clearplay

Clearplay is a trade mark of eleCtromagnetiC geoserviCes asaClearplay BroChure r01 06/08

Clearplay integrated em systemfind/test/evaluate

integrated em system emgs.Com

the idea that gave Birth to an industry The concept was trialled using a towed, high-power source

of EM energy and a series of receivers placed at known locations on the seabed. By logging the refracted energy collected from subsurface layers, they were able to identify areas of high electrical resistivity – a direct indicator of hydrocarbons.

Their technique, ‘seabed logging’, proved remarkably successful. A new company, Electromagnetic Geoservices – EMGS – was formed to provide the first commercial seabed logging service. And they became the founding fathers of a new industry.

EMGS has remained market leader, training the world’s leading experts in EM and ceaselessly refining the technology and systems used to acquire, process, visualise and interpret EM data.

Clearplay — em Comes of ageToday, EMGS reinforces its pre-eminence in EM with the launch

of Clearplay, the world’s first fully integrated EM system. Clearplay melds all the EM expertise and experience of EMGS

with the technology, tools and processes it has developed. It provides seamless, end-to-end EM services in support of hydrocarbon exploration and has extended application in both development and production phases in life of field.

Clearplay is the product of more than a decade of hard won experience. It provides evidence of hydrocarbons more quickly and with more confidence. It will maximise the chance of successful exploration outcomes, reduce risk and increase return on investment.

EM has come of age.

/01 integrated em system

in 1997, svein ellingsrud and terje eidesmo ConCeived the possiBility of adapting eleCtromagnetiC (em) teChnology to deteCt hydroCarBon reservoirs under the sea.

/1997The idea is born

/2002EMGS established

First purpose- built equipment

First commercial survey

/2003First survey vessel commissioned

‘Best Exploration Solution’ at World Oil Awards

/2006First commercial 3D operations

First survey for government organisation

‘Best Exploration System’ at Harts E&P Awards

/2007EMGS listed on Oslo Stock Exchange

Fifth survey vessel commissioned

Founders awarded Virgil Kauffman Gold Medal

/2008Launch of Clearplay Integrated EM System

A high power electromagnetic (EM) source is towed by a survey vessel. Sensitive seafloor receivers detect EM energy that has been guided by electrically resistive bodies in the subsurface, including hydrocarbon reservoirs. This data is processed to create resistivity maps and 3D volumes. High resistivity is an indicator of hydrocarbon presence.

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01/02/03/04Preparation for deployment of receiver and source.

Attention to detail is crucial. The receivers need to remain fully functional on the seabed for many days, even weeks.

Beneath the receiver, the soluble anchor is clearly visible, as is one of the four ‘A frame’ receiver arms, which hold the electrical sensors in the correct positions on the seafloor.

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With hydroCarBon reserves noW Being depleted faster than they Can Be replaCed and finding Costs inCreasing exponentially, an improvement in exploration effiCienCy and produCtivity is essential. emgs has Been responding to that need.

integrated em — right teChnology, right timeEMGS’ patented EM imaging technology has the ability to reveal information about the subsurface that directly relates to hydrocarbon presence – information that no traditional survey techniques can offer.

In working with this technology around the globe – over 350 surveys for more than 40 leading operators – EMGS has acquired unmatched knowledge and experience. And that has underpinned the continuing development of both the technology itself and its supporting infrastructure.

Clearplay Integrated EM is the natural outcome of that restless search for efficiency improvements.

Clearplay integrates the required components of EMGS technology with the people, tools and processes needed to support each stage in the workflow – from feasibility studies through survey planning, data acquisition, data processing and imaging to interpretation.

Clearplay supplies the features and tools required to integrate EM data with other forms of geophysical and geological information, essential to ensuring decision makers have the most complete picture available.

Clearplay integrates experience with knowledge of process. EMGS applies its experience of the strengths and limitations of EM technology in a comprehensive range of situations to ensure it’s used only when we are confident it will produce useful data.

Clearplay is fully supported by developments in infrastructure. EMGS now has the largest and best equipped EM fleet in the world. The most sophisticated EM source and receivers. And the most powerful computer cluster in the industry – Aurora. With more than 3,600 processors, Aurora is able to run 70 trillion calculations every second.

