Method for well completions in horizontal wellbores in loosely consolidated formations

• US 5,415,227 A
• Filed: 11/15/1993
• Issued: 05/16/1995
• Est. Priority Date: 11/15/1993
• Status: Expired due to Fees

• Current Assignee: Mobil Oil Corporation (Exxon Mobil Corporation)
• Original Assignee: Mobil Oil Corporation (Exxon Mobil Corporation)
• Inventors: Jennings, Alfred R. Jr.
• Primary Examiner(s): Suchfield, George A.
• Application Number:
  US08/151,661
• Time in Patent Office: 547 Days
• Field of Search: 166/50, 166/227, 166/228, 166/236, 166/265, 166/278
• US Class Current: 166/278
• CPC Class Codes: E21B 43/08 Screens or liners expandable screens or liners E21B43/108
• CPC Class Codes: F24T 10/30 using underground reservoirs for accumulating working fluids or intermediate fluids
• CPC Class Codes: Y02E 10/10 Geothermal energy

Abstract

A method for completing a horizontal wellbore in a loosely consolidated or unconsolidated formation. To minimize collapse of the wellbore and minimize sand production while providing for greater flexibility in the placement of a sand control device in a horizontal wellbore, a slotted liner with a flexible sand control device affixed thereto is positioned into the horizontal wellbore. After positioning, the liner with sand control device attached, high permeability of openings within the liner is maintained when producing hydrocarbonaceous fluids from the formation.

Claims

1. A method for completing a horizontal well in a loosely consolidated or unconsolidated formation comprising:

a) positioning a slotted liner having one closed and one open end within a horizontal wellbore so as to cause the open end of said liner to be affixed to a lower end of a casing within the wellbore thereby fluidly communicating said liner and casing with the formation and surface; and

b) directing a flexible sand control device into said liner thereby causing a closed end of said device to be positioned adjacent to the liner'"'"'s closed end while the device'"'"'s open end is fluidly connected to a lower end of a production tube for producing substantially sand free hydrocarbonaceous fluids to the surface as the slotted liner prevents the formation from collapsing into the wellbore.

2. The method as recited in claim 1 where the sand control device contains at least two porous refractory sections separated by a flexible section.

3. The method as recited in claim 1 where the formation comprises a loosely consolidated sandstone formation.

4. The method as recited in claim 1 where after step b) an acid is flowed through said device and liner which acid is of a strength and composition sufficient to remove formation fines from said device and liner as required.

5. The method as recited in claim 1 where after step b) the formation is acidized by flowing an acid through said device and liner.