Joint Porosity and Saturation Inversion

Bridging the Gap from Seismic to Simulation

Porosity saturation joint inversion was designed as a proprietary WesternGeco method to robustly predict porosity and saturation from seismic data based on a multidimensional matrix of prestack inversion measurements. It is a key component of bridging the gap from seismic to simulation.

The MMRD multimeasurement reservoir definition interactive software applications, enabling seismic to simulator workflows, are split between four intuitive modules, which are fully linked to the MMRD database:

• Providing an interface to input log data for sands and parameterize fluid and rock matrix properties
• Simulating the user's model based on defined expected value ranges
• Allowing the user to decide which seismic measurements to use, while also giving the uncertainty error associated with these parameters
• Running the porosity saturation joint inversion and providing interactive outputs to the MMRD software's 1D, 2D, and/or 3D viewers (particularly useful for quickly testing a number of test results)

The whole flow can be easily implemented using any inversion result from the MMRD service or other software (including the ISIS suite of reservoir characterization technology, hybrid AVO/inversion, and elastic impedance inversion). The approach works particularly well when used in conjunction with the lithology classification modules, which provide a means to focus on specific reservoir types.

The workflow further enhances the value of seismic data and transforms them into quantitative reservoir properties that can be directly utilized in reservoir modeling studies.