick turnaround and exemplar technical support! It is working again and the WLO is running as I type! Your fast service means a lot to us, as it is the enabler for us to deliver to our stakeholders!

Bruno Roussennac,
Senior Reservoir Engineer, Shell

It was my company’s first time to use cloud computing services for the reservoir simulation. RFD cloud configuration made the experience seamless. There were some simulation problems arising – mostly due to the fact that my experience with tNavigator is fairly new and we are running large and complex DPDP models – RFD would always be available with excellent helpdesk support. In fact this level of professional support stands out among simulation software vendors.

Lukasz Wrobel,
Reservoir Engineer, TAQA Global

The RFD team is always responsive and provides an excellent service. The compatibility of tNavigator with other industry standards is highly advantageous and the software itself performs very well with improved run times that help make smart work of sensitivity analysis.

Rebecca Maguire,
Senior Reservoir Engineer, Summit Exploration and Production Limited

I have had a chance to test the tNavigator program for several years. tNavigator has grown from a simple fast dynamic simulator to a full package; covering seismic, static & dynamic modelling, PVT, well and network modelling. We decided to purchase a license and haven’t regretted it. tNavigator has good documentation, fantastic support, flexible options for modelling and is fast, thus we can spend more time analyzing results.

Anuar Ishniyazov,
Senior Reservoir Engineer, Focus Petroleum Services

I have been using tNavigator for several projects and it has made my work much more efficient.  From my experience tNav is not only fast but really easy to use and I have found the technical support second to none.  Quite simply I think tNavigator is best in class.  A real game changer.

Sheena Stevenson,
Senior Reservoir Engineer, EnQuest, Aberdeen, United Kingdom

Excellent! Thanks! Years have passed, and still, coming back to tNavigator I realize what simulator is the best of the best! There have been so much useful stuff added to it since 2012-2013!

Reservoir Engineer,
Major Exploration and Production Company

tNavigator has been a necessity in enabling our team to plan and successfully drill 6 horizontal wells in the past 6 months. It’s versatility and speed has allowed a fast but detailed progression of well placement and planning for effective reservoir development which would not have been possible on our previous software within the same timeframe. On top of this the technical and commercial staff at RFD have been more than helpful from day one – thank you.

Andrew Moore,
Senior Reservoir Engineer, Cabot Energy Plc

We have been very impressed by the quality of the help desk support from the RFD office in Aberdeen. The staff are knowledgeable, helpful and friendly, and while the software is intuitive, I have no doubt that their assistance has saved us time. The software ‘does what it says on the tin’ and does it very well. On top that, RFD are very receptive to suggestions for new and improved features.

Iain M Campbell,
Reservoir Manager, I3 Energy

The tNavigator tool has allowed us to streamline our subsurface workflows – we have been able to rapidly identify optimal drilling locations, run sensitivities and sense-check results through an intuitive and user-friendly GUI interface. The RFD team have been very helpful whenever problems arise, and respond quickly to any technical feedback. We hope it keeps getting better!

Calum Hunter,
Petroleum Engineering Manager, Ping Petroleum, United Kingdom

I used tNavigator for several projects and was really impressed with the accuracy of results and the speed of calculations. My last project was a complex oil field to history match, with several producers as well as gas and water injectors. The run time using a third-party simulator was 36 hrs with single core and 1 hour with 20 cores (parallel). With tNavigator, the run time was reduced to ½ hour! (using GPU). Results were rigorously identical.

Nolwenn Perzo,
Staff Reservoir Engineer, OPC, London, United Kingdom


RFD provides a powerful tool ‘t-Navigator’ that every reservoir engineer should have. Using t-Navigator, we have managed to complete geological to dynamic modelling study within few weeks. t-Navigator has a user-friendly interface that helps engineers to build a simple geological sector model which can be fit for purpose for engineering use. And RFD’s support team is great help when we get stuck.

Heikki Jutila,
Technical Director, Phoenix RDS Ltd, Aberdeen, United Kingdom

I want to thank you for the good qualified support and assistance in using the tNavigator software package and leave you positive feedback on this product. Currently, while work execution, I use tNavigator to create sector models and calculate on their basis a variety of options for uploading ASP to the Salym oilfield. Very friendly interface and high speed of the calculations of this product allow me to perform quite complex calculations with the maximum speed, and also to let to visualize a graphic material in high quality.

Svetlana Volgina,
Lead Reservoir Engineer, Salym Petroleum

tNavigator has been a great help for our research and teaching. This year, I had six honours students who used tNav for their theses! I have also used tNav for my latest journal publication and using it for the OLYMPUS Optimization challenge. Thanks for all the support. It is really appreciated.