For our customers, the benefits of Clearplay are significant: much improved exploration efficiency and performance; significant reductions in risk and finding costs. And the ability to keep one step ahead of the competition.

52 surveys completed since 2002, where well evaluation data also exists, have provided an indisputable validation of EMGS’ technology. Survey predictions and well evaluation results show an 85% agreement – confirming the full extent of the efficiency improvements possible.

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1 SEB Enskilda Research, Top 25 IOC’s.

2 Discovery wells as a percentage of exploration wells drilled. Directorate General of Hydrocarbons, India.

exploration performanCe

india disCovery trend — 2001 to 2007 2

three Clearplay serviCe offerings have Been designed to support operators during the exploration phase: Clearplay find, Clearplay test and Clearplay evaluate.

Clearplay serviCe offeringsEach carefully-tailored service provides the combination

of EM technology, products, tools and expertise needed to achieve best fit with task – yet is flexible enough to permit condition-specific adjustment.

Feasibility studies provide the bedrock for customer confidence in the service outcome. They deliver early stage information to enable a go/no-go decision, advanced modelling to determine survey parameters and full virtual surveys to inform survey design.


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01EMGS’ high power source (tow fish), showing the umbilical connection to the towing vessel and part of the antenna.

02One of the receivers being lowered into the sea from the side of the survey vessel.

03Preparing a receiver before deployment.

04High power source being deployed.

053D attribute cube showing normalised electric magnitude (NMVO) integrated with seismic information.

Clearplay find Clearplay testClearplay evaluate

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Clearplay find — rapid, high quality lead generationAptly referred to as ‘scanning’, this service provides rapid generation of leads and, ultimately, prospects over large areas. It can also validate existing leads and prospects. Typically, it will involve acquiring data by towing a high power EM source over a coarse grid of receivers, 2-4 km apart, and the subsequent, rapid processing of that data onboard the survey vessel. It will be employed in early-stage exploration, pre or post licensing, but can also be used to re-explore mature areas.

Traditional exploration methods seek evidence for the geological conditions necessary to support the existence of hydrocarbons. The electrical resistivity data acquired by EM scanning can provide direct evidence of hydrocarbons. Though not all resistive bodies are hydrocarbons, all commercial hydrocarbon deposits are resistors. So, locating the resistors within a scanned area provides the leads needed to focus exploration effort.

Clearplay Find offers the display of EM data as 2D anomaly maps and 3D cubes. It facilitates easy integration with existing seismic and geological information. And it can provide evidence of stratigraphic traps not easily identifiable on seismic maps.

the Benefits of Clearplay findEM data resulting from Clearplay Find is rapidly obtained and provides good, early indications of hydrocarbons and prospectivity. This informs pre-licensing decision-making and permits rapid generation of prospect portfolios. This early delivery of quality leads gives our customers a tremendous competitive advantage. Overall exploration efficiency is improved, risk is reduced and the ground is prepared for achieving both performance improvements and cost reductions during the next phases of exploration.

Combining the EM data with seismic and other geological and geophysical information allows assessment of new blocks to be achieved faster and more accurately than with traditional techniques alone.

If already exploring a new block, Clearplay Find data enables more detailed EM and seismic surveys to be targeted at the areas identified as more likely to have accumulations of hydrocarbons.

Clearplay find

06This 2D anomaly map shows a widely-spaced receiver grid. The four red areas indicate the zones of high resistivity in the subsurface and will be treated as EM leads. The three orange polygons indicate leads identified by seismic surveys.

In two cases, seismic leads are confirmed by EM and will provide a focus for further exploration. The strong EM lead (top left), with no seismic confirmation, will also be explored further.

073D attribute cube showing normalised electric magnitude (NMVO).

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Clearplay find — summary Benefits/ rapid lead and prospect identification/ rapid and cost-effective assessment of prospectivity/ validation of existing leads and prospects/ accelerated prospect delivery/ better informed licensing and farm-in/farm-out decisions/ more effective use of other exploration resources/ re-explore licences for missed opportunities/ take a ‘last look’ before relinquishing a licence or

abandoning an asset/ reduced environmental impact of exploration activities/ reduced finding cost and finding time per barrel/ improved geological understanding of the block/08

01/02/03Onboard ship, and on the source and receivers is a combination of sophisticated navigation equipment and software from Concept Systems, Sonardyne and Kongsberg.

