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  • Hatfield-3202: Monitoring pipeline stability in discontinuous permafrost

 

Monitoring pipeline stability in discontinuous permafrost

 

 

 

Challenge ID:

HCP-3202

Originator:

Onshore: Hatfield

Title:

Monitoring pipeline stability in discontinuous permafrost.

 

Theme:

ON 3.2: Subsidence monitoring - Infrastructure monitoring

Consortium Lead:

C-CORE

Interviewed Company:

C-CORE

Geography:

ON.REG.03 - Canada

Challenge Description

What is not possible / not adequately addressed at present?

There is a need to improve methods for monitoring / assessing / determining the stresses on pipelines due to discontinuous permafrost. Issues are as follows: ground movement stresses during freeze-thaw cycles in non-permafrost areas is distributed along the length of the pipeline; and, in discontinuous permafrost there is an additional complication at the boundary of the permafrost (stable ground) and non-permafrost (moving ground).

What effect does this challenge have on operations?

The impact during the design phase is on the safety margin associated with the pipeline thickness required (i.e. capital cost implications). The operation risk is pipeline failure over time, exposed pipeline at surface.

Thematic information requirements:

Surface motion (horizontal and vertical)

Terrain information

What do you currently do to address this challenge? 

How is this challenge conventionally addressed?

Geotechnical surveys during route planning and updated surveys during operations which includes inline PIG surveys, aerial surveys, field surveys.

What kind of solutions do you envisage could address this challenge?

Historical analysis of ground movement and permafrost maps for trends (typically over two seasons of ground movement and permafrost maps to assess current status).

What is your view on the capability of technology to meet this need?

Are you currently using EO tech? If not, why not?

Most work is currently done with modeling and is based on low-resolution mapping.

Challenge Classification

Impact on Lifecycle (0=none, 4=high):

Climate / Topography / Urgency:

Pre-license:

3

Climate class:

Polar

Exploration:

2

Topographic class:

Snow / Ice

Development:

3

Seasonal variations:

Colder weather focus

Production:

4

Impact area:

Cost reduction

Decommissioning:

0

Technology urgency:

2 - Short term (2-5 years)

Challenge Information Requirements

Update frequency:

Monthly

Data currently used:

LiDAR

Air photos

High resolution imagery

InSAR

Spatial resolution:

License

Thematic accuracy:

Not specific

Required formats:

Not Specific

Timeliness (Vintage):

Within a week

Geographic extents:

License

Existing standards:

None


 

 

 

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