Seismic
methods
Longterm research topics and
technology needs
In general there is a need for increased understanding of
the reservoir. This includes methods for reservoir-characterisation by use of
seismic (with emphasis on 4D, 4C and LFP (Lithology and Fluid Prediction)),
reservoir modelling, flow prediction and use of borehole data. Tools are needed
for immediate update of the reservoir model based on integrated use of dynamic
data. Integration of various data types and disciplines together with
visualization are also key elements.
In addition to technology it is of vital importance to
focus on enhancement of competence levels and implementation of existing
technology for increased reservoir understanding.
Technology
needs – Seismic (emphasis on 4C and 4D):
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Interpretation/Processing: |
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Tools
& Skill-set to allow “flexible” correlations between
various components/modes Access to pre-stack data Tools to understand the data (visualization) Velocity modeling and analysis High resolution velocity models Interaction/constraints from interpretation Multiple removal Modelling Tools Tensor migration Full anisotropic migration Optimal combination of P and Z components Coupling the 4D observations to the history matching and the reservoir simulation |
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Acquisition |
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Vector
fidelity Repeatability Tools & methodology & skill-set for 4C survey design (illumination) Acquisition systems for very deep water Robust streamer/OBS matching for 4D and legacy tie-in purposes Shear-wave source (?) Down-hole applications |
Long
Term Research Topics – Seismic (emphasis on 4C and 4D):
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Interpretation/Processing |
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Understanding
the low band-width of shear waves The added value of converted wave AVO Lithology and Fluid prediction Pressure and Saturation prediction – quantitative estimates of changes Rock Physics Modelling Relationships between reservoir parameters (saturation, pressure, temperature etc) and seismic parameters 3D interpretation vs mapping Quantification of 4D effects Direct-indirect use of 4D observations to constrain the history matching and the reservoir simulation Processing of converted waves (statics, pre-stack, depth, anisotropy) |
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Acquisition: |
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When
does OBS (PZ) becomes more cost effective than streamer Logistics (platforms, pipelines etc.) Value of permanent installations Use of fiber technology – fiber replacing hydrophones? Source enhancement – resolution and penetration |
General technology Needs:
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3D interpretation vs mapping |
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3D gridding and grid conversions |
Other Relevant Research Topics:
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Timelapse tensor gravimetry |
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Electromagnetic seabed logging |
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Passive acoustic emission (flow, compaction, fracturing) |
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Integrating seismic, production and geology |
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Optimal extraction and use of data |
