Office of Conservation

Engineering Administrative>> Permits Section>>

Downhole Combination

The term "Downhole Combination" refers to a well producing more than one sand simultaneously. An application is submitted in letter form which describes the circumstances of the application with attachments. 

An application is reviewed for and must contain the following criteria:

  • An explanation of a need for the procedure.

  • A discussion of the drive mechanisms and pressure history of the sands in which commingling is proposed.

  • Engineering Data:

    • The reservoir must be wholly contained under one lease.

      • otherwise, the written concurrence of all the affected parties is required with the application.

      • If a mineral owner is the State of Louisiana, the State Mineral Board's written approval is required.

    • Field Name

    • Well Name and Number

    • Well Serial Number

    • Location description:

      • surface and bottom hole

    • Current completion date, sand and perforations

    • Current well status

  • Well Bore Sketch showing the proposed well configuration, sands and perforations.

  • Well logs showing top and base of sands to be commingled.

    • a five-inch log is preferred. 

  • Structure maps of the reservoirs involved showing the:

    • Lease boundaries identified

    • Reservoir productive limits

  • A statement of whether the subject sands are unitized or not

    • If the subject sands are unitized, include:

      • Order information that unitized the sands and its effective date

      • Order information that authorizes the downhole combination of the subject sands and its effective date.

  • A work permit (form DM4R)

  • The rules of Statewide Order 29-E are applicable unless well spacing is set by Order in a Commissioner's Unit.

    • (Click HERE to access the rules and search for 29-E)