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Asphaltene dispersant, application thereof and method for inhibiting deposition of asphaltene in heavy oil and removing asphaltene deposits in heavy oil

An asphaltene dispersant and asphaltene technology, applied in the field of inhibiting asphaltene precipitation in heavy oil and removing asphaltene deposits in heavy oil, asphaltene dispersant, can solve problems such as unsolvable clogging and complex components of heavy oil, To achieve the effect of ensuring normal production, low cost and wide sources

Active Publication Date: 2019-11-22
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the production process of heavy oil, due to the complex components of heavy oil, the existing asphaltene dispersants are difficult to meet the problem of suppressing asphaltene precipitation in heavy oil production, let alone solve the problem of clogging caused by deposits formed by asphaltene precipitation

Method used

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  • Asphaltene dispersant, application thereof and method for inhibiting deposition of asphaltene in heavy oil and removing asphaltene deposits in heavy oil
  • Asphaltene dispersant, application thereof and method for inhibiting deposition of asphaltene in heavy oil and removing asphaltene deposits in heavy oil
  • Asphaltene dispersant, application thereof and method for inhibiting deposition of asphaltene in heavy oil and removing asphaltene deposits in heavy oil

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preparation example Construction

[0062] The preparation method of the asphaltene dispersant comprises: adding the phenolic resin into the solvent, stirring at 50° C. for 2 hours, then mixing with the biophenolic compound, and continuing to stir for 2 hours to prepare the asphaltene dispersant. The asphaltene dispersants prepared in Examples 1-3 are respectively denoted as Dispersant A, Dispersant B and Dispersant C, and the specific formulations are shown in Table 1.

[0063] Table 1

[0064]

Embodiment 4

[0072] 30g of asphaltene precipitates, 70g of heavy oil and 0.1g of dispersant A were stirred at 60°C at a speed of 300rpm / min for 6h, and then left to stand for 24h to obtain a mixed oil. Samples were taken from the bottom of the mixed oil and observed with a UV-550 microscopic particle size analyzer. The microscopic enlarged photos are as follows figure 1 As shown, as can be seen from the figure, there are no obvious solid particles in the sample, indicating that the mixed oil is stable, and the average particle size and dispersibility of the mixed oil are shown in Table 3.

Embodiment 5

[0074] The mixed oil was prepared according to the method of Example 4, except that the dispersant A was replaced by the same mass of dispersant C, so as to obtain the mixed oil. Sampling was taken from the bottom of the mixed oil, and observed by a UV-550 microscopic particle size analyzer. The results showed that there were no obvious solid particles in the sample, indicating that the mixed oil was stable. The average particle size and dispersibility of the mixed oil are shown in Table 3 .

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Abstract

The invention relates to the field of crude oil exploitation, and discloses an asphaltene dispersant, application thereof, and a method for inhibiting deposition of asphaltene in heavy oil and removing asphaltene deposits in the heavy oil. The asphaltene dispersant comprises a biomass phenol compound, oil-soluble resin and a solvent, wherein the biomass phenol compound is cardanol and / or cashew nut shell oil. The asphaltene dispersant provided by the invention can effectively control the deposition of asphaltene in a heavy oil production process, and can effectively remove the existing asphaltene deposits, thereby ensuring the normal production of a heavy oil well.

Description

technical field [0001] The invention relates to the field of crude oil exploitation, in particular to an asphaltene dispersant and its application, and a method for inhibiting asphaltene precipitation in heavy oil and removing asphaltene deposits in heavy oil. Background technique [0002] Heavy oil resources are abundant in the world, which is a huge potential resource and will play an increasingly important role in future crude oil production. Among them, my country's Shengli Oilfield, Liaohe Oilfield, Tahe Oilfield, and Zhongyuan Oilfield The geological resources of oil reservoirs are very rich. [0003] During the production of heavy oil, due to changes in pressure and temperature, the components in the heavy oil are separated and the asphaltene in the heavy oil is precipitated. This phenomenon often occurs during the lifting of heavy oil wells. In addition, heavy oil, super heavy oil and super heavy oil are often produced by blending thin oil for viscosity reduction. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 江建林高敏李财富余伟发
Owner CHINA PETROLEUM & CHEM CORP
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