BPD (Barrels Per Day)

The horizontal section of a directionally drilled well, extending sideways through the target formation. Laterals can stretch several kilometres, requiring extended crew mobilisations and staged service scopes. Subcontractors should clarify lateral length upfront, as it directly affects equipment needs and job duration.

The formal handover point where ownership or responsibility for a measured quantity of oil, gas, or other product moves from one party to another — typically triggering billing, invoicing, or contractual obligations for subcontractors involved in metering, transport, or handling operations. Field service crews working custody transfer points must ensure measurements are accurate and fully documented, as discrepancies can directly affect client invoices and liability.

A global professional organisation that publishes technical standards, research, and best practices used across the oil and gas industry. Subcontractors may reference SPE papers and guidelines to meet operator technical requirements or bid on specialised work.

The phase of oil and gas well development after drilling is finished, encompassing the work required to prepare a well for production — including perforating, fracturing, and installing wellhead equipment. For subcontractors, completions represent a concentrated burst of high-demand field work where specialised crews, equipment, and services are mobilised under tight timelines.

A contractor management platform used by operators to verify that subcontractors meet safety, insurance, and compliance requirements before being allowed to work on sites. Maintaining ISNetworld compliance is essential for subcontractors working with major operators.

A rise in stored crude oil inventories, signalling weak demand or oversupply. This often triggers operators to slow production, which can delay or reduce field service work orders. Subcontractors should monitor stock build trends as an early indicator of project slowdowns.

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.