Assertion: injection well | /r/CapableOf | choose in determined pattern
Facets:
value: often
type: TEMPORAL
value: from old production wells
type: LOCATION
value: carefully
type: MANNER
Source sentences:
text: Such methods require the use of injection wells (often chosen from old production wells in a carefully determined pattern), and are used when facing problems with reservoir pressure depletion, high oil viscosity, or can even be employed early in a field's life.