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A kind of suspending gel particle blockage regulating agent and its application

A technology of gel particles and plugging agent, which is applied in the fields of production fluid, wellbore/well components, drilling composition, etc., can solve the problems of low effective components, poor environmental protection, dangerous operation, etc., and achieves simple preparation process, It is not easy to break and break, and the effect of less raw material consumption

Active Publication Date: 2017-12-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through indoor research, it is found that the resin particles have a plugging agent with a maximum temperature resistance of only 85°C, and the long-term stability is poor, which has high requirements on the physical properties of the reservoir. Accumulation near the wellbore, resulting in problems such as inability to inject into the formation
[0006] CN 101200513A discloses a flexible polymer particle and its preparation method. Although the flexible polymer particle has good temperature resistance, the raw material has flammable and toxic properties, poor environmental protection, severe heat release during the preparation process, dangerous operation, and difficult polymerization process. Without control, the molecular weight distribution of the polymerization product is wide and the active ingredients are low, which is not suitable for mass production and cannot effectively meet the needs of large-dose profile control and water shutoff in oil fields

Method used

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  • A kind of suspending gel particle blockage regulating agent and its application
  • A kind of suspending gel particle blockage regulating agent and its application
  • A kind of suspending gel particle blockage regulating agent and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a suspended gel particle plugging regulator.

[0034] 1. The raw materials for preparing gel particles are:

[0035] Diallyl phthalate: 20 parts by weight;

[0036] Vinylpyrrolidone: 60 parts by weight;

[0037] Dioctyl phthalate: 19.2 parts by weight.

[0038] Benzoyl peroxide: 0.8 parts by weight

[0039] 2. The raw materials for preparing suspension gel particle plugging agent are:

[0040] Gel particles: 5 parts by weight;

[0041] Polyacrylamide: 5 parts by weight;

[0042] 2-acrylamido-2-methylpropanesulfonic acid sodium salt: 2 parts by weight;

[0043] Potassium nitrate: 10 parts by weight;

[0044] Water: 78 parts by weight.

[0045] 3. The suspended gel particle plugging agent is prepared by the following steps:

[0046] Add diallyl phthalate, vinylpyrrolidone, and dioctyl phthalate to the mixing tank in turn, mix well at 60°C, then add benzoyl peroxide to obtain a gel, squeeze the gel into the granulator, dried, ground and g...

Embodiment 2

[0049] This embodiment provides a suspended gel particle plugging regulator.

[0050] 1. The raw materials for preparing gel particles are:

[0051] Diallyl malonate: 40 parts by weight;

[0052] 3-acetylamino-4-vinylpyridine: 40 parts by weight;

[0053] Dibutyl phthalate: 19 parts by weight.

[0054] Benzoyl peroxide: 1 part by weight

[0055] 2. The raw materials for preparing suspension gel particle plugging agent are:

[0056] Gel particles: 4 parts by weight;

[0057] Polymethacrylamide: 6 parts by weight;

[0058] Methylene bisacrylamide: 1.5 parts by weight;

[0059] Potassium bromide: 12 parts by weight;

[0060] Water: 76.5 parts by weight.

[0061] 3. The suspended gel particle plugging agent is prepared by the following steps:

[0062] Add diethyl diallylmalonate, 3-acetamido-4-vinylpyridine, and dibutyl phthalate in turn to the stirring tank, and after mixing evenly at 70°C, add the initiator benzoyl peroxide, That is, the gel is obtained, and the gel is...

Embodiment 3

[0065] This example provides a suspended gel particle plugging regulator and its performance evaluation experiment.

[0066] 1. The raw materials for preparing gel particles are:

[0067] Diallyl phthalate: 30 parts by weight;

[0068] 3-acetylamino-4-vinylpyridine: 58 parts by weight;

[0069] Dioctyl phthalate: 10 parts by weight.

[0070] Benzoyl peroxide: 2 parts by weight

[0071] 2. The raw materials for preparing suspension gel particle plugging agent are:

[0072] Gel particles: 5 parts by weight;

[0073] Polyacrylamide: 5 parts by weight;

[0074] Methylene bisacrylamide: 2 parts by weight;

[0075] Potassium nitrate: 13 parts by weight;

[0076] Water: 75 parts by weight.

[0077] 3. The suspended gel particle plugging agent is prepared by the following steps:

[0078] Add diallyl phthalate, 3-acetamido-4-vinylpyridine, and dioctyl phthalate to the mixing tank in sequence, and after mixing evenly at 65°C, add the initiator benzoyl peroxide to obtain Gel bo...

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PUM

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Abstract

The invention provides a suspended gel particle plugging agent and its application. In terms of weight percentage, the raw materials of the suspended gel particle plugging agent include: 2-10wt% polymer, 0.5-3wt% crosslinking agent, 5 ‑20wt% density modifier, 2‑8wt% gel particles, and the balance is water. The preparation steps of the gel particles include: adding a plasticizer to an oil-soluble unsaturated diene monomer and an amino group-containing functional monomer, adding an initiator to polymerize after heating up to 60-80°C to obtain a gel, and The colloid is dried, ground and granulated to obtain gel particles. The invention also provides the application of the suspended gel particle plugging control agent in water plugging and profile control of oil-water wells in high water-cut blocks of oilfields.

Description

technical field [0001] The invention belongs to the field of plugging regulators for oil and water wells, and in particular relates to a plugging regulator of suspended gel particles and an application thereof. Background technique [0002] At present, technologies such as profile control and water shutoff, deep profile control and flooding, and binary flooding are mostly used in the water injection blocks of Liaohe Oilfield to improve the development effect of water flooding. Due to the poor selectivity of conventional profile control and water shutoff agents, it is easy to pollute the oil layer, the strength is low, and the validity period is short. There are great limitations in the production of more water layers, oil and water in the same layer, and bottom water coning. , many faults, unstable reservoir development, poor injection-production correspondence, and water injection blocks with high salinity appear to be lackluster. [0003] Existing granular deep profile co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/512E21B43/22
Inventor 陈小凯刘德铸曾双红王浩吴赞美贺梦琦郑猛李瑞龙华柳荣伟马昌明陈凯
Owner PETROCHINA CO LTD