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Temperature-resistant and salt-resistant filled flow-regulating particles and preparation method thereof

A temperature-resistant, salt-resistant, and flow-regulating technology, which is applied in the direction of chemical instruments and methods, and drilling compositions, can solve problems that cannot be used to solve the problem of water channeling in reservoirs, and achieve strong guiding significance, simple construction, and high density low effect

Active Publication Date: 2019-12-03
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the volume-expanding particles are used to block steam channeling, they cannot be used to solve the problem of water channeling in the development of high-temperature, high-salt reservoirs with harsh conditions.

Method used

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  • Temperature-resistant and salt-resistant filled flow-regulating particles and preparation method thereof

Examples

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preparation example Construction

[0044] According to another aspect of the present invention, the present invention also provides a method for preparing the above-mentioned temperature-resistant and salt-resistant filled flow-regulating particles, including the following steps:

[0045] 1) According to the above ratio, add water and bentonite into the mixing tank, after mixing evenly, add calcium hydroxide, and stir thoroughly;

[0046] 2) According to the above ratio, add acrylamide, heat to 50-70°C and fill with nitrogen for protection;

[0047] 3) According to the above ratio, add N, N-methylenebisacrylamide and polyurethane, stir and heat to 110-130°C, then add potassium persulfate, and keep the temperature for 1-5 hours;

[0048] 4) According to the above ratio, add solvent oil and petroleum resin to be Ni / γ-Al 2 o 3 The product catalyzed by the catalyst is kept at a constant temperature of 180-240°C and stirred until it is evenly mixed;

[0049] 5) Dried and crushed until the particle size does not e...

Embodiment 1

[0054] The composition of the temperature-resistant and salt-resistant filled flow regulating particles of this embodiment is: D40 solvent oil and petroleum resin pass through Ni / γ-Al 2 o 3 75 parts (weight) of the product obtained after catalyst catalysis, 35 parts of bentonite, 7 parts of calcium hydroxide, 0.3 part of N, N-methylenebisacrylamide, 35 parts of acrylamide, 0.3 part of potassium persulfate, 7 parts of polyurethane, and 40 parts of water. Among them, the ratio of D40 solvent oil to petroleum resin is 55 parts: 20 parts, using 8 parts Ni / γ-Al 2 o 3 The catalyst catalyzes.

[0055] The preparation method is:

[0056] First add water and bentonite to the mixing tank, then add calcium hydroxide, stir well and add acrylamide, heat to 60°C and fill with nitrogen protection, N,N-methylenebisacrylamide, polyurethane, stir and heat to 120°C Finally, potassium persulfate was added, and the temperature was maintained for 2 hours, and then D40 solvent oil and petroleum...

Embodiment 2-5

[0058] The composition of the temperature-resistant and salt-resistant filled flow-regulating particles of Examples 2-5 is shown in Table 1. In embodiment 2 and 3, the ratio of D40 solvent oil and petroleum resin is 50 parts: 15 parts, adopts 5 parts of Ni / γ-Al 2 o 3 The catalyst catalyzes. In embodiment 4 and 5, the ratio of D40 solvent oil and petroleum resin is 60 parts: 25 parts, adopts 10 parts of Ni / γ-Al 2 o 3 The catalyst catalyzes. The preparation method of the temperature-resistant and salt-resistant filled flow-regulating particles of Examples 2-5 is the same as that of Example 1.

[0059] The product of the present invention is simulated formation temperature 130 ℃, salinity 20 * 10 4 mg / L oil reservoir conditions, the main performance parameters of the temperature-resistant and salt-resistant filled flow-regulating particles of each embodiment are shown in Table 2.

[0060] The content of each component of the temperature-resistant and salt-resistant filled f...

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Abstract

The invention relates to a temperature-resistant salt-resistant filled flow regulation particle which comprises the following components in parts by weight: 65-85 parts of a product prepared by catalyzing solvent oil and petroleum resin through a catalyst Ni / gamma-Al2O3, 20-50 parts of bentonite, 5-10 parts of calcium hydroxide, 0.1-0.5 part of N,N-methylenebis acrylamide, 20-50 parts of acrylamide, 0.1-0.5 part of potassium persulfate, 5-10 parts of polyurethane and 30-50 parts of water. The product has the advantages of simple construction, high efficiency, low cost, low density, high strength, low water swelling rate, excellent heat resistance and the like, is capable of realizing fixed-point storage of deep petroleum reservoir and is suitable for fractured-vuggy reservoir.

Description

technical field [0001] The invention relates to an oilfield chemical treatment agent, in particular to a temperature-resistant and salt-resistant filled flow regulating particle and a preparation method thereof. Background technique [0002] At present, the treatment of water flooding failure wells in fractured-vuggy reservoirs at home and abroad is in the exploratory stage, and the relevant chemicals are poor in temperature and salt resistance. [0003] For example, the Chinese National Invention Patent (CN 105065444 A) discloses a high-temperature volume expansion particle plugging agent, in which the mass ratio of each raw material is: 20-50% of acrylamide, 20-50% of acrylic acid, 1-50% of sodium hydroxide 15%, Neigang Granules 2-10%, Ammonium Persulfate 0.1-0.5%, Sodium Bisulfite 0.05%-0.25%, N,N-Methylenebisacrylamide 0.1-0.5%, Methyl Lauryl acrylate is 1 to 5%, and the rest is water. The high-temperature volume-expanding particle plugging agent has a flexible outer l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/512
CPCC09K8/512
Inventor 王雷吴文明何龙焦保雷钱真甄恩龙巫光胜王瑞曾文广张建军何晓庆柏森王敏健曹畅
Owner CHINA PETROLEUM & CHEM CORP
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