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Land Seismic

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Zupt Onshore Solutions

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Land Seismic
Land Seismic

Land Seismic

Land Seismic and Why Inertial?

Zupt provides inertial solutions that increase the productivity and accuracy of Land Seismic operations where GPS is inaccessible and optical methods are impractical or inefficient.

In many active geographical regions of land seismic exploration, the canopy (trees/forestation) does not allow RTK GPS to be used for the precise placement of survey stakes. The signals from the satellite segment of GPS systems cannot penetrate through the vegetation to the receivers being carried by the field surveyors.

While optical survey techniques can be used when the canopy or terrain limits GPS operations, it requires extensive cutting and clearing to allow access for the survey crews and “line of sight” for the surveyors to operate. This cutting takes a significant amount of time and can have detrimental ecological and environmental effects in the surveyed areas due to the removal of vegetation when clearing these paths.

Zupt’s inertial solution for land seismic surveys, the B-PINS, allows survey operations with minimal cutting and clearing, while significantly increasing production of field survey crews. One inertial survey crew using B-PINS can easily deliver the production of several conventional crews.

Driller and Shooter Friendly Surveys

Our B-PINS inertial solution eliminates the need of “line of sight” in land seismic operations to provide comprehensive efficiency across these areas. The requirements for near straight and clear-cut receiver lines still exist for inertial survey operations, but occasional obstacles can be left in place and worked around with only slight offsets.

A clear, well-flagged line with easy access is the primary focus when working on source lines for high production drilling crews. Conventional (theodolite) surveying techniques often lead to impossible slopes, increased cutting, and dangerous drilling conditions because of line of sight limitations. Inertial lines will give drillers better access than conventional crews with a slightly winding, well-flagged path that can move around thick bush and allow manageable slopes for the drilling hardware. Even with optical surveys, drillers often need to move the shot point a few feet away from the installed stake because the stake has been placed on an inaccessible location, e.g. by a fence, under a tree, on a berm or a ditch, making it impossible to drill. By moving the stake, the overall accuracy of the seismic project is reduced, as the relocated drill point is rarely resurveyed.

Our “Driller Friendly” inertial method allows surveyors to create a path of least resistance that allows the drillers and shooters to increase productivity while remaining safe, and lessening the impact on the environment.

Survey Control

Accuracy and reliability are an important factor of efficient land seismic surveys. Zupt’s B-PINS utilize multiple methods to control the accuracy and reliability of an inertial survey.

Inertial surveyors utilize a control network that has been established through triangulation, traversing, or GPS. Post-processed GPS is typically used for the First Order network, and possibly RTK GPS for the Intermediate control network.

Inertial zero velocity updates, or zupts, allow for drift control and accounts for error. This error analysis is available during operations to ensure quality control of all survey locations. Immediate QC is available at Control Point ties made throughout the daily operations. (A good average value is one Control Point for every mile of line surveyed, but this will vary based on client specifications.)

Post survey processing results are equal to, or better than RTK GPS surveys. The quality of the data from our B-PINS has been compared to RTK GPS on multiple jobs since 2006, and has been proven to be on the order of 0.3m to 0.5m per km traversed in real time, while the post processed data will be on the order of +/-0.25 m to 0.35m.