Why huff-and-puff steam injection has given good results (in Maracaibo)

Journal Article · Sat Feb 01 04:00:00 EST 1975 · Pet. Int.; (United States)

OSTI ID:5116013

Huff-and-puff steam injection on a large scale has led to new methods of well completionin Maracaibo, Venez. Along the Bolivar Coast, the well depths are 1,000 to 4,500 ft down to the producing formations; the viscositites of the oil are from 100 to 50,000 cp at standard conditions; and the crude is from 10/sup 0/ to 15/sup 0/ API. The thickness of the producing intervals (70% sand and 30% shale) is from 200 to 1,200 ft. In general, there is a regional subsidence; the sands, although with permeabilities of from one to several darcies, are poorly consolidated. The typical well completion for the heavy oil in the region contains a slotted casing cemented at the top of the post-Eocene sands, gravel packed in a hole enlarged to 13 to 15 in. High pressure steam requires insulation and one or more expansion joints. Completions allow for selective steaming of different formations. Different well completion assemblies are illustrated.

• Research Organization: Cie Shell Venezuela
• OSTI ID: 5116013
• Journal Information: Pet. Int.; (United States), Journal Name: Pet. Int.; (United States) Vol. 33:2; ISSN PTRIB
• Country of Publication: United States
• Language: Spanish

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
DEVELOPING COUNTRIES
DIMENSIONS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUID INJECTION PROCESSES
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
LATIN AMERICA
MINERAL RESOURCES
OIL FIELDS
OIL WELLS
PERMEABILITY
PETROLEUM
PETROLEUM DEPOSITS
RECOVERY
RESOURCES
SOUTH AMERICA
STEAM INJECTION
STIMULATION
THERMAL RECOVERY
THICKNESS
VENEZUELA
VISCOSITY
WELL COMPLETION
WELL STIMULATION
WELLS