Single well injection and production system

Patent · Tue May 14 04:00:00 EDT 1991

OSTI ID:5118644

Duerksen, J H

This patent describes a method for multiple string fluid injection and production of viscous hydrocarbons from a single wellbore having a casing traversing a subtereanean formation. It comprises: providing lower perforations to establish lower communication point between a lower portion of the formation and the inside of the casing; providing upper perforations to establish upper communication point between an upper portion of the formation and the inside of the casing; setting a single string packer within the casing above the lower point of communication to establish a production zone below the single string packer and a thermal zone above the single string packer; setting a dual-string packer above the upper point of communication, the dual-string packer defining the upper boundary of the thermal zone; introducing a first tubing string into the wellboro; terminating the first tubing string at the production zone; introducing a second tubing string paralleling the first tubing string into the wellboro; terminating the second tubing string in the lower portion of the thermal zone; and flowing a drive fluid into the second tubing string and through the upper perforations; and flowing a produced fluid from the production zone through the first tubing string for the recovery.

• Assignee: Chevron Research Co., San Francisco, CA (USA)
• Patent Number(s): US 5014787; A
• Application Number: PPN: US 7-394687
• OSTI ID: 5118644
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
FLUID INJECTION PROCESSES
HYDROCARBONS
OIL WELLS
ORGANIC COMPOUNDS
PERFORATION
PRODUCTION
WELLS