Reservoir Technology

RESERVOIR HIGHLIGHTS

Reservoir Geophysics Services were initiated at Sensor Geophysical in the fall of 2003.
Sensors’ Reservoir Geophysics Services for complex reservoir characterization projects are based on full integration of seismic data with petrophysical and geological data.
Petrophysical well analysis has been completed for hundreds of wells.
Reservoir attribute analysis work has been successfully completed for more than 100 projects consisting of 2D lines and 3D volumes.
Data volumes for 3D projects have ranged from several hundred shot records to 55,000 shot records.
Projects reflect extensive domestic and international experience in all types of reservoirs (clastic and carbonate prospects as well as heavy oil).

AVO: AVO modeling, fluid replacement modeling and attribute analysis of the pre-stack seismic response designed to estimate lithology and fluid changes on reservoir rocks.
Deterministic Inversion: Several seismic inversion techniques including model based, sparse spike and neural network are available to produce impedance volumes that can be used to calculate Lambda-Rho (Incompressibility) and Mu-Rho (Rigidity) volumes.
Stochastic Inversion: A process designed to generate high resolution impedance reservoir models which capture the uncertainty and hence help to assess risk. The process is sequential gaussian simulation (SGS) which aims to match the input seismic data and can be constrained by a soft model e.g a deterministic inversion.
Neural Network Analysis: Reservoir properties may be estimated with this tool using a combination of well logs and seismic attributes.
Registration of the PP and PS seismic data
Joint PP and PS Inversion
Multi-volume Visualization
Spectral Decomposition (DFT, CWT, S transform)
Seismic Facies Classification
Fracture Detection Analysis using AVAz and Volume Curvature Attributes

AVO MODELING & FLUID REPLACEMENT MODELING

Comprehensive log editing and Petrophysical log transforms
Graphical log/seismic correlation
Log crossplotting for petrophysical parameter determination
Ray trace and full elastic wave methodologies to create full AVO offset synthetic gathers
Isotropic and anisotropic modeling
Fluid replacement modeling
Event picking on models for graphical comparison to seismic events
AVO attributes analysis of models

AVO ANALYSIS

Precondition the pre-stack seismic data with “AVO friendly” procedures
Arbitrary line viewing of gathers and partial stacks
Amplitude vs. offset graphs for picked events
Transformation between offset and angle domain
Range limited stacks
Super gather generation
Select the optimum AVO attributes (intercept, gradient, curvature, P-wave and S-wave Impedance Reflectivity, Fluid Factor) based on feasibility studies
Volume or map-based attribute analysis
3D visualization of AVO attributes for quality control and interpretation
AVO attribute cross-plotting including mapping back to seismic of the cross-plot zones

RESERVOIR PROPERTIES - LMR

P-impedance, S-impedance and Elastic impedance Model design in time or depth domain based on vertical and/or deviated wells
Wavelet extraction and well correlation
Seismic inversion studies using several inversion techniques: model based, band limited, sparse spike, neural network, Lambda-Mu-Rho.
Computation and interpretation of acoustic impedance volumes
Results calibration to rock properties
Volume or map-based interpretation
3D visualization of the reservoir properties volumes for quality control and interpretation
Volume co-rendering and cross-plotting (including mapping back to seismic of the cross-plot zone

PROPRIETARY SENSOR GEOPHYSICAL SOFTWARE

FDA (Fracture Detection Analysis) using 3D azimuthal AVO technique (AVAZ).
TFAN (Time-Frequency Adaptive Noise Suppression) Noise attenuation module designed specifically for AVO compliant preconditioning of the pre-stack data prior to attribute analysis.
OCGC (Offset Consistent Gain Control) Scaling module designed for AVO compliant preconditioning.

HAMPSON-RUSSELL SOFTWARE

GEOMODELING CORPORATION SOFTWARE

IKON SCIENCE SOFTWARE