Roknowledge - Moray Firth UKCS is a proposal for a rock physics interpretation study and database to provide a visual look-up reference of rock physics relationships and the seismic behaviour of rocks.
Roknowledge will provide solutions and correlations for hydrocarbon and brine seismic signatures over the potential and established plays. The proposal will be to analyse rock and fluid properties from about 50 wells.
Drawn from single well interpretations of rock properties, multi-well correlations will be established from carefully analysed core, wireline velocity logs , petrophysical, in-situ pressure and reservoir data. Roknowledge is a joint venture combining high quality conditioned well information provided by IHS with the leading rock physics expertise of Ikon Science.
Developed to reduce exploration and drilling uncertainty this tool addresses the growing need for a convenient and interactive resource of quantitative interpretation solutions for the modern seismic interpreter, petrophysicist and reservoir geophysicist.
Each well will have a series of well log images and cross-plots to illustrate rock acoustic interpretations. A set of correlation panels and maps will also be included to show regional trends and a basis for interpolation in areas of low/no well data. With Roknowledge interpreters can concentrate on seismic modelling rather than log inconsistencies, thereby saving investment time and cost.
1D AVO analysis of Cenozoic section for single wall
Map of study area and well locations
Petrophysical interpretation and log fluid substitution with dry rock modelling
Data trends, equations, relationships, averages, pressure and temperature will be provided together with interpretations and correlations from existing wells.
The content of Roknowledge will be drawn from about 50 wells over 28 fields within the Moray Firth and from adjacent areas, North Sea UKCS.
Single well Vp/Rho Lithology Crossplot
- AVO analysis provided in blocky, 1D and 2D with inversions for elastic properties provide in order to analyse the Water/Oil/Gas response.
- Depth relationships (Vp-Depth, Vs-Depth, Rho-Depth, Al-Depth, El 2-term-depth, K dry-depth) for brine-saturated cases.
- Interpretations revealing relationships and trends for petro-elastic properties based on single well and multi-well correlations for P-wave velocity, Shear velocity, Density, Acoustic Impedance, Elastic Impedance, Lambda-Rho and Mu-Rho
Blocky AVO analysis Cenozoic interval (sand on shale)
AI-EI-SI Constrast Analyser
Shale kdry/depth Vshale trend crossplot
It is proposed that Roknowledge would offer the following key deliverables:
- Acoustic properties with depth for different different lithologies. Well correlations based on geological age sub-divisions for sandstone, shale and limestone.
- Equations for Vp-Rho and Vp-Vs for Sandstones, Shales and Limestones for each geological sub-division for brine saturated case.
- LAS data and a.rok file for use with the RokDoc sofwtare.