Mohammad Sayyafzadeh,
Petroleum Engineering Lecturer at University of Adelaide

Thank you rfd for creating the tNavigator on Amazon cloud service. This is a revolutionary product that is accessible, scaleable and affordable. I have run simulations via an internet connection while traveling around the world on the AWS clusters. Multiple simulation cases can be run simultaneously, and I can scale up processing power by utilising additional computing nodes. This means my customers get insights faster saving valuable time. The most important benefit is to my bottom line, as I pay only for computing resources used. Whether it is a quick small model or a larger complex reservoir process, tNavigator on Amazon cloud has done it for me and my customers.

Martin Soh,
Petroleum Engineer, Reservoir Minds

Dear Vasilii,

I’m writing this letter to thank you and RFD Houston team.

We used tNavigator to build a gas reservoir model for one of our consulting projects and were pleasantly surprised with how easy and quick we could do this. We used a new product of RFD – tNavigator Model Designer. In my opinion it is good and efficient product. The interface is very intuitive, the product is very responsive and executes tasks on the fly. After only about half day of working with the help of RFD software support engineer (who was excellent!), we were able to build a grid that takes into account geometry of faults and bed surface, find the right static and dynamic properties of the model and match the model with respect to estimated resources. Also we were able to make the first production simulation run.

It is worth noting that we had essentially no prior experience with tNavigator. As a user of various geological and simulation packages with roughly 20 years of experience I can say that tNavigator Model Designer has a unique combination of tools combined with an exceptional ease of use that puts this subsurface software well ahead of the competing static simulation packages.

As our industry is getting into the new age or competition we have to learn to do more with less. your product helps us to do exacly that. Do more reservoir simulation work with less financial and human resources required.

I wish you and the company you are leading all the best.

Thank you!

Iskander Diyashev,
President of Goragovo Energy Engineering Corporation former, Chief Engineer of Sibneft exploration and production company, former member of Board of Directors of Society of Petroleum Engineers (SPE)

Occasionally someone comes along with a truly new approach. And is usually met with disbelief, because the status quo is always more comfortable. With over 35 years experience in reservoir simulation, I would like to say, that tNavigator have created this Eureka moment and have taken simulation into the 21st century. Superfast processing comes with synchronised GUI for maps, line graphs and well diplays; it allows for immediate timestep by timestep analysis of the history match in progress. Stop/Retrace/Start technology allows for ad hoc intervention during a run, alleviating the need to wait to the last timestep; effectively conducting multiple runs in one. Interogation of the results is so improved, that one now considers whole new data, which were previously left untouched. Truly a game changer!

Bruce Stevens,
Reservoir Engineering Consultant, EnQuest


Having been a user of reservoir simulation for over 30 years, I was looking for the next step change in technology that allowed us to do the things we wanted to do, at the resolution we wanted, in an acceptable timeframe and at reasonable cost. RFD achieved this, and I’m sure will achieve a significant part of the reservoir simulation marketplace as others realise that this is a step change in the performance/price value driver.

Steve Flew,
Technical Director, Petrofac Malaysia

AGR have been very impressed with tNavigator. By utilising all of the computing power available in today’s multi-core workstations with a single license we have seen significant reductions in simulation time in a variety of models. This will aid in generating a more comprehensive range of development scenarios for a range of projects. A lot of hurdles that other simulator packages have “because that’s the way it’s always been” have been overcome with tNavigator, such as the ability to pause & step-in and make changes at any timestep. This, coupled with a straightforward GUI and compatibility with multiple simulator decks, makes it a very versatile and efficient tool for ourselves and our clients. With excellent user support from the team here in the UK and development centre in Russia, RFD have shown a willingness to take on board ideas and suggestions to optimise workflows together.

Peter Roberts,
Reservoir Engineer, AGR TRACS International Ltd

I have been using tNavigator on one of the largest field development projects on the Norwegian Continental Shelf since the mid-eighties. The purpose of the simulation study was to investigate future-phase development scenarios and to perform a sensitivity analysis on facilities locations and processing constraints, including production and injection network modeling.

tNavigator turned out to be a major leap forward in terms of computation time, without compromising simulation quality and accuracy. The usage of tNavigator allowed me to run large numbers of simulations simultaneously, be able to QC results the same day, to fine-tune and start new simulations before going home. In this way I was able to almost quadruple the amount of scenarios to investigate.

Paul Tijink,
Lead Reservoir Engineer

I’ve used the tNavigator for a while now for our polymer study, but also other simulations since it’s so fast and it fits nicely into our Petrel workflow. It’s so intuitive that none of us had to attend any training course.

