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A kind of high temperature temporary plugging ball and its preparation method and application

A temporary plugging ball and high-temperature technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem that the temporary plugging agent cannot meet the needs of on-site construction, so as to shorten the time to restore production, use less, and The effect of saving development cost

Active Publication Date: 2020-10-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent application number 200910086548.1 discloses a high-strength temporary plugging agent and its preparation method, which uses acrylamide, N,N-methylenebisacrylamide, polymerization inhibitor, thickener, initiator gel breaker and Water composition, for formations with a temperature of 40-70°C, for medium-high temperature reservoirs with a temperature higher than 80°C, the persulfate-type gel-breaking system will quickly decompose, and the temporary plugging agent can no longer meet the needs of on-site construction

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  • A kind of high temperature temporary plugging ball and its preparation method and application

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Embodiment 1

[0031] This embodiment provides a high-temperature temporary plugging ball, which includes the following raw material components in weight percentage:

[0032] Soluble polytetrafluoroethylene 30%, heavy aromatic resin (C9 petroleum resin 10#-14#, produced by Shandong Qibang Resin Co., Ltd.) 45%, nonionic surfactant (polyoxyethylene fatty acid amide) 12%, softening point Additives (starch and lignite, whose proportions are adjusted as needed) 8% and plasticizer (dibutyl phthalate) 5%.

[0033] The high-temperature temporary plugging ball of this embodiment is prepared by the following method:

[0034] Crushing the heavy aromatic resin to obtain the crushed heavy aromatic resin;

[0035] Mix the pulverized heavy aromatic resin and softening point additive at a temperature of 200°C-250°C, stir with a mixer, heat and melt to obtain melted heavy aromatic resin;

[0036] Mix the melted heavy aromatic resin, plasticizer, and soluble polytetrafluoroethylene at a temperature above 30...

Embodiment 2

[0040] This embodiment provides a high-temperature temporary plugging ball, which includes the following raw material components in weight percentage:

[0041]Soluble polytetrafluoroethylene 47%, heavy aromatic resin (C9 petroleum resin 10#-14#, produced by Shandong Qibang Resin Co., Ltd.) 35%, nonionic surfactant (polyoxyethyl alkyl ether and polyoxyethylene Alkylamide, the ratio is adjusted as needed) 10%, softening point additive (sodium dodecylbenzene sulfonate and / or span-80, the ratio is adjusted as needed) 5% and plasticizer (phthalic acid Diisononyl ester) 3%.

[0042] The high-temperature temporary plugging ball of this embodiment is prepared by the following method:

[0043] Crushing the heavy aromatic resin to obtain the crushed heavy aromatic resin;

[0044] Mix the pulverized heavy aromatic resin and softening point additive at a temperature of 200°C-250°C, stir with a mixer, heat and melt to obtain melted heavy aromatic resin;

[0045] Mix the melted heavy aro...

Embodiment 3

[0049] This embodiment provides a high-temperature temporary plugging ball, which includes the following raw material components in weight percentage:

[0050] Soluble polytetrafluoroethylene 20%, heavy aromatic resin (C9 petroleum resin 10#-14#, produced by Shandong Qibang Resin Co., Ltd.) 50%, nonionic surfactant (fatty alcohol polyoxyethylene ether) 15%, softening Point additive (sodium dodecylbenzene sulfonate) 10% and plasticizer (dibutyl phthalate) 5%.

[0051] The high-temperature temporary plugging ball of this embodiment is prepared by the following method:

[0052] Crushing the heavy aromatic resin to obtain the crushed heavy aromatic resin;

[0053] Mix the pulverized heavy aromatic resin and softening point additive at a temperature of 200°C-250°C, stir with a mixer, heat and melt to obtain melted heavy aromatic resin;

[0054] Mix the melted heavy aromatic resin, plasticizer, and soluble polytetrafluoroethylene at a temperature above 300°C, continue to stir even...

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Abstract

The invention provides a high temperature temporary blocking ball and a preparation method and application thereof. By weight percentage, the high temperature temporary blocking ball includes 30%-60%of soluble polytetrafluoroethylene, 20%-50% of heavy aromatic resin, 10%-25% of nonionic surfactant, 5%-10% of softening point additives and 1-5% of plasticizer, and the sum is 100%. The high temperature temporary blocking ball can be applied to oil and water wells with severe losses in a high temperature oil reservoir, the construction process is simple, the usage amount is small, the effect is remarkable, the dual goals of finishing operation while protecting a stratum are achieved, and thus the efficiency of operations such as well repair, sand wash and well flushing is improved.

Description

technical field [0001] The invention relates to a high-temperature temporary plugging ball and its preparation method and application, belonging to the technical field of petrochemical industry. Background technique [0002] In the production process of oil wells, for oil wells in the middle and later stages of development, especially high-temperature oil wells with steam flooding or steam huff and puff, due to the influence of various development factors, oil wells have problems such as sand burial and serious wax deposition, and workover and washing are required. For operations such as wells and sand washing, due to the existence of large pores or high permeability layers in the formation, after the workover fluid, well flushing fluid, sand washing fluid and other operating fluids enter the oil well, they will be lost in a large amount in the formation, causing serious pollution to the formation. At the same time, the operating fluid If it cannot be completely flowed back ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508C09K8/516C09K8/514
CPCC09K8/5045C09K8/508C09K8/5083C09K8/5086C09K8/516C09K2208/18
Inventor 安志杰王浩李峰郑猛崔莉王喜泉戴倩倩刘畅李德胜张崇刚徐爽王雪梅刘燕李新王树强王建黄武鸣王肖磊王宁辉王佳昊周月慧邢盼盼刘烨
Owner PETROCHINA CO LTD