What is a well completion in oil and gas?

Well completion concerns the work needed to prepare a drilled well for its intended service or production. The exact work depends on the well design and objective. Do not assume that every completion follows a horizontal drilling and hydraulic-fracturing sequence.

A drilled but uncompleted well has not yet completed the work needed to begin production. The DUC guide explains that distinction. Completion and production should remain separate stages even when their dates are close together.

Completion is a separate lifecycle stage from permitting, drilling, and production reporting.

A completion filing can connect a well identifier to dates, completed intervals, test information, and the type of work reported. Read each field in the context of the actual form. A field labeled as a test result should not be presented as a recurring monthly production volume.

The Texas RRC · Oil and gas forms lists Texas completion-related forms, while New Mexico OCD · Forms and report purposes identifies New Mexico's reporting forms. Form labels and the information captured are jurisdiction-specific; the existence of a “completion” category does not make every state's records identical.

A well can have a date when work occurred and a later date when the report was submitted or processed. Preserve those separate dates in a timeline. If the record is corrected, note which version provides the information you use.

Also check whether the filing concerns the original completion, a recompletion, or another change to the well. A later completion-related filing is not automatically another newly drilled well. Match the well and the reported operation before counting events.

These records may inform the same property review but should not be used interchangeably. A test result does not establish an owner distribution, and a payment record does not document the physical completion procedure.

Completion does not guarantee commercial success, a first-sale date, or a particular future decline pattern. It does not prove that every related regulatory requirement has been satisfied. The source filing supports the work it reports, within its scope.

For research, the next step is to locate dated production evidence at the appropriate reporting level. If that evidence is not yet available, say so. Do not create a production schedule by adding a generic interval to the completion date.

• Confirm the well identifier and reported operation.
• Distinguish event, submission, and revision dates.
• Keep tests separate from period production.
• Check the reporting entity before connecting completion to production.