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September2010
SINTEF Petroleum ResearchSeismic & basin modelling activities
Combining Geophysics and Basin Modelling Data to Reduce Exploration Risks
Full Waveform Inversion (Imaging problems, sub-salt & sub-basalt in Barents Sea)In complex geological settings, like sub-salt areas, conventional seismic imaging methods usually fail to reconstruct well defined images. To improve velocity model building in such complex regions, we use frequency-domain full-waveform inversion.
This method allows to reconstruct the full wavenumber range contained in the data and thus to drastically improve the resolution of the derived models. It also provides a quantitative estimation of the physical properties in this area.
Status: 2D visco-acoustic inversion code is available. Applications to synthetic dataset in collaboration with StatoilHydro in progress. Application to sub-salt synthetic example in progress.
Contact: Cé[email protected]
IntCSEMControlled-source electromagnetic (CSEM) methods are an important new tool for identifying hydrocarbon accumulation. Integrating CSEM and seismic data can provide added value for both methods. We attempt to integrate both data types in a joint CSEM and seismic full waveform inversion.
(1) CSEM forward modeling
(2) CSEM full-waveform inversion
(3) Joint CSEM/seismic full-waveform inversion
improved input(lithology, porosity)
Rock physics modeling/inversion
Lithology, hydrocarbon
volumes, phases, uncertainties
Basin modeling: hydrocarbon
volumes, phases,uncertainties
Cross-calibration
Best prediction
Structural constraints
“Soft” rock physics constraints
integration with rock physics and basin modeling
poss
ible
feed
back
Status: Project open for funding. Contact: [email protected]
Top Seal Leakage Strategic Institute Program “Top seal integrity and leakage, with relevance for exploration risk in the Barents Sea” will take place from 2008- 2010. The work flow is shown below:
Cap rock properties:Porosity, permeability, entry pressure, mech. strength as function of•Facies•Compaction and diagenesis•Databases / literature
Leakage and remigration:•Hydraulic leakage
•Pressure and stress interactions•Erosion and uplift effects
•Trap simulator•Seismic detection of fractures / leakage
Applying leakage / seal models – case
study:•Constraining burial and temperature history•Modeling pressure and stress history•Modeling leakage processes•Integration seismic / EM / Bas Mod•Calibration to well observations
Status: Three years project, 10.8 MNOK by the Norwegian Research Council.
Contact: [email protected]
GEOcompaction (Global improved porosity compaction relationship for basin scale fluid flow modelling)The objective is to establish an improved porosity compaction relationship for better hydrocarbon migration modelling and pore pressure prediction.
The deliverables will be an improved porosity compaction model, tested and evaluated on large well log data sets from several sedimentary basins, and implemented in basin modelling tools both for hydrocarbon migration and pore pressure prediction. The model may also be applied for seismic velocity inversion.
North Sea
600
1000
1400
1800
2200
2600
3000
0 20 40 60 80 100
Porosity/Clay content
Dep
th [m
]
North Sea 2
0 20 40 60 80 100
Porosity/Clay content
GOM
0 20 40 60 80 100
Porosity/Clay content
West Africa
0 20 40 60 80 100
Porosity/Clay content
Porosity
Clay
Estimated
North Sea
600
1000
1400
1800
2200
2600
3000
0 20 40 60 80 100
Porosity/Clay content
Dep
th [m
]
North Sea 2
0 20 40 60 80 100
Porosity/Clay content
GOM
0 20 40 60 80 100
Porosity/Clay content
West Africa
0 20 40 60 80 100
Porosity/Clay content
Porosity
Clay
Estimated
Status: Project open for funding.Contact: [email protected]
www.sintef.com
Within SINTEF Petroleum Research, the Seismic and Reservoir Technologies Department and the Basin Modelling Department offer a wide range of integrated solutions for exploration.
By combining geophysics data and basin modelling data in an integrated workflow the risks of exploration are reduced.
Our aim is to developp new methods and workflows to address the current challenges of the oil industry.
