The pipelines will be flushed to remove hydrocarbons and they will be filled with water prior to being abandoned. Consistent with the approved Sable Development Plan and with industry practices, pipelines will be left in place, as this method has been demonstrated to cause less environmental impact and disruption to established sealife. However, portions of the pipelines that would present a hazard to fisheries or other users of the sea will either be mitigated or removed.
Illustration of concrete mattresses over a pipeline
The first major scope of decommissioning work is plugging and abandoning Sable’s wells, also referred to as "well P&A". Sable has 22 wells drilled in water depths that range from 22 to 76 metres that will need to be properly plugged and abandoned.
Map of 26” gathering pipeline and interfield pipelines
The pipelines will be flushed to remove hydrocarbons. Following this, grout (a low strength concrete slurry) will be pumped into the sections of the pipelines to isolate water crossings and reinforce areas of the pipeline below roadways.
Consistent with the approved Sable Development Plan and with industry practices, pipelines will be left in place. The above-ground structures will be removed and the areas will be returned to a natural state.
Natural Gas Liquids (NGL) 8" Pipeline is approximately 64 km in length