SynthRock

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SynthRock

Forward pseudo-well modeling and probabilistic inversion package

SynthRock is a forward pseudo-well modeling and probabilistic inversion package to achieve qualitative and quantitative seismic interpretation. It supports wedge models, stochastic models, pre- and post-stack synthetic seismograms and cross-matching (HitCube) inversion.

Integrating Rock Physics, Geology & Seismic

Forward modeling of synthetic seismic data plays a key role in understanding the seismic response of a target interval. A thorough understanding of the response enables interpreters to separate true hydrocarbon anomalies from false positives and to make more accurate reservoir predictions. In a forward model, geologic information and synthetic seismic data is integrated through a rock physics model.

Sophisticated workflows in which model parameters are varied stochastically can be run to create a data base of pseudo-wells, representative of the expected geologic and seismic variations at target level. Such models are then used to predict rock properties with uncertainties from pre- and post-stack seismic volumes.

Creating Simple Wedge Models

Simple wedge models can be created in OpendTect itself. Models are typically constructed from a limited number of layers in which model parameters are varied laterally. SynthRock users benefit from a superior ray-tracer for improved pre-stack synthetics. Biot-Gassmann fluid replacement and other common rock-physics relationships are also available in SynthRock through the rock physics library.

SynthRock Profile Module7

Profile Module to Create Pseudo-Wells

The profile module allows the construction of two-dimensional cross-sections with model construction initiated from one or more real wells. A profile of pseudo-wells is created by interpolating and extrapolating well logs from the starting well positions with the user having full control over all model parameters.

Stochastic Module for Seismic Inversion

SynthRock Stoch

The stochastic module is used to create thousands of pseudo-wells for seismic inversion purposes. Modeling constraints are derived by analyzing real well data in OpendTect’s cross-plot utility. With geologic insight, the user can thus create a pseudo-well data base that truly captures all geologic and seismic variations in the target interval.

SynthRock HitCube

HitCube Inversion to Create Probability Volumes

The HitCube inversion is a stochastic inversion where pseudo-well synthetics are matched against measured seismic responses. It can be achieved in an entire 3D or 4D survey or limited to the reservoir level. The best scoring models are statistically analyzed to generate probability volumes of relevant reservoir properties with their uncertainties.

dGB Earth Sciences

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