EP 0886035 B1 20040908 - Method of enhanced recovery of hydrocarbons in an underground formation
Title (en)
Method of enhanced recovery of hydrocarbons in an underground formation
Title (de)
Sekundärverfahren zur Gewinnung von Kohlenwasserstoffen aus unterirdschen Lagern
Title (fr)
Procédé de récupération assistée de fluids pétroliers dans un gisement souterrain
Publication
Application
Priority
FR 9707611 A 19970617
Abstract (en)
[origin: EP0886035A2] The displacement of oil from a subterranean seam comprises a stage of injection, under pressure, by one or more injection wells successively with plugs of fluid to displace the hydrocarbons in the formation, and a recovery stage, by one or more production wells, of the displaced hydrocarbons. The injection stage comprises the successive injection of plugs of moist fluid which have been saturated with a gas under pressure and gaseous plugs to scavenge the more permeable zones. The production stage comprises the relaxation of the pressure in the formation so as to generate, in-situ, gas bubbles by nucleation in the pores of the less permeable zone, and to free hydrocarbons to the more permeable zones where they are scavenged by the gaseous plugs.
IPC 1-7
IPC 8 full level
E21B 43/16 (2006.01); E21B 43/18 (2006.01)
CPC (source: EP US)
E21B 43/16 (2013.01 - EP US); E21B 43/164 (2013.01 - EP US); E21B 43/18 (2013.01 - EP US)
Designated contracting state (EPC)
FR GB NL
DOCDB simple family (publication)
EP 0886035 A2 19981223; EP 0886035 A3 20010926; EP 0886035 B1 20040908; CA 2239759 A1 19981217; CA 2239759 C 20080129; FR 2764632 A1 19981218; FR 2764632 B1 20000324; NO 323039 B1 20061227; NO 982769 D0 19980616; NO 982769 L 19981218; US 6105672 A 20000822
DOCDB simple family (application)
EP 98401342 A 19980605; CA 2239759 A 19980616; FR 9707611 A 19970617; NO 982769 A 19980616; US 9849798 A 19980617