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ERC Equipoise / Services / Seismic Processing and Modelling
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Seismic Processing
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Seismic Processing and Modelling

ERC Equipoise have considerable expertise in design, acquisition and processing supervision of seismic data and have particular interest in combining this expertise with our interpretative skills to create a product that is well focused to improve the interpreters work. We also bring together experts in reservoir characterization to integrate the geologists understanding to the response of the seismic data.

Data Processing and Supervision

At ERC Equipoise, a small team of experienced professionals is available to help clients design seismic acquisition and processing programmes. We are able to prepare specifications, issue and review tenders, and offer project management services. Our team have experience of acquisition and processing in many basins throughout the world. Recent projects have ranged from support for an oil company in the execution of an experimental OBC survey over a field, to the design and execution of a small 2D seismic programme onshore north Africa.

Seismic Reservoir Characterisation

ERC Equipoise understands that seismic interpretation without a solid understanding of how the geology responds to the seismic wave is dangerous. Many bright amplitude prospects have resulted in expensive dry holes because of a lack of attention to what the amplitudes really mean.

A standard procedure has been developed within the integrated geoscience team that invariably improves the quality of the interpretation namely:
 
Rock Physics

i) Synthetic Seismogram matching between well and seismic using Hampson and Russell. Often this is done pre-stack as well as post-stack with fluid replacement modelling. The results of which are routinely imported back into Kingdom in terms of more accurate time-depth curves and synthetic matches.

Example synthetic match showing how creating a thirty degree section from an intercept and gradient volume can help map hydrocarbons.
   
 
Rock Physics

ii) Seismic rock property analysis and forward modelling to determine the key parameters controlling the seismic response. This is a bespoke procedure that optimises the interpreter’s time by informing them which peak or trough to map on which of the many volumes (Rp,Rs,Ro,Nears, Mids, Fars,AI,PR,EI,EEI,LR,MR) and, more importantly, what that peak or trough represents.

Rock physics crossplot showing how acoustic impedance varies as a function of shale and pore volume and that impedances greater than 13,000 m/s*g/cc can only be low porosity clean dolomite cemented sand.
 

Rosetta

Rosetta™ is a deterministic way of translating the narrow bandwidth seismic data into what interpreters would envisage if they were to overlay geologic boundaries and isolated thin layers. The method resolves thin layers of half the input tuning thickness with correct amplitudes. This procedure tends to be very useful for thin bed reservoir mapping and establishing lateral pinchouts.
 
Rock Physics  

Example pre and post Rosetta™ showing the considerable amount of continuous detail that can be “lifted” out of the narrow band input.