Various seismic inversion methods are used to stochastically generate properties such as hydrocarbon saturation, porosity, and volume of shale etc. in conventional reservoir rocks, and total organic carbon (TOC) & brittleness in the unconventional reservoirs.
We are using a new form of rock physics derived inversion which enables us to extract information namely:
- Identification and quantification of hydrocarbon in conventional reservoirs using prestack inverted seismic data.
- Quantification of total organic carbon (TOC) in potential source rocks related to unconventional reservoirs.
- Measurement of brittleness within shale to validate unconventional reservoir properties.
This new approach facilitates to precisely locate a hydrocarbon trap, compute the hydrocarbon saturation, calculate the total oil/gas volume in a reservoir and determine the economics before drilling a well. The methods related to the unconventional reservoir can be used to locate and quantify TOC in source rock, and the brittle zones. Furthermore, the techniques are useful for optimizing well location and trajectory, field development, reservoir modelling and 4D seismic analysis.
What is Sensitivity Analysis?
Using elastic properties from wireline log data it is possible to evaluate if hydrocarbon saturation in conventional reservoir and TOC/Brittleness in unconventional reservoirs can be quantified using prestack seismic inverted data. The precision of output will, of course, be dependent on seismic resolution, target reservoir thickness, degree/nature of diagenesis and lithologic variations.
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