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A high temperature resistant profile control agent and preparation method thereof

A profile control agent, high temperature resistant technology, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of uneven steam suction profile and interwell steam channeling in steam flooding reservoirs, and achieve strong low temperature curing ability , Fast curing speed, good thermal stability

Active Publication Date: 2018-07-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a high temperature resistant profile control agent, which has a temperature resistance of 300°C, has a strong plugging ability, can enter deep formations, and effectively solves the problem of steam flooding reservoir absorption. Uneven steam profile, steam channeling between wells and other production problems

Method used

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  • A high temperature resistant profile control agent and preparation method thereof
  • A high temperature resistant profile control agent and preparation method thereof
  • A high temperature resistant profile control agent and preparation method thereof

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Embodiment 1

[0033] This embodiment provides a high temperature resistant profile control agent, in terms of mass percentage, the raw material composition of the profile control agent is:

[0034] Melamine: 4%;

[0035] Formaldehyde solution: 12%;

[0036] N,N-methylenebisacrylamide: 2%;

[0037] Diallyl phthalate: 0.2%;

[0038] Sodium persulfate: 0.2%;

[0039] The balance is sewage from Liaohe Oilfield, and the temperature is 40°C;

[0040] The mass percentage concentration of the above-mentioned formaldehyde solution is 37-40%.

[0041] The specific preparation process of the profile control agent is:

[0042] (1) Add melamine and formaldehyde solution to oilfield sewage at 40°C in sequence, stir and dissolve fully for 20-30min, and the stirring speed is 50-200r / min;

[0043] (2) Add N,N-methylenebisacrylamide, plasticizer, and initiator to the above solution in sequence, and continue stirring for 30 minutes to obtain a high-temperature-resistant profile control agent.

Embodiment 2

[0045] This embodiment provides a high temperature resistant profile control agent, in terms of mass percentage, the raw material composition of the profile control agent is:

[0046] Benzomelamine: 1%;

[0047] Hexatropine solution: 1.5%;

[0048] N,N-Methylenebisacrylamide: 0.5%;

[0049] Diallyl isophthalate: 0.05%;

[0050] Potassium persulfate: 0.05%;

[0051] The balance is sewage from Liaohe Oilfield;

[0052] The mass percentage concentration of the above-mentioned urotropine solution is 37-40%.

[0053] The specific preparation process of the profile control agent is:

[0054] (1) Add melamine and urotropine solution sequentially to the oilfield sewage above 40°C, fully stir and dissolve for 20-30min, and the stirring speed is 50-200r / min;

[0055] (2) Adding N,N-methylenebisacrylamide, plasticizer and initiator successively to the above solution;

[0056] (3) After continuing to stir for 30 minutes, a high temperature resistant profile control agent is obtaine...

Embodiment 3

[0062] This embodiment provides a high temperature resistant profile control agent, in terms of mass percentage, the raw material composition of the profile control agent is:

[0063] Melamine: 2%,

[0064] Hexatropine solution: 6%,

[0065] N,N-Methylenebisacrylamide: 1%,

[0066] Diallyl phthalate: 0.1%,

[0067] Potassium persulfate: 0.1%,

[0068] The balance is sewage from Liaohe Oilfield;

[0069] The mass percentage concentration of the above-mentioned urotropine solution is 37-40%.

[0070] The specific preparation process of the profile control agent is:

[0071] (1) Add melamine and urotropine solution sequentially to the oilfield sewage above 40°C, fully stir and dissolve for 20-30min, and the stirring speed is 50-200r / min;

[0072] (2) Adding N,N-methylenebisacrylamide, plasticizer and initiator successively to the above solution;

[0073] (3) After continuing to stir for 30 minutes, a high temperature resistant profile control agent is obtained.

[0074] T...

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Abstract

The invention provides a high-temperature-resistant profile control agent and a preparation method thereof. The high-temperature-resistant profile control agent is prepared from, by mass, 1-4% of melamine monomers, 0.555-4.8% of aldehyde and / or urotropine, 0.5-2% of N,N-methylene bisacrylamide, 0.05-0.2% of plasticizer, 0.05-0.2% of initiator and the balance water. The preparation method of the profile control agent includes the steps that the melamine monomers, the aldehyde and / or urotropine are sequentially added into the water, and a first solution is formed after stirring is completed; N,N-methylene bisacrylamide, the plasticizer and the initiator are sequentially added into the first solution, and the high-temperature-resistance profile control agent is obtained after stirring is completed. The temperature-resistant temperature of the profile control agent reaches 300 DEG C, the sealing capacity of the profile control agent is high, the profile control agent can enter the deep position of a stratum, and the production problems that steam drive oil reservoir steam absorption profiles are not uniform, and inter-well steam channeling occurs are effectively solved.

Description

technical field [0001] The invention provides a high-temperature-resistant profile control agent and a preparation method thereof, which belong to the technical field of oilfield water plugging and profile control. Background technique [0002] Due to the difference in permeability between layers and within layers, after many years of steam huff and puff or water injection development, many oilfields at home and abroad have experienced uneven vertical and horizontal effects, and some even have serious steam channeling or water channeling between wells , seriously affecting the effect of oilfield development. [0003] In order to improve the water injection effect and the ultimate recovery of the oilfield, it is necessary to take timely technical measures for water shutoff and profile control. At present, the methods of water shutoff and profile control are mainly mechanical sealing and chemical water shutoff. The construction of mechanical sealing is simple and the cost is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F222/38C08F222/26C08G12/32C09K8/512C09K8/88
CPCC08F222/26C08F222/38C08F283/00C08G12/32C09K8/512C09K8/887
Inventor 陈小凯孙伟曾双红刘靖炜李瑞郑猛贺梦琦刘强张景鑫李霞金涛李涛李伟陈达波马威
Owner PETROCHINA CO LTD
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