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IndustryGlossary Term

Acre-Feet

A volume measurement equal to one acre of surface area filled one foot deep, roughly 1,233 cubic metres. Common in water management contracts for tailings ponds, frac water storage, and site remediation. Subcontractors may be scoped and billed based on acre-feet of material moved or treated.

Related Terms

Corrective Maintenance

Industry

Repair work performed after equipment has already failed or broken down. For subcontractors, it often means urgent mobilisation and unplanned labour costs. Scope can expand quickly, so clear change-order procedures are essential.

Development Sanction

Industry

The formal approval by an operator or project owner to proceed with full-scale field development. For subcontractors, it signals that major contracts, mobilisation, and field work are imminent. It marks the point where scopes of work move from planning to active procurement.

2d/3d Seismic Survey

Industry

A geophysical mapping operation that uses sound waves to image underground formations before drilling begins. Subcontractors are hired to deploy geophones, vibroseis trucks, or marine streamers across large survey grids. Work is often remote and time-sensitive, with crews mobilising quickly once permits are secured.

Maintenance Capital

Industry

Funds spent to keep existing equipment and infrastructure operational rather than expanding capacity. For subcontractors, client maintenance capital budgets directly drive demand for inspection, repair, and servicing contracts. Tighter maintenance capital spending often signals reduced field work volumes ahead.

Membrane Separation

Industry

A filtration process that uses semi-permeable membranes to separate gases or liquids by molecular size or pressure. Common in natural gas processing and produced water treatment on field sites. Subcontractors may install, inspect, or maintain membrane units as part of facility service scopes.

Shipper Commitment

Industry

A contractual obligation by a producer or operator to move a set volume of product through a pipeline over a defined period. These agreements often drive project timelines and mobilisation schedules for field service subcontractors. Steady shipper commitments signal stable, longer-term work opportunities in a given region.

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