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SeisTool® — the integrated rock physics platform, in full.

TraceSeis, Inc. provides services and software to characterize the relationship that rock and reservoir properties have with seismic data — all with the objective of reducing risk in quantifying reservoir (or resource) properties using well-calibrated seismic. The design premise behind every TraceSeis software product is the same: generate quality products with ease, minimum system overhead, and minimum book-keeping.

This page is the complete, unabridged write-up of SeisTool® and each of its modules — SeisRP, SeisMod, SeisChar, and the supporting Utilities and Statistics tools — exactly as detailed in TraceSeis' software documentation.

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Overview SeisRP® SeisMod SeisChar Utilities Statistics

Integrated Tools for Advanced Rock Physics Analysis

The TraceSeis Rock Physics Package

The TraceSeis Rock Physics Package provides powerful software solutions for analyzing the critical relationships between rock properties (Vp, Vs, density) and reservoir properties (porosity, lithology, fluids). Our comprehensive suite includes three specialized modules that work together to deliver superior reservoir characterization results.

Click here for a short presentation on SeisTool ↗

Designed for Exploration and Development Geoscientists

Our rock physics tools are specifically engineered to increase productivity and reduce errors through:

Streamlined workflow with predefined templates that minimize display set-up time
Real-time computation and visualization with on-the-fly data processing
Elimination of book-keeping requirements, reducing analysis time and error potential
Intuitive interface designed for geoscientists, not just rock physics specialists

Note: TraceSeis' rock physics tools work with specific input logs (rock and reservoir properties) and do not perform petrophysical evaluations.

Our Three Specialized Modules

SeisRP, SeisMod, and SeisChar each address one stage of the risk-reduction workflow — together they take you from raw logs to defensible reservoir property estimates. The sections below reproduce the full documentation for each module, plus the supporting Utilities and Statistics tools.

Module One

SeisRP®: Advanced Relationship Analysis

Click here for a short presentation on SeisRP ↗

SeisRP facilitates analysis of the relationship that reflectivities, relative properties and absolute rock properties have with reservoir properties (porosity, lithology and pore fluids).

Analysis at Well-Log Resolution

Analysis of the relationship that reservoir properties have with elastic properties. The seismic equivalent of the evaluated rock properties is obtained through AVO analysis and seismic inversion.
The module computes and evaluates: absolute properties, relative properties, or reflectivities; and modeled or measured elastic properties.
Analysis can be done in depth or two-way time and at well-log or seismic resolutions.

Analysis at Seismic Resolution

A time-depth relationship is created by integrating the sonic log.
A user-selected wavelet defines the bandwidth of the synthetic gather and attributes.
Rock properties, relative properties and reflectivities are mapped to two-way-time and displayed at seismic resolution.
Scatter-plots of the selected seismic attributes colored by pay-flag are part of the analysis at seismic resolution.

Fluids' Analysis

Changes in elastic moduli and density of fluids modify the seismic response.
Well-bore environment (pressure and temperature) and fluids' composition (gas specific gravity, oil API, live oil GOR and brine salinity) are used to compute moduli and densities of each of the fluids.
Moduli and density of three fluids are defined: in-situ, replacement, and brine.
Fluids (hydrocarbon and brine) are analytically mixed to obtain the fluids' properties as a function of fluid saturation.
Fluid-substituted rock properties' logs and synthetic seismic can be analyzed after the fluid properties have been defined.

Module Two

SeisMod: Powerful Forward Modeling for Reservoir Property Analysis

Click here for a short presentation on SeisMod ↗

Advanced Rock Physics Modeling for Reservoir Characterization. SeisMod creates comprehensive rock physics models for forward modeling Vp, Vs, and density logs across various reservoir conditions. This powerful tool generates derived attributes including relative properties and reflectivities from modeled logs at both well-log and seismic resolutions in time or depth domains.

Rock Physics Model Foundation

The foundation of SeisMod's capabilities is a robust rock physics model comprising:

Moduli and densities of rock constituents
Effective media relationships that accurately reconstruct measured rock properties

Well-Log Inversion: Building the Rock Physics Model

SeisMod allows precise definition of your rock physics model through:

Effective Media Relationship Selection

Solid mixing relationships: Hill Average, Hashin-Shtrikman, and more
Fluid mixing approaches: Wood, patchy, and alternatives
Porosity inclusion methods: Krief, critical porosity, and others
Fluid inclusion modeling: Gassmann's equations

Rock Constituent Property Estimation

Volume fraction determination: Uses inputs from petrophysical/mineralogical evaluations (note: these evaluations are performed outside SeisMod)
Fluid property computation: Utilizes Batzle and Wang equations for accurate fluid moduli and densities
Solid constituent analysis: Employs iterative well-log inversion to determine optimal moduli and densities

The final model parameters are those that minimize differences between modeled and measured logs, ensuring the highest accuracy in subsequent analysis.

Well-Log Modeling: Forward Prediction

Once your rock physics model is defined, SeisMod enables:

Modification of reservoir properties
Reconstruction of Vp, Vs, and density logs under different conditions
Computation of relative/absolute rock properties or reflectivities
Analysis at well-log or seismic resolutions in time or depth domains
Property variation by percentage of in-situ value or as constant volume fraction ranges
Time-domain plotting at in-situ time-depth or at two-way-time resulting from property modifications

3D Model: Advanced Synthetic Dataset Creation

The 3D Model module creates datasets with perturbed well-data in target intervals, generating synthetic seismic for:

Evaluation and calibration of seismic inversions
Estimation of seismic attributes' sensitivity to petrophysical property changes

3D Model Methodology

Creates a 3D volume of petrophysical properties from well evaluation, with two properties modified along inline and crossline directions (e.g., porosity in inline, mineralogy in crossline)
Computes Elastic Rock Properties (Vp, Vs) and density for each pseudo-well in the 3D volume
Calculates seismic attributes in time or depth at well-log or seismic resolutions

Module Three

SeisChar: Reservoir Property Estimation

Click here for a short presentation on SeisChar ↗

Trains a linear neural network (LNN) to estimate reservoir properties from rock properties and derived properties (relative properties and reflectivities). Analysis can be done in depth at well-log resolution or in time at seismic resolution.

Reservoir Properties

Trains an LNN to estimate reservoir properties from rock properties and derived properties.
Provides the parameters to estimate reservoir properties from seismic data.
Analysis can be done in depth at well-log resolution or in time at seismic resolution.

Probability Analysis Under Development

Sensitivity Bar-Graph

Evaluates the weight that selected attributes have in the estimation of a given reservoir property. Results are presented in a bar-graph.

Why It All Fits Together

Transform your reservoir characterization process.

TraceSeis' Rock Physics Package empowers geoscientists to develop a deeper understanding of rock-property relationships, create accurate physics-based models, and generate reliable reservoir property estimates from seismic data — all through an integrated, user-friendly software suite designed to maximize productivity and minimize errors.

Beyond SeisTool, TraceSeis' software roadmap also includes SeisInv — seismic inversion to reservoir properties — currently under development.