Method for implementing oil well deep part selective water plugging by utilizing waste polystyrene foam plastic

A technology of discarding polystyrene and foam plastics, which is applied in wellbore/well parts, chemical instruments and methods, earthwork drilling and production, etc. It can solve the problems of selective water shutoff in the deep part of the oil layer and the inability to reach the deep part of the oil layer, etc., and achieve cost The effect of low, strong selectivity and wide source of raw materials
CN104453771AActive Publication Date: 2015-03-25PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2015-03-25

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Abstract

The invention relates to a method for implementing oil well deep part selective water plugging by utilizing waste polystyrene foam plastic. The method comprises the following steps: preparing a plugging agent solution : adding 100 parts by weight of waste polystyrene foam plastic to 5-15 parts by weight of an organic solvent, and stirring and dissolving at 40-60 DEG C to obtain the plugging agent solution; or further adding 10-200 parts by weight of diesel, stirring and mixing to obtain the plugging agent solution, wherein the organic solvent is selected from one or more of methylbenzene, xylene, methyl acetate, ethyl acetate and acetone; adding the plugging agent solution to diluted crude oil and / or diesel as carrier fluid to obtain plugging agent oil liquid, and annularly extruding the plugging agent oil liquid from an oil jacket to the stratum; jacking the plugging agent oil liquid into the deep part of the stratum by utilizing displacing liquid; closing the oil well for 1-2 days, and then opening the oil well normally for production. According to the method for implementing the oil well deep part selective water plugging by utilizing the waste polystyrene foam plastic, the method for implementing oil well deep part selective water plugging is realized by utilizing waste polystyrene foam plastic; effluent can be effectively controlled at a water layer, and no pollution and damage to an oil layer are realized.
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Description

technical field

[0001] The invention relates to a method for selectively shutting off water in the deep part of an oil well, in particular to a method for selectively shutting down water in the deep part of an oil well by using waste polystyrene foam plastics, and belongs to the field of water shutoff in oil fields. Background technique

[0002] Oil well plugging refers to controlling the production of water from oil wells, with the purpose of improving the production efficiency of oil wells. Chemical water plugging is a method of injecting chemical plugging agent into the water outlet layer on the ground, and using the product of physical and chemical reactions between the plugging agent and the oil layer to plug the oil layer. Oil-soluble resin water plugging technology is based on the principle that oil-soluble resin can be dissolved in crude oil, but when it meets water, it will form agglomerated substances to block, so as to achieve the purpose of water blocking without...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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