The separation between infrastructure processes and production
processes has been introduced in earlier LCA works.
However, the separation is not always clear. Thus, one might
assume for instance the construction of a borehole as an infrastructure
process because it is somehow similar to the construction
of buildings or streets. On the other hand, drilling is
a continuous action on oil and gas fields. Therefore, it would
also be reasonable to see this as a part of the production process.
With this respect, the ecoinvent classification of dataset to
infrastructure and to operation is somewhat arbitrary