Velocity Modeling
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Description of Service
Velocity modeling is important aspect in the cycle of seismic interpretation. Seismic velocities conversion, well velocities utilization and corrections- everything affects the final output. So, experienced interpreter only can generate a reliable velocity model.
The best workflow which Ameyem followed to build velocity model is given below. This workflow is best suited for every developed or exploration block. Depending on the client requirements Ameyem can deviate from this workflow if need be there.
Loading of Stacking velocity & QC:
Usually in exploration blocks and less likely in development blocks there are different vintages data need to be used. Stacking velocity of various vintages need to be merged. This can be done before loading or after loading depending on the ease. But before that, you may need to delete vintages which are grossly dissimilar.
Velocity conversion upscale to model grid:
After loading and QCing the data one needs to Upscale the data. This is usually done in following steps.
- Upscale the Average velocity property to structural 3D grid, which was prepared using the time horizon and fault plane grids, for further processes
- Upscale well average velocity deduced from T-D relation in the wells wherever it exists
Kriging and Co-Kriging:
Kriging and Co-Kriging are so far best methods available for interpolation. We recommend using these methods almost in every velocity modeling work.
- The average velocity to be Kriged using the modelled variogram for realization of the same where it has not been sampled
- Collocated Co-kriging method to be used to realize the well velocities throughout the 3D grid ussing the trend of Seismic average velocity grid
Velocity model:
Finally a velocity model can be built with velocity modeling module using the average velocity property and the time surfaces from Datum to below the deep target horizon.
Depth Conversion:
The resultant velocity model can be used to depth convert time grids and these resultant surfaces further used to prepare well tied depth structural model, as the simple depth grids do not represent actual depth model.
What You Will Get From Purchasing This Professional Service. Deliverables
Petroleum Industry and Mining Industry face different kind of problems at different times. We at Ameyem are equipped with smart tools to tackle all sorts of problems faced by industry. Ameyem not only provide conventional solutions like, Seismic Data interpretation, Petrophysical Analysis, Rock Physics, AVO analysis but also provide solutions to those problems with unique requirements, such as Well log digitization, Seismic signal digitization from hard copies. We employ various Machine Learning techniques to address specific problems of industry, such as missing log generation, un-recorded log generation, petrophysical log creation using core samples and wireline logs and seismic inversion with ultimate quality.
Duration To Complete Service. How Long Before Service Is Completed
1-12 weeks
About Ameyem
Geophysical services such as Seismic Interpretation from strat to prospectivity analysis & volumetrics, various Geophysical surveys- we provide services with utmost care on quality. We not only provide conventional services but we are equipped with the tools to provide most advanced services like Machine learning applications in Oil & Gas Industry.
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