This provides accuratepositioning data necessary to achieving survey success.

04/05Every EMGS ship carries a large population of receivers, more than sufficient for the large-area surveys required for Clearplay Find.

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Clearplay test — aCCelerated prospeCt delivery, improved disCovery rates This service provides rapid, more accurate ranking of prospects in offshore locations, significantly reducing the likelihood of drilling dry wells. Typically, a prospect will be targeted by towing the EM source over receivers placed in one, or more, lines or a grid, 1-2 kms apart.

There are two possible outcomes from Clearplay Test. These are equally useful to operators as both contribute to increasing the discovery rate. A favourable test result indicates a much improved chance of success when drilling. A less favourable result allows prospects to be downgraded or abandoned.

Clearplay Test offers several useful visualisations of the processed data. If the survey lines or grid have been extended beyond the edge of the identified prospect, the lateral extent of the prospect can be confirmed. Presenting resistivity data as vertical sections of the earth shows the burial depth of the prospect. Combining this data with other geophysical information can provide an improved estimation of the total hydrocarbons volume.

Without EM testing, using only traditional approaches, the average discovery rate is just 25%. Customers who routinely EM test prospects before drilling achieve far higher success rates.

the Benefits of Clearplay testOperators are able to achieve a better discovery rate, more rapidly, with the same or fewer resources than when using traditional methods alone. A reduced likelihood of drilling dry wells means reduced commercial risk. And with confidence in the EM data, portfolio value is increased.

06This example map shows the use of three survey lines, which extend beyond the expected limits of a prospect. Clearplay Test reveals more detailed resistivity information than possible with Clearplay Find and helps define the lateral extent of the prospect with more certainty.

07Common Mid Point (CMP)inversion integrated with seismic information.

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Clearplay test

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Clearplay test — summary Benefits/ increased discovery rate/ reduced dry wells/ reduced finding costs per barrel/ accelerated prospect delivery and time to discovery/ increased portfolio value/ reduced environmental impact of exploration activities/ improved geological understanding of the prospect/ accelerate the appraisal decision process

01/02/03/04Careful preparation of receivers before and after deployment is normal EMGS quality control procedure.

05Preparing to deploy the source ‘tailfish’.

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Clearplay evaluate — quantifying reserves, reduCing eConomiC riskClearplay Evaluate improves certainty and efficiency in appraisal and development phase decision-making. It markedly improves the assessment of a reservoir’s potential following successful discovery well drilling. Typically the data is acquired by towing the EM source over and between the lines of a dense grid of receivers, 0.5-1.5 km apart. The quantity and quality of the information this generates, including 3D azimuthal data, enables the most sophisticated data processing and visualisations to be used and increases the accuracy of the results.

When combined with 3D seismic, geological models and appraisal well data, the outcome of this service is an improved estimation of the volume and distribution of hydrocarbons present within the prospect. These factors enable operators to establish, with greater certainty, whether the prospect contains commercially viable reserves.

Clearplay Evaluate offers visualisation of the acquired data as 3D images revealing quantitative resistivity vs depth. This information is an indicator of the distribution and saturation levels of hydrocarbons within the prospect.

the Benefits of Clearplay evaluateClearplay Evaluate data, integrated with information available from other sources, such as 3D seismic, will significantly improve the speed and accuracy of prospect appraisal, giving a more informed assessment of hydrocarbon volumes and distribution within a prospect. It has the potential to reduce the number of appraisal wells drilled, producing significant cost savings.

As with all Clearplay services, the over-riding aim is improved efficiency, lower appraisal costs and reduced economic risk.

04This example map shows a high-density grid, typically with receivers spaced 0.5–1.5 km apart above the target prospect.

05/06 This enables Clearplay Evaluate to acquire rich data suitable for preparing advanced imaging products such as 3D attribute cubes and 3D inversions, which can be integrated easily with other geophysical information.