Email: [email protected]/petroleum
BergenSINTEF Petroleumsforskning ASPostal address: Thormøhlens Gate 53 C,NO-5006 Bergen, NorwayPhone: +47 73 59 11 00Fax: +47 55 31 42 55
StavangerSINTEF Petroleumsforskning ASPostal address: POB 8034,NO-4068 Stavanger, NorwayPhone: +47 51 87 44 00Fax: +47 51 87 44 01
HoustonSINTEF Petroleumsforskning ASPostal address: MARINTEK (USA), Inc.,2603 Augusta #200, Houston, Texas 77057, USATel: +1 713 452 2771Fax: +1 713 452 2768
Trondheim (Main Office)SINTEF Petroleumsforskning ASPostal address: POB 4763 Sluppen,NO-7465 Trondheim, NorwayPhone: +47 73 59 11 00Fax: +47 73 59 11 02
SEMIThe integrated basin modelling tool SEMI is a map based software package for the quantitative assessment of hydrocarbon accumulations and prospect evaluation.
• Fast ray tracing scheme based petroleum migration within full 3D stacked carrier sequences (> 2 Mio cells per carrier)
• Bulk and multi-component hydrocarbon migration involving up to 10 individual hydrocarbon components
• Maturation and expulsion modelling, based on an extensive kinetic database
• Sensitivity analyses and key risk factor assessment (Monte Carlo)
Status: SEMI is available for licensing, development continues in ongoing industry-funded projects. We perform case studies for the oil industry.
Contact: [email protected]
PRESSIMThe pressure modelling software Pressim simulates and quantifies the buildup and dissipation of pressure in fault-bounded compartments through time. It is based on the concept that fluid pressure is generated by mechanical and chemical sediment compaction and dissipated by lateral and vertical fluid flow, both processes being controlled by cross-fault transmissibilities.
Status: PRESSIM is a part of SEMI or stand alone. Development continues in ongoing industry-funded projects. We perform case studies for the oil industry.
Contact: [email protected] or [email protected]
TIGEROur finite-difference time-domain modeling code TIGER provide synthetic 3D data sets in order to:
• Optimize survey layouts
• Aid interpretation
• Test new processing techniques
The program supports media ranging from constant-density (visco-) acoustic to TTI anisotropic. A dual parallelization allows modeling of large 3D surveys within days on industrial-size clusters. TIGER includes various source types, highly effective absorbing boundaries and optimized finite-difference operators for most accurate modeling.
Status: Working version available for licensing, development continues in ongoing, industry-funded projects.
Contact: [email protected]
OptAVOOptimal AVO is an in-house developed 2D code that allows an improved Amplitude Versus Offset analysis up to large offsets.
• Use larger offsets (close to critical angle) and get more reliable information out of the amplitudes in your data
• No limitations due to large angles, anisotropy, strong contrasts
• Improved crossplots with better discrimination between different lithologies
• Tool to obtain correct interpretations of the amplitude information in your data, in each different situation for any case, using the a priori information
Status: OptAVO tool is developed and are ready for industry prosjects.
OF-Mod 3DThe source rock modelling tool that gives:
• Improved input for HC migration modelling
• Predictive studies in exploration frontier areas
• Alternative source-rock models
Results
• Source-rock thickness
• Total organic carbon content (TOC)
• Source-rock quality (Hydrogen Index HI)
- Source-rock heterogeneity - Controlling parameters - Quick parameter testing (uncertainty) - Improved understanding
3D-grid blocks (.grdecl) Maps (ZMap+, Irap ASCII classic, xyz-format)
PRESSEIS - Improved pore pressure prediction from seismicThe objective is to develop improved methods for predicting pore pressure from seismic data. Analysis of seismic data will be combined with basin modelling techniques in order to obtain an accurate and robust prediction of pore pressures prior to drilling.
As part of the project, velocity-depth trends models for sedimentary rocks will be developed and calibrated.
Status: Funding from the industry and the Norwegian Research Council, 12 MNOK. Started 2006, and will run till 2009.
Contact: [email protected]
OBS work flowAccess to Oscean Bottom Seismic (OBS) data helps imaging in difficult areas, such as complex media or in the presence of gas clouds, and provides better a prediction of lithology and fluid.
• Vector fidelity: component calibration
• Multiple attenuation: wave equation approach using interpolation and regularisation, a fast Radon Transform, up and down separation and deconvolution
• Velocity model construction: stereotomography using semi-automatic picking, inversion using PP and PS co-depthing
Status: SIP project (2004-2008) 15 MNOK funded by Norwegian Research Council. Follow-up NFR/industry project could involve 4C/4D, 4C lithology and fluid prediction, 4C with EM or 4C with FWI.
Contact: [email protected]
Status: Available for licensing, case studies for clients, training courses, development continues in ongoing projects.
Contact: [email protected]
Calculate uncertainty using Monte Carlo technique
Contact: [email protected]
SINTEF Petroleum Research
Seismic & Basin modelling activities
