Well Tie

Quality Well Ties for Better Understanding of Seismic Character

Accurately tying wells and seismic information is a necessary step in reservoir characterization. Often considered the domain of specialists, the process can now be achieved by petrophysicists, geologists and others involved in the work.
Jason Well Tie™ provides a highly visual and interactive environment for creating, refining and QC'ing the wavelet following a streamlined workflow. This true multi-well, multi-trace environment speeds the well tying process while ensuring a best fit wavelet for all wells and seismic data.

With a proper wavelet, the user can be confident in the results of:

Seismic Interpretation – knowing the phase
Synthetic Modeling - properly reproducing the traces from well reflectivity
AVO Modeling and Analysis
Deterministic Inversion
Geostatistical Inversion

Fugro-Jason has developed and delivered several generations of wavelet estimation technology since its founding in the 1980s. Fugro-Jason's commitment to research and development is unmatched in the industry.

Methodology

Jason Well Tie uses seismic and well impedance to derive a best fit wavelet. This wavelet is then used to find a best fit impedance from the traces around the well. Comparison of this impedance to well impedance provides a critical QC, which will likely result in a refinement to the well tie. This process of small edits followed by wavelet updates is repeated until well impedance and seismic impedance using the estimated wavelet converge and two other easy-to-understand QC's have been met.

Jason Well Tie uses powerful inversion techniques, following an initial use of the Roy White method. This constrained sparse spike inversion results in a more consistent and accurate wavelet estimation. This iterative method combines full wavelet amplitude and phase spectrum estimation.

Well Log Editing

The Well Log Editor incorporated in Jason Well Tie works natively in time and depth and provides all the stretch/squeeze, sonic correction and tops picking/editing tools required to prepare logs for wavelet estimation or use in seismic analysis.

Wavelet Creation and Editing
Well Tie includes the following capabilities for wavelet creation and editing:
Create, Scale and Edit Synthetic Wavelets
Transform Wavelet (for zero-phasing seismic for interpretation)
Merge Wavelet Amplitude and Phase Spectra
Find optimal well position
Support AVO reconnaissance and analysis, Elastic Impedance and AVO/AVA Gather modes

Multi-Well, Multi-Trace Wavelet Estimation

Jason Well Tie supports full stack or AVA/AVO mode for multi-well, multi-trace wavelet estimation. Features include:

Estimate Wavelet Amplitude Spectrum
Estimate Wavelet Constant Phase Spectrum
Estimate Constrained AVO/AVA Wavelet
Estimate Wavelet Amplitude and Phase Spectrum
Sensitivity Analysis
Wavelet phase rotation analysis, shifting and scaling
Full waveform synthetic modeling in the Well Editor

Integrated Quality Control

QC tests are available throughout the wavelet estimation and well tie processes. Among the many quality control panels are:

Autocorrelation spectral QC
Wavelet amplitude and phase
QC on stretch/squeeze velocities from the well

These panels provide a visual cue to problems with the wavelet and data that can be used to correct them. The combination of a streamlined process, inversion-based estimation, true multi-well handling and frequent QC steps gives Jason Well Tie users a straightforward and reliable method of identifying the best fit wavelet for their data.