Geir–Magnus Sæternes,
Reservoir Engineer, Lundin Petroleum Norway. 
(The original article

With tNavigator we managed to reduce the simulation time of the Samotlor field model from one day to 39 minutes. It completely changes the approach to development planning and waterflood optimization of this huge brown field.

RFD reduced the complexity of routine operations with the models to the general PC user level

Vladislav Dzyuba,
Director of Reservoir Modeling, TNK-BP

We’ve been mainly using the tNav simulator for heterogeneous petroleum reservoirs of low, to very low, permeability; in primary and secondary recovery.

Our experience so far has been very positive, both, for its main functions and many of its complementary features.

It’s high speed processing has allowed us to simulate models with a great quantity of cells, increasing the model resolution. This way we were able, for example, represent in detail the stratigraphic characteristics that control the dynamic behavior in the reservoirs we are working on.

The simulator Assisted History Matching procedures allowed us to get, in short times, “adjusted reservoir characteristics”.

The use of the Split & Merge Module was very useful, enabling us to achieve the required flexibility in our workflow.

The explicit simulation of the well hydraulic fractures has granted us the possibility to achieve a better History Matching and, as a result, more accurate forecasts in complex low permeability and high heterogeneity reservoirs.

Being a finite difference simulator, tNav has good numerical convergence but also has the ability to express the results in 3D Streamlines. This has enabled us to optimize Secondary Recovery Volumetric Efficiencies. To the above it is added the so-called “Management Waterflooding” that optimizes the flow of water injection in the Secondary Recovery Processes.

Finally we have found in tNAV an excellent tool for the simulation of complex fields, saving time and money in the reservoir management of the field development and exploitation.

Mirta Córdoba de Galacho,
Technical Director, MG&A Oil&Gas


tNavigator is applied to a model of complex multizone gas condensate reservoir. It exhibits parallel acceleration of over 100 times on our 256-core cluster compared to single core runs. This allows our reservoir engineers to try many different production forecast scenarios each day.

Alexey Yazkov,
Deputy Director, NOVATEK Research and Development Center

I would like to express my appreciation for RFD’s outstanding support and thank your development team for adding surfactant modeling capabilities to tNavigator. Use of this feature in our simulation work has advanced our understanding of surfactant flooding potential in the Spraberry oil field in West Texas.

Oil and gas exploration and production company

tNavigator became a software of choice for reservoir studies carried by TGT Oil & Gas Services company and Sofoil company in 15 countries, including Russia, USA, South-East Asia and Middle East. The multicore-optimised design of tNavigator solver opens the gates to full-field simulations on original geological fine-grid and allows bypassing detrimental upscaling procedures. The simulation time is reduced from weeks to hours.

The time and space resolution of sector modelling has substantially increased and now avails very accurate side-track modelling and production forecast which form the basement for drilling justification.

The enhanced computation speed allows simulating short-term pressure responses with tiny time steps and micro-fine grid, which opens new horizons in cross-well pressure pulse testing and account the actual geology of the area, actually well locations and trajectories, actual production history and interference between wells.

tNavigator is the first software on the market to provide user-friendly calibration facility for the holes where along-hole flux profile has been measured, which allows integration of time-lapse production logging data into a reservoir model and corresponding changes over time.

Arthur Aslanyan,
CTO, TGT Oil and Gas Services


tNavigator makes the reservoir models in our company practical for engineers in the field. They are able to perform a thorough analysis of the reservoir dynamics and make their everyday decisions without years of experience with reservoir modeling software.

Yuri Krasnevsky,
VP of Geology, Bashneft


…This study shows that high-resolution fine-scale reservoir simulation can be used to improve modeling and understanding of interactions between the matrix and fracture systems of the Spraberry. The use of a reservoir simulator optimized for processing on multi-thread, multi-core CPUs makes possible reservoir studies using high resolution models that were once impractical due to lengthy run-times.

Conclusions, SPE-168723-MS

Rock Flow Dynamics collaborates with lots of Universities all over the world, giving grants by providing tNavigator licenses for students, Master’s Degree Student, PhD students for field development planning, integrated models of reservoir-surface network building and also for thesis projects.
One of the Heriot-Watt University Master’s Degree Students, Diego Corbo, expressed gratitude to Rock Flow Dynamics for provided tNavigator licenses for his thesis project.
“I just finished my thesis project at Heriot-Watt University, and with that my first relevant experience with reservoir simulation.
I wanted to specifically thank you for your support (and patience!) through the whole process: you really made a difference and I’m sure it wouldn’t have been possible to complete the project without your help. Hope I didn’t bothered you too much and I look forward to work with tNavigator and the team again in the future!” – said Diego.

Diego Corbo,
Master’s Degree Student in Heriott Watt