Freelance Gephysical Consultants Ltd




  • Our consultants, mostly South Americans have years of experience throughout South and Central America, providing supervision of field quality control, scouting of areas of interest, safety and environmental reporting , all to complete satisfaction of our clients. They all are well acquainted with the E& P and IAGC safety environmental policies to be carried out in the field.
  • Our field acquisition consultants deal with:

Line Opening and Survey

Logistic Planning

Survey or Navigation check

Environment

Safety

Drilling

Choosing the Field Variables

Field QC Processing

Seismic Data Acquisition QC

LAND OPERATIONS DAILY CHECK ROUTINES: Start-Up Technical Audits. Land Recording Instrument Daily Test (I/O, ARAM, Sercel). Cable Shop work Supervision of the daily rotation for cables and geophone strings. Land survey pre-plot versus post-plot coordinates. Coordinates conversion parameters check (WGS-84 to Local Datum). Satellite Receivers PDOP, HDOP and VDOP be on specs and Instrument Calibration. SPS file check. Vibroseis Radio and Hard-wire Similarity Test and all Vibroseis Attributes. Fundamental Ground Force. Average and Peak Phase. Average and Peak Harmonic Distortion. Ground Stiffness and Ground Viscosity Attributes. Average and Peak Force. COG (Center of Gravity for the Vibrators daily production). HSE practice and Waste Management. Uphole survey check and verify statics calculations. Field QC processing check & generation of 3D Volumes, Brute Stacks and Time Slices for each Swath. QC Check for all the attributes of the BIN (fold of coverage, offset ranges & azimuth distribution). Daily Safety Meetings and Crew Audits. LAND & MARINE DAILY CHECK ROUTINES:

Start-Up Technical Audits. Marine Recording Instrument Daily Test (Sercel, SeArray Seal,I/O MSX or Syntrak). Air Gun Timing Accuracy. Marine Real Time Binning System. Navigation network accuracy, Digital DGPS, Acoustic and Laser Positioning. Streamer Separation.

Navigation processing and Seismic field QC processing of the data. Satellite Receivers PDOP, HDOP and VDOP be on specs. Review and discuss the 3D INFILL with Contractor's Party Manager.

Proper formatting and accuracy of the UKOOA (P2/91 or P2/94) geometry file generated by the Navigation Department. QC Check for all the attributes of the BIN (fold of coverage, offset ranges & azimuth distribution). Marine Gravity and Magnetic Data Acquisition QC, including Still Readings.