Wells – Processes – Specific pattern of plural wells
Patent
1979-12-05
1981-11-10
Leppink, James A.
Wells
Processes
Specific pattern of plural wells
166263, 166294, E21B 33138, E21B 4322, E21B 4330
Patent
active
042992842
ABSTRACT:
Disclosed is a method for conducting an enhanced oil recovery process comprising injecting an oil displacing fluid into an injection well and recovering petroleum displaced by the fluid from one or more spaced-apart production wells, by an improved method in which the sweep efficiency or horizontal conformance of the displacement process is increased. A fluid is injected into the producing well, which fluid has a viscosity not substantially greater than the viscosity of water at the conditions of injection, but which reacts with oil present in the formation, forming a viscous emulsion which restricts the flow of fluids through the portion of the formation contacted by the emulsion-forming fluid. As a result of this treatment, there is a reduction in tendency for the displaced and injected fluids to form cusps as they approach the production well, thereby failing to sweep substantial portions of the formation. The injected fluid contains one or more surfactants specifically tailored to form a viscous emulsion with the particular formation crude oil and formation water or brine exhibiting maximum viscosity at formation conditions. The viscous emulsion-forming fluid may be injected into all of a group of wells surrounding a central injection well in approximately equal amounts, for the purpose of improving sweep efficiency, or the treatment may be selectively applied to certain of the wells where the formation exhibits a preferred direction of permeability, or where for other reasons the pattern integrity is poor.
REFERENCES:
patent: 3074481 (1963-01-01), Habermann
patent: 3593787 (1971-07-01), Hoyt
patent: 3604506 (1971-09-01), Hoyt
patent: 3608635 (1971-09-01), Hoyt
patent: 3672448 (1972-06-01), Hoyt
patent: 4160480 (1979-07-01), Schievelbein et al.
patent: 4175618 (1979-11-01), Wu et al.
patent: 4192382 (1980-03-01), Schievelbein
Brown Alfred
Kudchadker Mohan V.
Varnon James E.
Whittington Lawrence E.
Kulason Robert A.
Leppink James A.
Park Jack H.
Ries Carl G.
Suchfield George A.
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