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Clearplay evaluate — summary Benefits/ more rapid and accurate assessment of hydrocarbon

volumes and distribution/ better informed appraisal and development decisions/ reduced finding and development costs per barrel/ reduced number of appraisal wells/ accelerated time to development and first oil/ reduced economic risk/ reduced environmental impact of exploration activities/ improved geological understanding of the prospect

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01/02/03Effective integration of shipboard and land-based data processing.

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Clearplay — key teChnologies, tools and proCessesClearplay is the sum of a great many parts. Over 200 scientists

and technicians, including the world’s leading experts in EM; the largest and best equipped survey fleet in the industry; a remarkable range of software for processing, analysing, modelling and visualising the data we collect – and Aurora, the most powerful EM processing centre in the world.

Procedures and processes may not seem so exciting. But they are woven through all that we do – unifying and integrating the people, hardware and software behind Clearplay. They reflect the experience we’ve gained during millions of man hours spent pursuing excellence in the technology we are proud to have invented and developed.

On the following pages, we present a small selection of the factors that make the Clearplay Integrated EM System so special:

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Clearplay — supporting development and produCtion Surveying to find missed opportunities or satellite fields

is valid at any point during the life of a field where it could extend return on investment from existing assets. This is especially relevant late in the life of a field or licence block. When the infrastructure is already in place, a last look may pick up viable opportunities too small for consideration at earlier stages.

As exploration moves into development, Clearplay surveys will extend knowledge of the area immediate surrounding an identified target or, with a tighter grid than originally used in Clearplay Evaluate, will add revealing additional data to improve field development decisions.

During the production phase, the distribution of hydrocarbons changes as the reservoir becomes depleted. Currently in R&D is an addition to the Clearplay offering which will monitor changes in distribution, to maintain a healthy reservoir and maximise recovery.

Clearplay exploration phase serviCes, most partiCularly Clearplay find and Clearplay evaluate, have extended appliCation in Both the development and produCtion phases of life of field.

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01EMGS’ R&D department is actively engaged in refining and developing the Clearplay service offerings.

02Field engineers and technicians ensure all shipboard equipment is maintained at peak operating efficiency.

03/04/05/06/07Clearplay successfully integrates people, technology, tools and processes, providing benefits for customers throughout the workflow.

feasiBility and survey designMaximising customer confidence in survey outcomes is an essential component of Clearplay. Feasibility studies inform each step of the decision-making process.

Initially, based on customer-derived parameters, fast 1D ‘plane layer’ modelling is used to provide rapid analysis. It’s aimed at answering the core question at this stage: is it possible, in this geologic setting, to detect economic reservoirs? This step will determine whether full survey modelling is go or no-go.

If the decision is made to proceed, state-of-the-art, commercial model-building software is used to develop realistic and detailed 3D resistivity models.

Finally, using algorithms developed in-house, we are able to run a series of ‘virtual surveys’. This process, Grid Modelling, completes the assessment of survey feasibility and allows us to determine the best acquisition parameters for the local conditions – frequency mix, receiver placement and source towing geometry.

The output is an optimised survey design, ensuring that, once at sea, we are able to deliver, efficiently and with confidence, accurate and validated information to our customers.

proCessing, modelling and inversionThe ability to process large amounts of data in small amounts of time is one of the pillars supporting Clearplay. And one of the prime uses of that processing power is found in our 3D modelling, which finds application throughout the services, products and processes that make up Clearplay.

Our in-house 3D modelling code is lean and fast with a low CPU overhead. It’s a powerful, finite-difference, time-domain engine designed to solve Maxwell’s equations more quickly than frequency domain methods.

Where 3D inversion is required, the efficiency of this code comes into its own. The process involved is creating a model from existing information, testing it against acquired data and amending it to produce a better fit. This process is much iterated and a huge number of calculations is required before the final, depth-located resistivity image is produced.

Here, the value of Aurora’s power and capacity is most visible. An assembly of more than 3,600 processors in an 1800 server Dell blade cluster, Aurora is able to handle 70 trillion calculations per second. This recent, tenfold increased in capacity was driven by the surge in demand for the services and products that make up Clearplay. It is more than sufficient to handle the simultaneous demands for processing large datasets, generating answer products, handling all EMGS’ R&D work and coping with all routine network traffic.

