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A kind of green fully soluble high-strength crevice pressurizing agent and its preparation method

An internal pressurization, high-strength technology, used in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve the problems of poor high temperature resistance, low compressive strength, poor solubility, etc. High strength, low formation damage, and slow degradation

Active Publication Date: 2021-02-19
SICHUAN JIEBEITONG ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a green soluble high-strength in-seam supercharging agent for the problems of poor solubility, low degradation rate, low compressive strength, and poor high-temperature stability of existing supercharging agents.

Method used

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  • A kind of green fully soluble high-strength crevice pressurizing agent and its preparation method
  • A kind of green fully soluble high-strength crevice pressurizing agent and its preparation method
  • A kind of green fully soluble high-strength crevice pressurizing agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 200 grams of distilled water to a 500 ml reaction bottle, add 30 grams of 10-hydroxy-2-decenoic acid, 8 grams of N-vinylpyrrolidone, 1.5 grams of cetyl acrylate, 2 grams of 2-acrylamide-2-methyl Alkylpropanesulfonic acid (AMPS), stirring and dissolving, obtains solution A, for subsequent use; The ammonium persulfate of taking 0.25 grams is dissolved in 25 grams of distilled water, dissolves, and obtains solution B, for subsequent use; Add solution A prepared in the reactor , keep warm in a water bath at 50°C, and stir; slowly add solution B to the reactor dropwise, and the time is controlled within 1h to complete the dropwise addition; after dropping, continue to keep warm at 50°C for 8-10h; vacuum the obtained product Dried to obtain a yellow powder, which is a green fully soluble high-strength crevice pressurizer. The supercharging agent synthesized by this method is suitable for oil and gas well fracturing operation above 90°C.

Embodiment 2

[0032] Add 200 grams of distilled water to a 500 ml reaction bottle, add 35 grams of 10-hydroxy-2-decenoic acid, 5 grams of N-vinylpyrrolidone, 2 grams of hexadecyl acrylate, 3 grams of 2-acrylamide-2-methyl Alkylpropanesulfonic acid (AMPS), stirring and dissolving, obtains solution A, for subsequent use; The ammonium persulfate of taking 0.3 gram is dissolved in 25 grams of distilled water, dissolves, and obtains solution B, for subsequent use; Add solution A prepared in the reactor , keep warm in a water bath at 50°C, and stir; slowly add solution B to the reactor dropwise, and the time is controlled within 1h to complete the dropwise addition; after dropping, continue to keep warm at 50°C for 8-10h; vacuum the obtained product Dried to obtain a yellow powder, which is a green fully soluble high-strength crevice pressurizer. The supercharging agent synthesized by this method is suitable for oil and gas well fracturing operation above 90°C.

Embodiment 3

[0034] Add the powder supercharger prepared in Example 1 into slippery water, and the specific formula is as follows: 0.1% drag reducer+0.1% drainage aid+0.2% clay stabilizer+5% powder supercharger. Wherein the percentage content is a mass percentage.

[0035] The experiment was carried out at 120°C, and the performance test results of the pressurizer are shown in Table 1.

[0036] Table 1, embodiment 1 supercharging agent performance test result

[0037] project index Degradation time, h 22 Degradation rate,% 100 Temporary blocking rate, % 98 Compressive strength, MPa 72 Core permeability recovery rate, % 97 Surface tension of gel breaking solution after dissolution, mN / m 24.4 Anti-expansion rate of gel breaking solution after dissolving, % 87.9

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Abstract

The invention discloses a green fully soluble high-strength crevice booster, which is composed of raw materials 10-hydroxy-2-decenoic acid, N-vinylpyrrolidone, cetyl acrylate, 2-acrylamide ‑2‑Methylpropanesulfonic acid is produced by polymerization initiated by an initiator. The steps are as follows: S1, 10-hydroxy-2-decenoic acid, N-vinylpyrrolidone, acrylate and 2-acrylamide-2-methylpropanesulfonic acid are dissolved in distilled water to obtain solution A; S2, persulfuric acid Dissolve ammonium in another portion of distilled water to obtain solution B; S3, add solution A to the reaction vessel, keep warm in a water bath at 50°C, and stir, then slowly add solution B to solution A dropwise, and the dropwise addition is completed within 1 hour After the dropwise addition, continue to keep warm at 50°C for 8-10 hours, and finally vacuum-dry to obtain a yellow powder, which is a green fully soluble high-strength interstitial supercharger. The pressurizing agent of the present invention is completely dissolved in fracturing fluid environments at different temperatures, has no residual solid, and has a degradation rate of 100%.

Description

technical field [0001] The invention relates to the technical field of oil field stimulation, in particular to a green fully soluble high-strength crevice booster and a preparation method thereof. Background technique [0002] my country's low-permeability oilfields are rich in petroleum geological reserves, and their resources account for about 30% of the country's total petroleum resources. Among the proven reserves, low-permeability oil reservoirs account for more than two-thirds of the country's reserves, and the development potential is huge. Although most low-permeability reservoirs have a large increase in production after fracturing, the production is still not high. In recent years, major oilfields have adopted multi-fracture technology or fracture diversion technology in the fracturing operation to intensify efforts to stimulate low-permeability reservoirs and maximize reservoir production. Steering fracturing technology uses chemical materials to deviate and dive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508C09K8/80C08F220/04C08F226/10C08F220/18C08F220/58
CPCC08F220/04C09K8/5083C09K8/80C08F226/10C08F220/1818C08F220/585
Inventor 曾斌徐太平周京伟李栓
Owner SICHUAN JIEBEITONG ENERGY TECH CO LTD
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