Welcome CONTENT. Volume 40 Number 11 November 2009

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1 Volume 40 Number 11 November 2009 CONTENT Page 1 G e o p h y s i c s i n Reservoir Engineering 2 T h e S t o r y B e h i n d First Gas in A12 3 SPE Student Section News 4 C l o s e - t h e - L o o p Between Geophysics and Reservoir Engineering 5 Biography: Xuri Huang 8 D O N G E & P is Heading Newly Established Oil Business Organisation in Greenland 9 SPE YP News 10 Case Stories From The Subsurface Work Performed On The Oselvar Development 11 Biography: Christian Høier Welcome Geophysics in Reservoir Engineering Many thanks go to Schlumberger for sponsoring last month s meeting at Charlottehaven, and to providing a most interesting speaker for the evening. Jon Elphik reminded us all of the analytical approaches that can be used to identify some key features in waterflood performance. His case histories provided useful examples. After two seasons with the newsletter generously sponsored by Maersk Oil, we now need to make some adjustments to a more constrained budget. To maintain the quality of the newsletter we will issue it every two months, and will preview the next two meetings in detail as was done before on a monthly basis. This month we pursue a topic linked to water management in oilfield with our first SPE Distinguished Lecturer of the season. Xuri Huang will speak on closing the loop between geophysics and reservoir engineering. The time lapse (or 4D) seismic survey has become established in the industry in the last decade as an additional source of information on inter-well oil displacement. Sufficient benefits have been assessed to warrant installation of permanent ocean bottom cables over some fields (Valhall Field in Norway is one example) to take the costs of each repeat survey to the point that regular data collection is done. Of course, having acquired the 4D data, the interpretation and integration with reservoir engineering of the field is a significant task. We look forward to Xuri illustrating the techniques for, and benefits of, doing so. We have no meeting planned in the festive month, but in January we will be back to hear a case history from Christian Høier of DONG Energy on the reservoir engineering of the Oselvar field in Norway. Oselvar will be 3 horizontal-well, subsea development in Palaeocene formations tied back to BP s Ula platform, 23 km away. We look forward to 2 interesting meetings. Please join us at Håndværkerforeningen on November 19th. Your early sign up via our website is much appreciated! Dave Walsh, Section Chairman future meetings for more information r e g a r d i n g t h e p r o g r a m m e see page 6 Repeat

2 SPE Copenhagen section The Board season Section Chairman: Dave Walsh Shell Nærum Hovedgade 6, 2850 Nærum Tel.: Programme Chairman: Felicity Boyd Schlumberger Oilfield Services Tel.: Newsletter Chairman: Miriam Lykke DONG Energy Agern Allé 24-26, 2970 Hørsholm Tel.: Membership Chairman: Carsten Møller Nielsen GEUS Øster Voldgade 10, 1350 Copenhagen K Tel.: [email protected] Treasurer: Hans Plessing Welltec Gydevang 25, 3450 Allerød Tel.: [email protected] Web Master: Erik S. Jakobsen HESS Corp. Østergade 26B, 1100 Copenhagen K Tel.: [email protected] a12 Nearly two years after start up, the A12 gas field operated by Chevron continues to deliver strong production for the company and its coventurers. Situated in the A&B blocks of the Dutch sector of the North Sea, the A12 development project targeted shallow gas from a cluster of technically demanding discoveries dating to the early 1970s and previously viewed as uneconomic. The scope of the project included installation of a central processing platform, an export pipeline and drilling and completion of seven development wells. The story behind first gas in Developing the field was a huge challenge; at the time there was no gas production in the immediate area and the project presented some technical problems related to low reservoir pressure and unconsolidated sands. Ten well tests had been performed in the past with half not viable and the other half producing sand. The completion designs, therefore, were abso- Secretary: Gerwyn Williams Chevron Denmark Inc. Parken, Øster Allé 48, 2100 Copenhagen Ø Tel.: [email protected] Members: William Ginty, BPS Aps. Tel.: [email protected] Per Bak, Mærsk Olie og Gas AS Esplanaden 50, 1263 Copenhagen K Tel.: [email protected] Klaus Hasbo, Noreco [email protected] Alexander Shapiro, DTU IVC-SEP Tel.: [email protected] Morten G. Stage, DONG Energy Tel.: [email protected] Susanne Poulsen, Mærsk Olie og Gas AS Esplanaden 50, 1263 Copenhagen K Tel.: [email protected] 2

