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How
Involve persons who
are well experienced in the type of survey you intend to conduct from the
earliest stages. The amount of time and cost is minimal especially when
compared to the potential benefits.
A geophysical model
should be developed to determine the necessary acquisition parameters.
Scouting is very
important and should consider: terrain, elevations, elevation change,
surface conditions, marine conditions, water bottom conditions, depth
changes, tides, currents, climate, winds, sea states, access, practical
techniques, coverage limitations, local permit issues, safety issues,
environmental concerns and limitations, panoramic view photos tied to a
key map.
Existing seismic data
should be reviewed to estimate source effort and fold requirements to meet
the required signal to noise ratio at the target horizons.
Specific technical and
equipment requirements, such as field data QA processing or sensor
positioning assurance, should be identified.
Identify potential
contractors. Early meetings with contractors, except to talk in broad
terms, are frequently unhelpful as the client is subjected to sales
pressure and a myriad of suggestions that are aimed at selling their
services.
A bid request should
be produced that reflects the range of acquisition parameters to be
considered and allows sufficient program flexibility to allow for changing
source effort requirements. The bid request should ask for information on:
proposed crew availability, crew schedule, crew equipment and personnel
staffing, total estimated project cost including a break down of proposed
reimbursable items, the proposed geophysical instrumentation showing it's
date of manufacture and current disposition, the proposed senior crew
personnel including experience and education and the Contractor's HSE
program. A copy of the scouting report, required technical specifications
and maps should be included.
Bids should be
analyzed taking into careful consideration realistic field conditions,
potential cost overruns, technical capabilities, quality specifications
and contractor experience. Bid analysis should be an “apples to apples”
comparison. Bid clarification questions should be sent to bidders. If
necessary contractor crews should be visited to review technical
capability, crew performance and instrument quality.
Discussions should be
held with short-listed contractors to review possible design, parameter,
equipment changes that could enhance data quality, improve acquisition
efficiency, reduce costs or reduce survey risks. Contractor financial
stability should be assessed.
Final project budget
estimate should be produced. Adjustments to program based on bid analysis
to meet budget restrictions.
Final contract
negotiation with successful bidder.
We then move into the
crew operations phase.
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