High-temperature gel channeling sealing agent as well as preparation method and application thereof

A technology of high temperature resistant gel and sealing and channeling agent, which is applied in the field of oil production, can solve the problems of plugging and channeling agent sedimentation at the bottom of the well and block the wellbore, and achieves the effects of controllable plugging strength, low initial viscosity and good suspension.

Active Publication Date: 2022-05-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a high-temperature gel sealing agent suitable for channeling construction in wells with severe casing damage (including heavy oil wells with severe casing damage). The problem of the channeling agent settling at the bottom of the well and blocking the wellbore in the channeling

Method used

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  • High-temperature gel channeling sealing agent as well as preparation method and application thereof
  • High-temperature gel channeling sealing agent as well as preparation method and application thereof
  • High-temperature gel channeling sealing agent as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0030] The present embodiment provides a high-temperature gel sealing and channeling agent. In mass percentage, the raw materials for preparing the high-temperature gel sealing and channeling agent include:

[0031] 6% mineral powder;

[0032] 3% sodium bentonite;

[0033] 0.3% glycerol polyoxyethylene ether cocoate;

[0034] 0.2% calcium lignosulfonate;

[0035] 0.25% carbon black;

[0036] 0.8% fly ash;

[0037] 0.016% sodium carbonate;

[0038] 0.01% β-naphthalene sulfonate formaldehyde condensate;

[0039] 0.006% ethylene-vinyl acetate copolymer;

[0040] 0.007% tetradecyldimethylbenzylammonium chloride

[0041] balance of water.

[0042] The specific preparation process is:

[0043] (1) successively adding mineral powder, sodium bentonite, glycerol polyoxyethylene ether cocoate, calcium lignosulfonate, carbon black, fly ash and sodium carbonate components into a liquid dispensing tank containing an appropriate amount of water, At room temperature, stir for 25 mi...

Embodiment 2

[0070] The present embodiment provides a high-temperature gel sealing and channeling agent. In mass percentage, the raw materials for preparing the high-temperature gel sealing and channeling agent include:

[0071] 9% mineral powder;

[0072] 4% sodium bentonite;

[0073] 0.5% glycerol polyoxyethylene ether cocoate;

[0074] 0.3% calcium lignosulfonate;

[0075] 0.35% carbon black;

[0076] 1.2% fly ash;

[0077] 0.02% sodium carbonate;

[0078] 0.012% β-naphthalene sulfonate formaldehyde condensate;

[0079] 0.008% ethylene-vinyl acetate copolymer;

[0080] 0.01% tetradecyldimethylbenzylammonium chloride

[0081] balance of water.

[0082] The specific preparation process is:

[0083] (1) successively adding mineral powder, sodium bentonite, glycerol polyoxyethylene ether cocoate, calcium lignosulfonate, carbon black, fly ash and sodium carbonate components into a liquid dispensing tank containing an appropriate amount of water, At room temperature, stir for 30 min...

Embodiment 3

[0112] The high temperature gel sealing and channeling agent prepared in Example 2 was applied to profile control and channeling sealing of huff and puff wells in heavy oil reservoirs.

[0113] Specifically, taking Well Du H5, a production well in Block Du 813 of Liaohe Oilfield, as an example, the well mainly has problems such as serious steam channeling and high water cut. At the same time, the casing of the wellbore has become serious, and conventional production stimulation control measures cannot be carried out, resulting in shut-in. In order to restore the productivity of the well, high temperature profile control and channeling sealing were implemented for the well.

[0114] The specific construction process includes: the dosage of high temperature gel sealing channeling agent is 1065m 3 , the displacement is 7.5m 3 / h, the initial injection construction pressure is 5.2MPa, the construction pressure rises slowly during the whole process, and the construction end pressu...

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Abstract

The invention provides a high-temperature gel channeling sealing agent as well as a preparation method and application thereof. The invention discloses a preparation method of an anti-aging agent. The high-temperature gel channeling sealing agent is prepared from the following raw materials: 5 to 10 percent of mineral powder, 2 to 5 percent of sodium bentonite, 0.2 to 0.6 percent of glyceryl polyoxyethylene ether cocoate, 0.1 to 0.5 percent of calcium lignosulphonate, 0.1 to 0.4 percent of carbon black, 0.5 to 2 percent of coal ash, 0.01 to 0.05 percent of sodium carbonate, 0.008 to 0.016 percent of beta-naphthalenesulfonate formaldehyde condensate, 0.005 to 0.01 percent of ethylene-vinyl acetate copolymer and the balance of water. 0.006-0.012% of tetradecyl dimethyl benzyl ammonium chloride and the balance of water. The high-temperature gel channeling sealing agent is suitable for channeling sealing construction of a well with serious casing damage, and solves the problem that when a conventional plugging agent is used for channeling sealing of the well with serious casing damage, the channeling sealing agent settles at the bottom of the well and blocks a shaft.

Description

technical field [0001] The invention belongs to the technical field of oil production, and in particular relates to a high-temperature gel channeling sealing agent suitable for heavy oil casing damage wells, and a preparation method and application thereof. Background technique [0002] During the steam huff and puff production process of some super heavy oil blocks, uneven production of oil layers and serious steam channeling occurred. The high-strength profile control sealing channeling technology effectively expanded the steam swept volume and improved the cycle production. However, with the increase of huff and puff rounds, the high temperature steam and formation stress change, causing massive damage to the casing. According to statistics, the number of casing damaged wells in some ultra-heavy oil blocks currently accounts for 59.2%, and close to 17.5% of the wells with severe casing damage cannot be operated. These oil wells cannot be improved by conventional plugging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/04C09K8/44
CPCC04B26/045C09K8/44C04B14/022C04B14/104C04B18/08C04B18/141C04B24/18C04B24/32C04B24/12C04B24/226C04B22/10Y02W30/91
Inventor 刘强张俊孙振宇李瑞马昌明陈小凯王尧匡旭光何强黄腾杨洋郭永强贺梦琦魏冉管紫君杨帆
Owner PETROCHINA CO LTD
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