3 3 lutely vital to project success and extensive laboratory testing was put in place to develop the optimum solution. These showed that to control the unconsolidated sand formations, a screen needed to be employed that was in direct contact with the reservoir rock in order to prevent any movement of the formation grains. It was determined that the preferred solution was the expandable sand screen technique which has a slotted, expandable base pipe, overlapping filtration and an expandable outer protection sleeve all of which combine to provide greater flexibility and the best chance at achieving borehole compliance. This technology provides a borehole support, keeping the sand in place while also offering the contingency option of placing smaller screens inside and performing a gravel pack in the future if wells fail to contain the formation sand as expected. One of the key successes was team work with drilling and completion teams working together closely to ensure that wells were drilled within the required diameter limitation in order to give the screens the best chance of working successfully. First gas was achieved in late 2007, demonstrating that resources traditionally viewed as uneconomic could be successfully developed through a combination of technology, ingenuity and strong team work. SPE Student Section News A new Center for Energy Resources Engineering has been established at the Technical University of Denmark (DTU). The goals of the Center are to promote research and education in the area of energy resources, to increase the visibility of this development - both in Denmark and worldwide - and to coordinate the efforts of Faculty members at DTU who s expertise are of key importance to the engineering problems related to energy resources. The Center for Energy Resources Engineering has a dynamic structure and is widely interdisciplinary. It involves Faculty members and researchers at several Departments at the DTU (Chemical and Biochemical Engineering, Environmental Engineering, Informatics and others). This will create a new research and educational environment, promoting exchange of ideas and collaboration between the different areas and leading to technological breakthroughs. Petroleum engineering is a core application area for the Center for Energy Resources Engineering. Another important subject is Carbon Capture and Storage (including industrial, environmental, and enhanced oil recovery aspects). Applied thermodynamics, transport in porous media, petrophysics, geophysics, and numerical methods are among the main competencies of the Center for Energy Resources Engineering. The Center is created around the Center for Phase Equilibria and Separation Processes (IVC-SEP) at the Department for Chemical and Biochemical Engineering. Professor Erling H. Stenby is the Director of the Center for Energy Resources Engineering. More information can be found here:

4 Abstract ABSTRACT Close-the-Loop Between Geophysics and Reservoir Engineering Xuri Huang, SunRise PetroSolutions Tech, Inc. In the process of history matching and production data analysis, reservoir engineers normally tune the model to match the historical data. The model tuning mainly relies on their insights into the reservoir. The geological or geophysical data are barely revisited in this phase. This causes much unknown uncertainty for the prediction. Very frequently, the model after history matching by the reservoir engineers and the model from the geophysicists are not very consistent. The solution to this inconsistency is to build a mechanism in our production data analysis and history matching that enables both constraining the analysis of seismic information as well as model updating. So by this mechanism for keeping the consistency, we can additionally interpret seismic data with the assistance of the reservoir engineering information. A workflow in this process to revisit seismic attribute analysis, interpretation, and model updating has been designed and implemented. It found that many of our reservoir history matched models have certain inconsistencies with our geophysical data. The workflow first starts with a material balance-based data fusion between the seismic attribute and the production data. This gives a more dynamic understanding of the seismic information, especially for the seismic data acquired after production. Secondly, in the process of history matching, a rock model is used to generate synthetic seismic attributes from the reservoir model to compare with observed seismic attributes. This leads to an integration of petrophysics, seismic, and production analysis. By looping between model updating, matching of production history, and seismic attributes, the model becomes more objective. With different seismic data constraining including 3D, 4D, even prestack and multicomponent, the influence of seismic data types can be investigated. Another benefit is that this process allows further understanding of the seismic attributes. Finally, with the seismic and production data-constrained model, the optimization also can be guided using G&G data by defining the spatial patterns. The workflow should be a universal way to improve the consistency between reservoir engineers and geoscientists. 4

5 C o p e n h a g e n november M e e t i n g THURSDAY 19 NOVEMBER 2009 Programme 17:00-18:00 Drinks Biography Biography Xuri Huang Xuri obtained his PhD degree (1996) and MS degree (1994) in reservoir engineering from University of Tulsa. He graduated from the University of Petroleum (PU), China with a BS degree in applied geophysics in 1985, then worked in an integration research team of the University of Petroleum for seven7 years. Xuri worked for WesternGeco from 1996 to 2001 in the areas of 4D and reservoir characterization. Currently, he is the president of SunRise PetroSolutions Tech, Inc. in which he is focusing on tools to close the loop between reservoir engineering and geophysics. He served as a committee member for SPE/SEG/AAPG joint 4D workshop 2006, He has published almost 50 papers in SPE, SEG, conferences, and journals. Nørreport S-station 18:00-19:00 Presentation and SPE News 19:00-21:00 Dinner Håndværkerforeningen Dronningens Tværgade 2 A 1302 København K Xuri Huang SPE DL Close-the-loop between geophysics and reservoir engineering Entrance Fee None Registration Please indicate your attendance by Tuesday 17 November by signing up on the internet Håndværkerforeningen SPE Copenhagen Section

