Cavern Infrastructure

The real-time technique of guiding a drill bit through a target formation using geological data. Subcontractors supporting drilling operations may be called in on short notice as geosteering decisions change well paths. Expect scope adjustments and rapid crew or equipment mobilisation when geosteering is active.

The process of connecting a power generation asset to the public electrical grid. For subcontractors, it triggers specific commissioning milestones, inspections, and sign-offs. Delays in interconnection approval can directly impact project timelines and invoicing.

The segment of the oil and gas industry involved in exploration and production (E&P). Includes drilling, completions, and well operations.

The initial release of fluids, sand, and gases from a wellbore after hydraulic fracturing, which requires specialised crews and equipment on-site to manage, separate, and dispose of the returned materials safely. For field service subcontractors, flowback operations represent a distinct scope of work with dedicated mobilisation requirements and often involve tight scheduling windows tied to the operator's completion timeline.

Operations performed on an existing well to restore, maintain, or improve production. Includes activities like recompletions, artificial lift installation, and remedial cementing.

The segment of the oil and gas industry involved in processing, storing, and transporting oil, gas, and NGLs. Includes pipelines, gathering systems, and processing plants.

What Is an AFE in Oil and Gas and How Does It Affect Subcontractor Payments?

An AFE (Authorization for Expenditure) controls every dollar spent on an oilfield project. Learn how it affects your billing, change orders, and cash flow as a subcontractor.