User's Manual

Table Of Contents

Preliminary

RT 1000 v1.0 24 Deployment Guide R01

Rolling

You can roll the line or roll the stations.

6.1 Rolling the Line

6.1.1 Overview

This chapter describes how to move the ground equipment across the survey

area when rolling the line.

Rolling a line segment in your seismic data acquisition project means that you

can set up part of the equipment and then start firing shots and gathering

data. Once shooting is complete for a specified line segment, you can pick up

the equipment and move it to a new location while shooting continues on a

different line segment.

You should follow best practices as recommended by your company or the

industry; however, the following should be considered when planning your roll

procedures:

 Pickup and layout crews pick up lines behind production and lay them out

ahead of production. Depending on battery charge state, equipment may

circulate through staging or go directly from one line to the next.

 In order to make most efficient use of layout crews, it is common to lay out

entire receiver lines at a time even if they are longer than the template.

This way crews don’t need to spend time walking or driving from one line

to the next picking up or laying out small amounts of equipment. However,

if the size of the survey is large and receivers per line multiplied by the

number of lines is larger than the number of channels available, it may be

necessary to roll in the inline direction. In this case, it is necessary to be

able to pick up and lay out WRUs in quantities smaller than a rib; for

example increments of six WRUs.

 During inline roll operations, it may be desirable to add newly deployed

WRUs to an existing (discovered) rib. The Observer can instruct the last

WRU in a rib to poll for neighbors during recording. Newly added WRUs can

begin recording immediately.