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end-to-end WorkfloW integrationIntegration is a word so often used in marketing it can be easily dismissed as empty of any practical meaning. But with Clearplay, it is something we have strived for – the natural outcome of a focus on perfecting our technology; the result of a decade of experience and innovation joining forces to produce all the ingredients needed for a fully joined-up EM system.

There are four parallel paths to integration. The first happens internally – ensuring all the ingredients EMGS has developed are integrated seamlessly with each other, to create a whole that is definitely greater than the sum of the parts.

The second happens externally, the result of using our decade of real-world experience to create the best fit between Clearplay and our customer’s workflow at each of its stages – from feasibility studies through survey planning, data acquisition, data processing and imaging to interpretation and data storage. The closeness of this fit enables customers either to use all the components of the Clearplay system, or selected elements they need to support their internal capabilities.

The third is achieving integration of EM with seismic and other data. All Clearplay data is output in an industry-standard format, for easy import by customer’s own systems. The Petrel plug-in, developed with technical partner Blueback Reservoir, facilitates seamless integration with other geophysical and geological information within the Petrel platform. And, in an advanced stage of development, is software to enable ‘joint inversion’ of multiple data types.

Finally, Clearplay integrates three complementary EM measurements and methods, frequency domain EM, time domain EM and MT (magnetotelluric).

In Clearplay, EMGS has achieved integration at all levels; creating a formidable resource for our customers and offering a very real competitive edge.

01Efficiently and accurately, Grid Modelling predicts the effect of different grid spacings, source frequencies and tow directions – informing and optimising survey design.

02Clearplay Find anomaly map revealing EM leads.

03Common Mid Point (CMP) inversion.

04A typical 3D resistivity model, used for feasibility, survey design and post-survey analysis & interpretation.

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data aCquisition teChnology Acquiring the highest quality EM data has been a prime focus for EMGS from the very first trials of seabed logging. Fundamental to Clearplay, it requires the tight integration of a number of resources: survey vessels with bespoke handling gear; experienced crew; a high power, fully controllable source; ultra-sensitive receivers, absolute knowledge of positioning (for both source and receivers) and accurate synchronisation of transmitted and received signals.

The continued investment of time and effort involved in developing and integrating this system along with our careful choice of technical partners (including Siemens, Kongsberg, Sonardyne, Concept Systems and Bennex), has paid rich dividends.

Our towed EM energy source is the most powerful in the industry, with a frequency spectrum designed to suit local conditions, created by our ‘Source Optimiser’. It’s able to illuminate hydrocarbon targets through more than 3 km of rock and capable of working in shallow and deep water, in the world’s toughest marine environments. Our receivers are low noise, with low power consumption (allowing several weeks’ seabed operation) and have a large memory capacity. They are suitable for both controlled source EM and magnetotelluric (MT) surveys – ultra sensitive, with sophisticated gain control to enable detection of a wide variety of deep and shallow targets.

Deployment of both receivers and source is from the EMGS survey fleet, the largest and best equipped in the industry. A spare source and a large population of receivers is carried, providing both redundancy and the ability to handle large, complex surveys from a single vessel. All equipment is checked both before and after deployment – and scrupulously maintained in state-of-the-art, onboard workshops.

Dedicated EMGS engineers onboard are responsible for monitoring the quality and completeness of the data collected. Onboard processing helps accelerate generation of the final answer product for our clients and helps provide our ‘Fast Track’, a means of ensuring any survey extensions or adjustments can be agreed whilst the vessel is still on station. In addition, this onboard capability guarantees no vessel ever leaves the survey area without a complete dataset.

01Effective QHSE procedures underpin a global reputation for safety in all our operating procedures.

02Proprietary soluble receiver anchors dissolve safely over time, minimising the environmental impact of our surveys.

03/04/05A potent combination of experience and expertise,youth and maturity ensuresClearplay services provide a real competitive edge forour customers.

06Shipboard engineers are responsible for maintaining the quality and completeness of survey data.

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experienCe and expertiseThe experience gained from developing our EM technology for seabed logging and completing over 350 commercial surveys is our bedrock. No competitor has enjoyed this privilege. Uniquely, we have had the opportunity to hone skills we developed in the industry we founded.

