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Technical method of steam channeling and plugging of thick oil

A technology for thermal recovery and steam channeling of heavy oil, which is applied in the direction of production fluid, earthwork drilling, sealing/isolation, etc. It can solve the problem of not completely blocking the channel of steam channeling, and not considering the leakage of the plugging agent injected into the channel of steam channeling, etc. question

Inactive Publication Date: 2017-01-25
XINJIANG KARAMAY CAIFENG IND
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Problems solved by technology

[0003] The present invention provides a technical method for steam channeling plugging in thermal recovery of heavy oil, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problem that the existing technology does not take into account the leakage of the plugging agent injected into the channel of steam channeling and cannot completely block the steam channeling. channeling problem

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  • Technical method of steam channeling and plugging of thick oil
  • Technical method of steam channeling and plugging of thick oil

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Embodiment 1

[0017] Embodiment 1: The technical method of steam channeling plugging in the thermal recovery of heavy oil is carried out according to the following steps: in the first step, the cottonseed hulls with a mass percentage of solid particles of 30% to 60% and a mass percentage of 40% are Stir the water to 70% evenly and squeeze it into the steam channel with a high-pressure pump; in the second step, after the first step is completed, continue to mix wood chips with a mass percentage of 30% to 60% and a mass percentage of 40% Stir the water to 70% evenly and squeeze it into the steam channeling channel with a high-pressure pump; in the third step, after the second step is completed, squeeze in cement slurry to block the steam channeling channel; in the fourth step, squeeze in clean water to replace the cement slurry completely Enter the channel of steam channeling; the fifth step, close the well and wait for 48 hours to 72 hours. When in use, because sawdust and cottonseed hulls a...

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Abstract

The invention relates to the technical field of the technical method of steam channeling and plugging, a technical method of steam channeling and plugging of thick oil; the method comprises the following steps: the first step, stirring evenly the cottonseed hull with solid particle qulity percentage of 30% to 60% and water with quality percentage of 40% to 70% and squeezing into the steam channels with high pressure pump; the second step, after the completion of the first step, continuing to mix evenly the wood chips with percentage of 30% to 60% and the water with quality percentage of 40% to 70% and squeezinginto the steam channels with high pressure pump. The invention discloses a technical method of steam channeling and plugging of thick oil, which can effectively solve the problem of leakage of plugging agent. Sawdust and cottonseed hulls are solid soft particles that can be inflated by water and can be effectively plugged in the steam channel to improve oil exploiting rate. The method can save energy and reduce consumption, so as to reduce mining cost.

Description

technical field [0001] The invention relates to the technical field of steam channeling plugging technology, and relates to a technical method for steam channeling plugging in thermal recovery of heavy oil. Background technique [0002] Steam injection is the main technical method in the development of heavy oil. In the early stage, the steam stimulation technology can effectively improve the oil recovery and increase the production of oil wells, but in the middle and late stages of oilfield production, its effect is getting worse and worse. The reason is that the fine silt composition in the sandstone in the reservoir will experience the following consequences after steam flooding after the huff and puff cycle: 1. The rock formation cementation will become looser and looser under the action of high temperature and high pressure, and a large amount of formation sand will As the crude oil is brought out of the ground, the porosity of the formation increases with time, forming...

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Application Information

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IPC IPC(8): E21B33/13E21B43/24
CPCE21B33/13E21B43/24
Inventor 宋刚张治豪胡立新尚义刚马剑
Owner XINJIANG KARAMAY CAIFENG IND
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