6 Meeting schedule September 22 Main After Dinner The Future of Reservoir Exploitation Paul Hazel, Welltec Welltec Welltec October 27 Main After Dinner Water Management: Some simple diagnostic methods Jon Elphick, Schlumberger Charlottehaven Schlumberger November 19 Main Dinner Close-the-loop Between Geophysics and Reservoir Engineering Xuri Huang SPE DL Håndværkerforeningen Chevron January 19 Main Dinner Reservoir Engineering for the Oselvar Field Wave and Tidal Energy Christan Høier, DONG Energy Jon Vindahl Kringelum, DONG Energy DONG Energy February 16 DONG Energy Main Well Engineering and the Sakhalin 2 project Tim Newman, Shell TBA Shell Dinner / Discussion March 18 Main Dinner Unlocking Ten Trillion Barrels of Global Oil Shale Resources Khosrow Biglarbigi SPE DL TBA HESS April 22 Main Dinner TBA TBA Maersk Maersk May 27 Main Annual Meeting Listening to the Reservoir - Interpreting Data from Permanent Downhole Gauges Roland Horne SPE DL GEUS GEUS June 19 Main Dinner Summer party 6 TBA Schlumberger

7 7 This is Noreco F A S E T T foto: Geir Egil Bergjord Noreco is a fast growing Norwegian, independent oil and gas company. The company s focus is to explore, develop and produce oil and gas in the North Sea. Since its start in 2005, the company has grown rapidly through license rounds and acquisitions. Noreco operates in Norway, Denmark and United Kingdom, and employs 70 oil and gas professionals. Noreco is listed on the Oslo Børs under ticker NOR. Norwegian Energy Company ASA Haakon VII s gt. 9, P.O. Box 550 Sentrum, 4005 Stavanger, Norway Kongevejen 100C, DK-2840 Holte, Denmark Exploration and Production International working culture based on Nordic values Substantial job flexibility Good work/life balance Minimal hierarchy Efficient decision processes High responsibility Emphasis on competency development Making the most of global resources Baker Hughes Denmark Amaliegade 16 C, st. DK-1256 Copenhagen K Denmark Reservoir Solutions You Can Trust No matter what your challenges deepwater, unconventional oil and gas, HPHT, production optimization you can trust Baker Hughes to help you maximize reservoir performance. With a track record of over 100 years, a customer base that includes virtually all the world s top oil and gas companies, and facilities around the world, Baker Hughes brings a full complement of reservoir analysis, drilling and evaluation, and completion and production expertise to every project. Want to know how Baker Hughes solutions can help you meet your challenges? Contact your local Baker Hughes office or visit our web site Maersk Oil is a truly global operator, with activities in key provinces around the world. Wherever we operate, we look to build upon our proven track record in technical innovation, seeking solutions to new challenges and making the most of global resources. Explore more at Baker Hughes Incorporated. All Rights Reserved. BHIad.indd 2 8/13/2009 6:30:21 AM

8 DONG is heading newly established organisation in Greenland There is great interest in oil and gas exploration in Greenland and on the initiative of DONG E&P, a Greenlandic business organisation for oil and gas companies has been established. The organisation is called Greenland Oil Industry Association, abbreviated GOIA and it is headed by Arne Rosenkrands, Exploration Manager in E&P, DONG Energy. Development, safety and environment Arne Rosenkrands points out three main objectives of the organisation: Development of the Greenlandic oil industry, dialogue between the industry and the authorities and development of expertise in even safer and more eco-friendly activities. By establishing the business organisation we will help strengthen and develop the Greenlandic oil business through cooperation and dialogue with the parties involved. GOIA will also be the right forum for dialogue between the business and the authorities. In that context, the organisation has already demonstrated its eligibility. In connection with the new Greenlandic Minerals Act, GOIA was asked to review the draft bill. The organisation must also propagate the knowledge of safer and more eco-friendly oil and gas activities. Presentation round in Greenland Together with the deputy chairman, who will be elected soon, Arne Rosenkrands travels to Greenland at the beginning of November. The purpose of the visit is to present the new business organisation to the Greenlandic authorities and to the Greenlandic press. DONG E&P in Greenland DONG E&P has been active within oil exploration in Greenland since the mid-1990s. From 1999 and six years on, E&P was part owner of Nunaoil, the national oil company in Greenland. At present, DONG E&P is operator of an exploration licence. The licence partners are: Exxon, Chevron and Nunaoil. Greenland Oil Industry Association, GOIA At present, eight companies hold licences in Greenland. One company is leaving and the remaining seven companies are all members of the new business organisation. Members: DONG Energy E&P (Chairman) Exxon Chevron Nunaoil Husky Cairn PA Ressources 8

