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A high-strength, fully degradable technology, applied in the direction of mining fluids, braids, fiber chemical characteristics, etc., can solve the problems of low compressive strength, poor solubility, low degradation rate, etc., and achieve the effect of shortening the fracturing cycle
Active Publication Date: 2021-08-03
SICHUAN JIEBEITONG ENERGY TECH CO LTD
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[0004] The purpose of the present invention is to provide a fully degradable high-strength knot temporary plugging for the problems of poor solubility, low degradation rate and low compressive strength in the existing temporary plugging materials.
Method used
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Embodiment 1
[0027] A preparation method for fully degradable high-strength knot temporary plugging:
[0028] First, prepare polymer A: add 200 grams of distilled water to a 500 milliliter reaction bottle, add 30 grams of triethylene glycol divinyl ether, 15 grams of butanediol, 7 grams of 4-hydroxybutyl vinyl ether, 2 Gram 2-acrylamide-2-methylpropanesulfonic acid (AMPS), stirring and dissolving, obtains solution A, for subsequent use; The ammonium persulfate that takes 0.2 gram is dissolved in 25 grams of distilled water, dissolves, and obtains solution B, for subsequent use; Add solution A into the reaction vessel, keep warm in a water bath at 50°C, and stir; slowly add solution B dropwise into the reaction vessel, and the time is controlled within 1 hour to complete the dropwise addition; after dropping, continue to keep warm at 50°C for 8-10 hours; Drying yields Polymer A.
[0029] Next, 2g of plasticizer epoxidized soybean oil and 2g of modified surfactant sodium dodecylsulfonate ar...
Embodiment 2
[0031] A preparation method for fully degradable high-strength knot temporary plugging:
[0032] First, prepare polymer A: add 200 grams of distilled water to a 500 milliliter reaction bottle, add 35 grams of triethylene glycol divinyl ether, 5 grams of butanediol, 10 grams of 4-hydroxybutyl vinyl ether, 3 Gram 2-acrylamide-2-methylpropanesulfonic acid (AMPS), stirring and dissolving, obtain solution A, for subsequent use; The ammonium persulfate that takes 0.3 gram is dissolved in 25 gram of distilled waters, dissolves, obtains solution B, for subsequent use; Add the prepared solution A into the reaction container, keep warm at 50°C in a water bath, and stir; slowly add solution B dropwise into the reaction container, and the time is controlled within 1 hour to complete the dropwise addition; -10h; dry to obtain polymer A.
[0033] Secondly, 2g of plasticizer epoxy soybean oil and 2g of modified surfactant sodium dodecylsulfonate are added to polymer A, placed in a mixer for...
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Abstract
The invention discloses a fully-degradable high-strength rope knot temporary plug. The fully-degradable high-strength rope knot temporary plug is prepared by the following steps of blending a polymer A, a plasticizer and sodium dodecyl sulfate, and sequentially drying, melting, spinning, drying, weaving and cutting, wherein the preparation method of the polymer A comprises the following steps of S1, dissolving triethylene glycol divinyl ether, butanediol, 4-hydroxybutyl vinyl ether and 2-acrylamide-2-methylpropanesulfonic acid in distilled water to obtain a solution A; S2, dissolving ammonium persulfate in the other part of distilled water to obtain a solution B; and S3, adding the solution A into a reaction container, keeping the temperature at 50 DEG C in a water bath, stirring, then slowly dropwise adding the solution B into the solution A within 1 hour, and after dropwise adding, continuously keeping the temperature at 50 DEG C to react for 8-10 hours, so as to obtain a polymer A. The temporary plug can replace a horizontal well bridge plug and all temporary plugging agents, and the material of the temporary plug can be completely degraded into carbon dioxide and water.
Description
technical field [0001] The invention relates to the technical field of oil field stimulation, in particular to a fully degradable high-strength knot temporary plug. Background technique [0002] At present, volume fracturing is mainly adopted for the stimulation of low-permeability oil and gas reservoirs at home and abroad. The reservoir matrix is "broken" by fracturing to form a network of fractures, so that the contact area between the fracture wall and the reservoir matrix is the largest, so that the oil and gas in the matrix The seepage distance to the fracture is the shortest, and the seepage resistance of the matrix fluid to the fracture is the smallest, which greatly improves the overall seepage capacity of the reservoir and realizes the "three-dimensional transformation" of the reservoir in the three-dimensional directions of length, width and height. [0003] At present, the volume fracturing of horizontal wells is performed in stages with packers, and the packe...
Claims
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