Fireflooding mining method for side water invaded heavy oil reservoir with stratigraphic dip angle

Abstract

The invention discloses a fireflooding mining method for a side water invaded heavy oil reservoir with a stratigraphic dip angle. According to the method, a gas injection well is arranged at the low position of a structure, a production well is arranged in the upward inclination direction, a live wire is impacted in the upward inclination direction from the low position, the gravity effect is overcome through fireflooding driving force and power provided by side water energy supplement, and oil extraction of the production well in the upward inclination direction is achieved. The problem that the adaptability of a conventional 'wind moving and fire receiving' fireflooding method from a high structure part of an edge water invaded oil reservoir is poor is solved, the single-well yield of the oil reservoir is improved, the development age limit is prolonged, and the recovery efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a fire flooding exploitation method with edge water intrusion into a heavy oil reservoir with formation dip. Background technique [0002] For heavy oil reservoirs with formation dips, the conventional fire flooding method is to deploy a row of gas injection wells at the structural high, and deploy several rows of production wells below the gas injection wells. The fire line will spread from the gas injection wells to the production wells. When the well is well, the gas injection well at the high position is closed, and the first row of production wells is converted into a gas injection well, and the fire line continues to spread to the next row of production wells. When the fire line reaches the second row of production, the previous row of gas injection wells is closed, and the second row of production wells Converted into gas injection wells, and so on, producti...

AI Technical Summary

Problems solved by technology

For heavy oil reservoirs invaded by edge water, due to the energy supplement of edge water, the pressure at the downdip part is higher than the pressure at the updip part. , there is a problem that the gas injection pressure is high and the fire line is difficult to expand to the lower part of the structure. When the combustion front advances slowly and is lower than the lower limit of the high-temperature combustion speed, it will turn into low-temperature oxidation or even fire extinguishing, resulting in the failure of the entire fire flooding project

[0003] At present, no effective fire flooding development method has been proposed for heavy oil reservoirs invaded by edge water with formation dip

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