9 E&P oil business 9 Photo: Carsten Borch SPE YP News The next month will see the Young Professionals continue with their programme of activities after last month s kick-off event. For the next event a contingent of Norwegian young professionals will be sharing their experiences of working in Norway and give an insight into the technical as well as social challenges that are unique to working in the Norwegian North Sea. This will be a great way to share North Sea experiences and hear about some novel ideas. Another major undertaking for the young professionals is the udannelseskaravane or education caravan in which a number of young professionals will travel to 10 technical secondary schools in Denmark to represent the oil and gas industry. The main aim of the campaign is to present to school children, who are about to make a choice of degree and university, the vast potential of a career in the oil and gas industry. The young professionals will also be charged with puncturing the many myths that are associated with the oil and gas industry. As well as showing the need for the next generation of engineers to tackle and overcome the technical challenges of exploiting the more challenging hydrocarbon reservoirs. As always all volunteers and suggestions for events and activities are encouraged and should be directed to [email protected]

10 Abstract ABSTRACT Case stories from the subsurface work performed on the Oselvar development The Oselvar field was discovered in 1991 to the South of the Norwegian North Sea. The field is to be developed as a subsea tie back to the Ula Hub. get a better understanding of the field development options. As part of this work, key uncertainty parameters identified as case stories were addressed by sensitivity analysis. Considered a marginal development, significant work was done by the subsurface team to reduce uncertainties in order to The presentation focuses on three of these case stories and how the different challenges were solved. Case 1 NTG and Kv/Kv relation in a deep-water turbidite reservoir. Addresses how geology and reservoir engineering disciplines worked together to establish a connection between NTG and the vertical permeability. Case 2 PVT behaviour and relative permeability. Addresses the critical oil in Oselvar and it s influence on the relative permeability modelling Case 3 Field development study The different development scenarios considered for the Oselvar field to optimise production. 10

11 C o p e n h a g e n JANUARY M e e t i n g TUESDAY 19 JANUARY 2010 Programme 17:00-18:00 Drinks 18:00-19:00 Presentation and SPE News 19:00-21:00 Dinner with speaker Biography Biography Christian Høier Christian is currently on an Expat contract in Stavanger office working as a Senior Reservoir Engineer in the Oselvar development project. He joined DONG Energy in 2002 where he has worked as a reservoir engineer and Core Analysis Specialist. From Christian worked at GEUS Core laboratory doing research projects and Core Analysis for the oil industry. In 1995 he is graduated from the technical University of Denmark with a master in reservoir engineering. DONG Energy Agern Allé Hørsholm Christian Høier Senior reservoir engineer, DONG Energy Case stories from the subsurface work performed on the Oselvar development Dinner speaker Jon Vindahl Kringelum Engineer, DONG Energy Wave and tidal energy Entrance Fee None Registration Please indicate your attendance by Thursday 14 January by signing up on the internet Dong Energy SPE Copenhagen Section

12 Open Hole Successes New 412 Well Tractor Welltec has developed a larger version of the field proven Well Tractor with a running OD of 4 1/2 that has been successfully deployed on several open hole logging operations. This novel system has several applications, including tandem with another 412 Well Tractor or a 318 Well Tractor, each run separately or run together for increased performance. Multiple wells have been run in various configurations with an average toolstring weight of 1,100 lbs. Welltec enabled the operator to return to previously drilled wells and log them, which provided them with better knowledge of their geology. Features Running OD of 4 1/2 Operational open hole diameter from Successfully applied on several OH logging jobs Time and cost effective Runs up to 5,500 ft/hour For more information, ask your local Welltec representative. Visit welltec.com for contact details.