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Get the Most from Seismic Inversion: An Overview of Plugins and Modules

There are a variety of seismic inversion software packages out there as well as modules and plugins which are designed to make the process easier. Some examples of seismic inversion software which is available is Petrel and IHS Markit’s Kingdom packages, which have modules and plugins, such as Equipoise Software’s Inseis / Kingdom Seismic Inversion.

What’s the Difference Between Kingdom Seismic Inversion / InSeis?

Not really all that much, to be frank. Both modules / plugins are about the same in forms of functionality, workflow and user interface, and offer the same levels of insight into varying forms of seismic inversion, such as coloured inversion and simulated annealing inversion.

The difference between Kingdom Seismic Inversion and InSeis is quite simply how it interacts with the base program, and from a user perspective are absolutely identical. Both InSeis and Kingdom Seismic Inversion allow for far superior coloured inversion thanks to its ability to transform images of seismic reflectivity into band limited seismic impedance.

What’s the Point of Modules / Plugins Added onto Programs? Petrel and IHS Kingdom Do The Same Thing, Surely?

Well, yes, but the entire point of InSeis and Kingdom Seismic Inversion respectively is the simplification of the procedure as well as the clarification of data of which both programs provide. While indeed, as standalone programs, Petrel and IHS Kigdom are accurate, InSeis / Kingdom Seismic Inversion provides extra certainty by subjecting Kingdom and Petrel’s results with its own algorithms, in order to allow you, as an interpreter, more information about what you are surveying than what is normally available.

InSeis also boasts ease of use as a routine part of seismic interpretation – not to mention its use in clearing data.

It goes without saying that seismic waves are produced by the generation of waves within the ground, and that these waves are reflected back off surfaces and are picked up again using an instrument known as geophones.

The timing of the wavelengths, as well as the wavelength itself indicates the boundaries between the different rocks of the earth’s surface from aforementioned recording via geophone.

But what exactly does coloured inversion have to do with any of this? How exactly did coloured inversion become important? The answer of which is that a wavelength can only really tell us so much, and not knowing is known as “uncertainty”, and a lot of processing is required in order to make sure that a compiled image is the most accurate picture which can possibly be made.

 Seismic inversion and coloured inversion are processes which are intended to learn more about the rocks themselves, in order to minimise uncertainty.

A specialist activity which has been detailed in a number of specialist blogs, coloured inversion is essential for providing inverted data but said inverted data is best used only in a small amount of cases. However, a good geophysicist company prepares for any circumstance, and coloured inversion was created in order to perform better than traditional algorithms such as recursive inversion, and benchmarks very well against sparse spike inversion – which is very well known to geophysicists and petrophysicists as a rather convoluted and wasteful process.

 Coloured inversion is an algorithm which is designed in order to match the average spectrum of inverted seismic data with an average spectrum observed impedance. The Earth’s own reflectivity is fractal, and the amplitude spectrum favours blueing results (denoted by high frequency) and therefore coloured inversion is the means of finding high frequency and also even higher results.