User's Manual

Table Of Contents

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20 RT 1000 v1.0 Deployment Guide R00.f

Testing and Maintaining the Equipment

Testing the Layout

be done over the source controller RF interface or when wired directly to the

source controller. Hardwired similarity tests are more accurate, and the results will

need to be compared to radio similarity tests. Similarity tests, as well as pulse

tests to confirm that vibrators are synchronized, will likely need to be conducted at

the beginning of the survey, and at sweep parameter changes. Radio similarities

are conducted more frequently, measuring and recording raw ground-force versus

time and phase versus time. Frequency of tests will be agreed to by the Oil

Company and Seismic Contractor prior to the start of the project.

Dynamite control testing is simpler than vibroseis. Timing between the source

controller and blaster pack can be verified using a storage scope. This is done by

hooking up one scope input to the encoder and the other to each decoder that is to

be used.

4.2.3 Acquisition Parameter Testing

For most surveys, except those where an Oil Company and/or seismic contractor

have extensive local experience, the Oil Company will conduct a series of

parameter tests. This will likely be under a separate pricing scheme in the

contract, and may take a half to several days. In some cases an advance crew will

be sent to an area to perform parameter testing. It may also take place with a

subset of the patch, for example only a single receiver line. The parameters to be

tested may include:

• Dynamite charge size

• Dynamite hole depth

• Dynamite hole array (number of holes and pattern)

• Vibrator array (number of vibrators and pattern)

• Vibrator sweep configuration

o Sweep length