Integrated technology of equal fluidity oil displacement and profile control

Abstract

The invention discloses an integrated technology of equal fluidity oil displacement and profile control, and solves the problems that since oil layer profile control operation and oil field infusion process are conducted respectively, the profile control agent only has the blocking function without the oil displacement effect, and the impregnant only has the oil displacement function without the blocking effect. According to the method, a chemical agent is injected from a water well end equal fluidity three-plug for a plurality of rounds; the profile control agent is injected from an oil well end equal fluidity three-plug for a plurality of rounds to a high water content high infiltration channel of the corresponding water well; the high concentration plugs, the middle concentration plugs and the low concentration plugs of the two injection agents are soluble with water in the high infiltration zone between the two injection agents, so that a third agent, namely an efficient oil displacement agent, is combined through conversion, is extruded into a middle infiltration zone and a low infiltration zone, and is used for driving and replacing the water-containing raw oil in the middle infiltration band and the low infiltration band and increasing sweep volume and oil displacement efficiency. The integrated technology provided by the invention has better capacity of reducing high infiltration channel fluidity water controlling, improving liquid producing capacity of the middle infiltration layer and the low infiltration layer, increasing effective utilization and oil displacement efficiency of the injection agencies, and reducing total consumption, injection time and injection cost of the injection agencies, so that the purposes of systematic oil increase and cost reduction are generally realized.

Description

Technical field [0001] The invention involves the oily section process and the oil -driven injection process of the oilfield in the development of the oilfield. Background technique [0002] At present, during the injection of oilfield development, the oil layer sectional measures have no craftsmanship and three doses of the injecting of the oil field.The injection agent only has the effect of removing the oil, has no blocking effect, and does not consider the organic combination of deep dissection and injection processes.In any period of any time, the deep -section and injection process effects are not considering the efficiency; in addition, whether it is the removal technology of the deep part of the oil collection, or the thick oil thermal derivation,The high -lying layer advantage channel, but at the same time, may produce oil layer blockage and pollution, affecting the driving of the remaining oil in the high -lying reservoir, and no injecting deep -sectional technology is ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of oilfield development and injection, there is no consideration of process integration and three-agent combination of reservoir profile control measures and oilfield injection. Profile control and injection are operated separately, and the profile control agent only has a plugging effect and has no oil displacement effect. The injection agent only has the effect of oil displacement and has no plugging effect. The organic combination of deep profile control and injection technology has not been considered, and the problem of synergistic effects and benefit maximization has not been studied. For example, conventional profile control methods may be used in the process of water injection and chemical agent injection. In any period of time, the effect and benefit of deep profile control and injection technology are not considered synergistically; in addition, whether it is deep reservoir profile control technology or heavy oil thermal recovery profile control technology, existing profile control agents can effectively plug High-permeability reservoirs have dominant channels, but at the same time, oil reservoir plugging and pollution may occur, which will affect the displacement of remaining oil in high-permeability reservoirs, and the integrated technology of injection deep profile control is not considered