Fireflooding channeling sealing agent and preparation method thereof

A technology of fire-flooding sealing channeling agent and regulator, applied in chemical instruments and methods, drilling composition and other directions, can solve the problem of low sealing strength of foam-type water blocking agent, very sensitive curing speed to temperature, and gel particles. The problems such as the inability to inject the plugging agent to achieve the effect of adapting to a wide range of reservoir types, excellent adsorption characteristics and strong plugging ability

Active Publication Date: 2016-03-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, conventional cement and other granular plugging agents have the disadvantages of large particle size, non-selectivity, and easy to cause damage to the reservoir; high-temperature organic gels are relatively expensive; thermosetting resins are non-selective, and the curing speed is very sensitive to temperature, so the controllability is poor; Gel particle plugging agent cannot be injected deep into the formation; foam water blocking agent has too low plugging strength and poor formation adaptability

Method used

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  • Fireflooding channeling sealing agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a fire flooding sealing agent. In terms of weight percentage, the raw materials for preparing the fire flooding sealing agent include:

[0027] Melamine: 0.5%;

[0028] Guaiacol: 0.2%;

[0029] Formaldehyde: 2%;

[0030] Oxalic acid: 0.5%;

[0031] Liquid XZ-LY102 for nano-alumina oily resin: 0.2%;

[0032] Ultrafine silica: 10%; average particle size 10-20nm;

[0033] The balance is oilfield sewage.

[0034] The specific preparation process is:

[0035] (1) Add melamine, guaiacol, liquid XZ-LY102 for nano-alumina oleoresin and oxalic acid into oilfield sewage above 50°C, fully stir and dissolve for 20-30min at a stirring speed of 50-200r / min, and obtain a mixture solution;

[0036] (2) Add formaldehyde (formaldehyde solution with a mass concentration of 37-40%) and ultrafine silicon dioxide to the above mixed solution in sequence, and continue stirring for 30 minutes to obtain a fire flooding sealing agent.

Embodiment 2

[0038] This embodiment provides a fire flooding sealing agent. In terms of weight percentage, the raw materials for preparing the fire flooding sealing agent include:

[0039] Benzomelamine: 3%;

[0040] Methylguaiacol: 1%;

[0041] Formaldehyde: 8%;

[0042] Glacial acetic acid: 2%;

[0043] Liquid XZ-LY102 for nano-alumina oily resin: 1.2%;

[0044] Ultrafine silica: 20%; average particle size 10-20nm;

[0045] The balance is oilfield sewage.

[0046] The specific preparation process is:

[0047] (1) Add benzomelamine, methylguaiacol, liquid XZ-LY102 for nano-alumina oleoresin and glacial acetic acid to the oilfield sewage above 50°C, fully stir and dissolve for 20-30min, and the stirring speed is 50-200r / min, to obtain a mixed solution;

[0048] (2) Add formaldehyde (formaldehyde solution with a mass concentration of 37-40%) and ultrafine silicon dioxide to the above mixed solution in sequence, and continue stirring for 30 minutes to obtain a fire flooding sealing a...

Embodiment 3

[0054] This embodiment provides a fire flooding sealing agent. In terms of mass percentage, the raw materials for preparing the fire flooding sealing agent include:

[0055] Melamine: 2%;

[0056] Eugenol: 0.5%;

[0057] Herotropine: 4%;

[0058] Oxalic acid: 1%;

[0059] Liquid XZ-LY102 for nano-alumina oleoresin: 0.6%;

[0060] Ultrafine silica: 15%; average particle size 10-20nm;

[0061] The balance is oilfield sewage.

[0062] The specific preparation process is:

[0063] (1) Add melamine, eugenol, liquid XZ-LY102 for nano-alumina oleoresin, and oxalic acid to oilfield sewage above 50°C, fully stir and dissolve for 20-30min, and the stirring speed is 50-200r / min to obtain a mixed solution;

[0064] (2) Add urotropine and superfine silicon dioxide to the above mixed solution in sequence, and continue stirring for 30 minutes to obtain a fire flooding sealing agent.

[0065] The fire flooding channeling agent prepared above was subjected to a core single-pipe simulation...

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Abstract

The invention provides a fireflooding channeling sealing agent and its preparation method. Raw materials for preparing the fireflooding channeling sealing agent contain, by weight, 0.5-3% of a melamine substance, 0.2-1% of phenol, 2-8% of aldehyde, 0.5-2% of a pH regulator, 0.2-1.2% of a nano-alumina oleoresin liquid XZ-LY102, 10-20% of ultrafine silicon dioxide and the rest of water. Sealing rate of the fireflooding channeling sealing agent can reach 93%; temperature resistance reaches 300 DEG C; the highest salinity tolerance reaches 150,000 mg/L; expriation data can reach 6 months and above under the steam condition of 300 DEG C; viscosity of a profile control agent before gel forming is 150-1,500 mPa.S; sealing strength can reach 31 MPa/m; and gel forming time can be controlled within 12-36h. By the use of the fireflooding channeling sealing agent, deep profile control of an oil layer can be realized.

Description

technical field [0001] The invention belongs to the technical field of oil field development, and in particular relates to a fire flooding sealing agent and a preparation method thereof. Background technique [0002] Currently, the Liaohe Oilfield has developed incineration technology in the blocks Du 66, Shu 13832, Gao 3618, Gao 3, Leng 37 and Gao 246. In the process of fire flooding development, due to the heterogeneity of the development of the reservoir in the plane and vertical direction, it is very easy to cause uneven advancement of the plane and vertical fire line, uneven effect, serious gas channeling, and production wells due to gas channeling. Normal mining cannot be performed, which seriously affects the development effect of fire flooding. [0003] In recent years, related technologies have been relatively mature for the problem of steam channeling due to steam drive. However, since the combustion of oil reservoirs is an emerging technology, its technology is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G14/10C09K8/512C08K3/22C08K3/36
CPCC08G14/10C08K3/22C08K3/36C08K2003/2227C08K2201/011C09K8/512
Inventor 袁立英陈小凯同松羊勇唐莹莹袁庆佳温栋良郑猛刘靖炜李瑞马昌明王馨竹俸莉孙晔张挺
Owner PETROCHINA CO LTD
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