Disision method of water plugging for bottom-water oil reservoir well

Abstract

The invention provides a method work-out the bottom water cone advancing height, cone advancing radius and water cone volume according to the bottom water cone predicted model, researches the water submerging degree and residue oil latent capacity with the water cone shape, and the oil wells are classified according to the water containing rising rule, researches the change rule of the water capacity in oil; determines a bottom water treatment rule and solves flowing nine problems: 1. oil well type classification; 2. reservoir submerged degree estimation; 3. residue oil latent capacity analysis; 4. the selecting rule of bottom water treating method; 5. the selecting condition of bottom water treating well; 6. the decided rule of the isolating board in manual isolating board method; 7. creates the sifting standard and the assembly rule of blocking and sealing agent for isolating board; 8. creates the design method of the blocking agent quantity; 9. the effect estimation and the economic efficiency prediction of the bottom water treatment.

Description

Technical field:

[0001] The invention relates to a decision-making method for oilfield profile control and water shutoff, namely a decision-making method for water shutoff in reservoirs with bottom water, which provides an effective decision-making method for formulating and implementing the development plan of oilfields with bottom water. Background technique:

[0002] The most common phenomenon in bottom water reservoirs is bottom water coning. Bottom water coning means that in a reservoir with bottom water, before the reservoir is exploited, the water is located in the lower part of the reservoir and the oil is located in the upper part of the reservoir. If a production well is drilled in the oil-bearing part for oil production, a hemispherical potential distribution will be formed under the open section, and due to the influence of the vertical phase potential gradient, the oil-water contact surface will be deformed, and the potential gradient along the well axis will rea...