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High-temperature profile control temporary plugging agent as well as preparation method and application thereof

A temporary plugging agent and profile control technology, which is applied in chemical instruments and methods, drilling compositions, etc., can solve the problem that the curing speed of thermosetting resin is very sensitive to temperature, the temperature resistance cannot meet the requirements of steam flooding profile control, foam Low plugging strength of water blocking agent, etc., to achieve high plugging rate, strong low-temperature curing ability, and high bonding strength

Active Publication Date: 2016-09-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large particle size and non-selectivity of granular plugging agents, and poor permeability to formation pore throats, it is easy to cause damage to the reservoir; the price of high-temperature organic jelly is relatively high, and the curing speed of thermosetting resin is very sensitive to temperature, and the controllability is poor. Moreover, the temperature resistance cannot meet the requirements of steam flooding profile control; the plugging strength of foam water blocking agent is low, and the high temperature and high pressure steam can easily penetrate

Method used

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  • High-temperature profile control temporary plugging agent as well as preparation method and application thereof
  • High-temperature profile control temporary plugging agent as well as preparation method and application thereof
  • High-temperature profile control temporary plugging agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] This embodiment provides a high-temperature profile-controlling temporary plugging agent. The raw materials for preparing the high-temperature profile-controlling temporary plugging agent include:

[0037] Melamine: 4%,

[0038] Formaldehyde aqueous solution: 12%, mass concentration is 37%,

[0039] Acrylamide: 2%,

[0040] Diallyl phthalate: 0.2%,

[0041] Sodium persulfate: 0.2%,

[0042] The balance is sewage from Liaohe Oilfield, 40°C.

[0043] The specific preparation process of the high temperature profile control temporary plugging agent is as follows:

[0044] (1) Add melamine and formaldehyde aqueous solution to the oilfield sewage at 40°C-60°C in sequence, fully stir and dissolve for 20-30min, and the stirring speed is 50-200r / min;

[0045] (2) Add acrylamide, diallyl phthalate and sodium persulfate successively to the above solution;

[0046] (3) After continuing to stir for 30 minutes, a high temperature profile control temporary plugging agent was obt...

Embodiment 2

[0048] This embodiment provides a high-temperature profile-controlling temporary plugging agent. The raw materials for preparing the high-temperature profile-controlling temporary plugging agent include:

[0049] Benzomelamine: 1%,

[0050] Aqueous solution of urotropine: 1.5%, mass concentration is 40%,

[0051] Acrylamide: 0.5%,

[0052] Diallyl isophthalate: 0.05%,

[0053] Potassium persulfate: 0.05%,

[0054] The balance is sewage from Liaohe Oilfield.

[0055] The specific preparation process of the high temperature profile control temporary plugging agent is as follows:

[0056] (1) Add the aqueous solution of benzomelamine and urotropine to the oilfield sewage at 40°C-60°C in sequence, fully stir and dissolve for 20-30min, and the stirring speed is 50-200r / min;

[0057] (2) Add acrylamide, diallyl isophthalate and potassium persulfate successively to the above solution;

[0058] (3) After continuing to stir for 30 minutes, a high temperature profile control tempo...

Embodiment 3

[0064] This embodiment provides a high-temperature profile-controlling temporary plugging agent. The raw materials for preparing the high-temperature profile-controlling temporary plugging agent include:

[0065] Melamine: 2%,

[0066] Aqueous solution of urotropine: 6%, mass concentration is 37%,

[0067] Acrylamide: 1%,

[0068] Diallyl phthalate: 0.1%,

[0069] Potassium persulfate: 0.1%,

[0070] The balance is sewage from Liaohe Oilfield.

[0071] The specific preparation process of the high temperature profile control temporary plugging agent is as follows:

[0072] (1) Add the aqueous solution of melamine and urotropine to the oilfield sewage at 40°C-60°C in sequence, stir and dissolve fully for 20-30min, and the stirring speed is 50-200r / min;

[0073] (2) Add acrylamide, diallyl phthalate and potassium persulfate successively to the above solution;

[0074] (3) After continuing to stir for 30 minutes, a high temperature profile control temporary plugging agent wa...

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Abstract

The invention provides a high-temperature profile control temporary plugging agent as well as a preparation method and application thereof. In percentage by weight, the high-temperature profile control temporary plugging agent is prepared from the following raw materials: 1-4% of a melamine type substance, 0.5-5% of aldehyde and / or hexamethylenetetramine, 0.5-2% of acrylamide, 0.05-0.2% of a plasticizer, 0.05-0.2% of persulfate, and the balance of water. The high-temperature profile control temporary plugging agent has the characteristics of good pumping property, temperature resistance, long-term effectiveness, simple preparation, low cost and the like; moreover, the high-temperature profile control temporary plugging agent is adjustable in gelling time and strong in plugging capacity, can adapt to a wide range of oil reservoir types, cannot pollute a stratum layer easily, and can enter deep parts of the stratum layer, thereby effectively solving production problems of uneven steam drive oil reservoir steam absorption profile, inter-well steam channeling and the like.

Description

technical field [0001] The invention belongs to the technical field of oil field development, and in particular relates to a high-temperature profile control temporary plugging agent and a preparation method and application thereof. Background technique [0002] Super heavy oil reservoirs refer to heavy oil reservoirs with a degassed crude oil viscosity greater than 50,000 mPa·s under formation temperature conditions. Due to the high viscosity of crude oil, it is difficult for crude oil to flow under the original formation conditions, so the development method of thermal recovery must be adopted. [0003] Steam injection is currently the most important thermal recovery method for heavy oil, mainly including steam huff and puff and steam flooding. For super-heavy oil reservoirs, steam flooding can generally increase the recovery rate by about 15% on the basis of steam huff and puff, and the overall recovery rate can reach about 25%-45%. [0004] Compared with ordinary heavy...

Claims

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Application Information

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IPC IPC(8): C09K8/512
CPCC09K8/512
Inventor 陈小凯郑健王春根邵识远李军曾双红刘靖炜郭琳马昌明贺梦琦杨连行王浩杜海旺王宁李超
Owner PETROCHINA CO LTD
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