VIEWSEIS

VIEWSEIS is an integrated system that covers all aspects of seismic refraction analyses using either the Time-Intercept, Delay Time or Generalized Reciprocal Method (GRM).  Functions include arrival-time modelling, first-break picking, layer assignment, velocity analysis and depth migration.

VIEWSEIS is a complete system for:

  • Interactive analyses
  • First-Break Picking
  • Arrival-Time Analysis
  • Seismic Modelling
  • Arrival-Time Phantoming
  • GRM XY Analysis
  • Velocity Analysis
  • Time-Depth Analysis
  • Depth Migration
  • Output

 

VIEWSEIS - Product Details

Arrival Time Data Input

First Break Picking:

  • Make all first-break picks with the mouse; assign layer numbers and review velocities during picking
  • Display the trace data in either Variable Area, Wiggle, or unique "Colour Wiggle" formats
  • Adjust the trace gain scaling and zoom in on a smaller time window and fewer traces to improve pick accuracy
  • Load trace data from common seismograph file formats, including ABEM, Bison, EG&G, OYO, Proseis, Scintrex, SEG-1, SEG-2 and SEG-Y standards, including all floating-point formats
  • Sum polarized records to cancel compressional wave energy from shear wave refraction records
  • Use the Auto Pick function for quick, consistent picks

Data Entry and Editing:

  • Full-screen input and editing of 12 to 96 channel data, with forward, mid, and reverse shot types
  • Define over 100 shots per seismic line, with any geophone spacing
  • Shift the line origin, reverse the viewing angle, and instantly convert between feet and metres, even after interpretation

Arrival Time Analysis

Layer Number Assignment:

  • Interactively assign arrivals to one of nine subsurface layers
  • Velocity and intercept time calculations are displayed to aid layer assignment
  • "Re-number" any layer group to insert or merge layers
  • All layer number assignments are stored, allowing later editing.  Ignore poor arrival time picks by assignment to a "garbage" layer
  • Automatic interpolation, if necessary, of any missing arrivals due to bad geophones
  • Automatic averaging of arrival times when overlapping or duplicate data exists

Seismic Refraction Modelling:

  • Plot theoretical arrivals from user-defined layer thicknesses, velocities and spread geometry
  • Use the model for survey geometry design, hidden layer and theoretical XY calculations
  • Graphically overlay model results on actual arrivals
  • Graphically compare two model cases, each with up to nine layers

Flexible Display Option:

  • Show or hide arrivals, and assign symbols and colours, according to shot number or layer number
  • Display phantomed and/or unphantomed data
  • Show or hide layer numbers, regression lines and velocities
  • Display any combination of forward, reverse and mid-shot types
  • Display the entire seismic line, or quickly zoom in on a smaller segment for more detailed analysis

Data Phantoming:

  • Phantom any arrival, including partial forward and reverse segments from mid-shots
  • Clear phantoming on any shot, and re-phantom at any time
  • Use temporary "overlay phantoming" to improve layer assignment when irregular layer interfaces are encountered

XY and Velocity Analysis

  • Compare and determine the optimum GRM XY value by selecting the start, increment and end XY values
  • Remove a slope from the velocity analysis curves to more accurately determine velocity variation (i.e., regression residual calculations)
  • Define laterally varying XY and velocity in up to 20 line segments per layer
  • Smooth velocity transitions along the line using an n-point weighted moving average
  • Plot the time-depth curves as a function of G position, laterally changing XY and velocity
 

Depth Migration

  • Migrate to depth using either the GRM Approximate Velocity Method or Average Upper Layer Velocity Method.  If insufficient data for the GRM, Delay time and Time Intercept methods can be used.
  • Plot layer surfaces using any layer arc swing angle, or straight line segments
  • Enter evenly or unevenly spaced ground surface information.  VIEWSEIS automatically interpolates to geophone positions.

Program Output

  • Complete user-control of all scaling parameters, page size, labels, ticks and grid lines
  • Output support for over 100 devices
  • Output preview function
  • Computer Aided Drafting (CAD) interface allows unlimited output customization.  Support for DX file transfer to AutoCad, Generic CAD, EasyCAD and others.

System Features

  • Comprehensive Help system available from all menus
  • Program documentation and GRM tutorial
  • Advanced file system saves all data, interpretation and screen set-up for each seismic line.

Pricing

VIEWSEIS: USD$1,400

Discounts

Multiple System Discounts:

License Number

Discount

Second License

15%

Third License

20%

Fourth License

25%

Site Licences: Price available upon request. 

University Discount:   30%

ALL PRICES SUBJECT TO CHANGE WITHOUT NOTICE