In building our workforce from three to more than 300, we have chosen carefully and trained well. Our existing expertise in all the disciplines relevant to our work, from geology and geophysics through electronics to software engineering, has provided the foundation for creating a rising generation of youthful, innovative, EM-focused scientists, technologists, engineers and programmers.

This combination of experience and expertise, youth and maturity is surely the most potent and exciting mix for any technology company. And it provides enormous benefits for our clients. They can be certain they are accessing a greater depth of problem-solving experience than with any other company and reassured by the knowledge that the next generation of innovators is already building on those very solid foundations.

qhseA policy for Quality, Health, Safety and Environment is simply a necessary responsibility for many companies. But, at EMGS, it is fundamental to all that we do; part of our ethos. Our reputation has been built on the quality of our products and services, the safety of our operation in office, workshop or at sea. And an over-arching concern for the environment.

Every individual at EMGS, whatever their responsibilities, is trained to understand the importance of QHSE and to take personal responsibility for it. Individual and team goals are set and monitored, we constantly strive for improvements and we are able to demonstrate to our clients and the authorities the extent to which the awareness and implementation of QHSE is woven into our culture.

Policies and targets for minimising wastage, reducing power use and recycling exist in all areas of the company. Our high power towed source is designed, and proven, to have no adverse impact on marine life. Even the anchors we use to keep our receivers in place are made from an eco-friendly compound – dissolving harmlessly in the months after the receivers are lifted.

The work of EMGS also assists our clients to reduce their own environmental footprints. Implicit in all we do is a concern to increase efficiency in hydrocarbons exploration, by providing a clearer, more complete picture of the subsurface. This allows human, financial and technical resources to be focused only where they are likely to be productive and not where they will be wasted.

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Previous PageAurora, the most powerful EM processing centre in the world.

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emgs — leading the Way in em “ It is the responsibility of the market leader to continuously

improve the technology used.”The first glimmer of an idea came in 1997. The concept was to

use deep electromagnetic (EM) imaging to detect resistivity variations in the subsurface that could point to hydrocarbon accumulations. Following patent submission, the process of testing the theory continued unabated for five years – from small-scale tank tests to the rigours of a full surveys in Angola and the Norwegian Sea.

By 2002, the team’s confidence in the new technique, ‘seabed logging’, was high, EMGS had been established to commercialise it and, in the process, a new industry had been created. When the first commercial discovery was achieved, in 2004, the market had the validation it needed.

Since then, EMGS has remained totally committed to developing the technology it pioneered. The workforce has grown from three to more than 300 and includes most of the best EM experts in the world. The survey fleet has grown from one to seven vessels, the most recent pair purpose-designed. The hardware is the most effective and robust in the industry. The software tools to process, visualise and analyse the EM data continue to push at the boundaries of what is possible. And the attention to integrating all these elements, within EMGS service offerings and with external data, is unmatched in the industry.

The technology and expertise of EMGS has remained without parallel and so, too, has our experience: well over 350 commercial surveys completed, more than 120 vessel months at sea and in excess of 43,000 kilometres towed – a distance greater than the circumference of the Earth. All achievements far beyond the performance of any potential competitor.

Underpinning all we have achieved to date, and will achieve in the future, is an enduring commitment to Quality, Health, Safety and Environment. It’s central to the EMGS ethos and essential to those who work with us.

“emgs Can legitimately Claim to have the Best people, the Best teChnology, and the Best analysis tools in the em market. Whilst none of these faCtors is, of itself, unassailaBle, my Belief is that the ComBination of all of them is unBeataBle.” terje eidesmo — 2008

01Svein Ellingsrud

02 Terje Eidesmo

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emgs headquartersStiklestadveien 1 N-7041 Trondheim, Norway Telephone +47 73 56 88 10

europe afriCa & middle east Folkvordveien 11 N-4318 Sandnes, Norway Telephone +47 73 56 88 10

north & south ameriCa 16000 Barkers Point Lane, Suite 145 Houston, TX 77079, USA Telephone +1 281 920 5601

asia paCifiCUnit E-15. 2–4, 15th Floor East Wing, Wisma Rohas Perkasa No. 8 Jalan Perak 50450 Kuala Lumpur, Malaysia Telephone +603 21 66 06 13

To discover more about Clearplay, email [email protected], visit our website emgs.com or call your nearest EMGS office.

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