Asphaltene deposit dispersant

A dispersant and asphaltene technology, applied in the field of asphaltene sediment dispersants, can solve the problems of limited dissolving ability of asphaltenes and change in dispersing effect, and achieve the effect of high dissolution rate and small dosage

Active Publication Date: 2014-10-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The dispersants described in the above technologies can only partially solve the problems caused by the precipitation of asphaltene, and have limited ability to dissolve asphaltene. Some dispersants are only effective in a limited range such as light oil exploitation. change, the dispersion effect will change greatly

Method used

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  • Asphaltene deposit dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 0.05g of 2-nonylnaphthalenesulfonic acid and dissolve it evenly in 0.1g of n-pentane. Weigh 0.35g R1CH(R2)COCH 3 Dissolved in the above mixed solution to obtain asphaltene deposit dispersant. Weigh 10g of the asphaltene sediment from well TH10316 in Tahe, Xinjiang, mix it with the dissolving agent and dispersing agent evenly with magnetic stirring, and calculate the dissolution rate. The results are shown in Table 1.

Embodiment 2

[0026] Weigh 0.1 g of alkylnaphthalene with a molecular weight of 5000, and dissolve it in 0.5 g of cyclohexane evenly. Weigh 1.4g R1CH(R2)COCH 3 Dissolve in the above mixed solution to obtain asphaltene deposit dissolving agent dispersant. Weigh 10g of asphaltene deposits from Xinjiang Tahe TK614 heavy oil well, mix them with the dispersant evenly with magnetic stirring, and calculate the dissolution rate. The results are shown in Table 1.

Embodiment 3

[0028] Weigh 0.1g of polymethacrylate with a molecular weight of 2000, dissolve it evenly in 0.1g of straight-run kerosene, weigh 0.8g of R1CH(R2)COCH 3 Dissolve in the above mixed solution to obtain asphaltene deposit dissolving agent dispersant. Weigh 10g of the asphaltene sediment from well TH10316 in Tahe, Xinjiang, mix it with the dissolving agent and dispersing agent evenly with magnetic stirring, and calculate the dissolution rate. The results are shown in Table 1.

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Abstract

The invention relates to an asphaltene deposit dispersant. The dispersant comprises the following components, by mass, 50-90% of a ketone, 5-45% of an asphaltene stabilizer, and the balance solvent, wherein the ketone comprises one or more of ketones having a general formula of R1CH(R2)COCH3, R1 and R2 are branched chain alkyl groups and can be same with each other or different from each other, and the sum of the carbon numbers of the R1 and the R2 is in a range of 10-50. The asphaltene deposit dispersant provided by the invention has the characteristics of high asphaltene deposit dissolving rate, small dosage, safety, and stability, is suitable for removing obstruction deposits in well holes in the viscous oil recovery process, and can also be used for dispersing obstruction objects near wells, or removing asphaltene deposits in ground pipelines and equipment in the pipeline transportation process.

Description

technical field [0001] The invention relates to an asphaltene deposit dispersant. Background technique [0002] In recent years, the international crude oil price has continued to fluctuate at a high level, and the demand for oil has continued to rise. At the same time, stimulated by high oil prices, the production technology and operation management level of heavy oil in various countries have been rapidly improved, which not only reduces the production cost of heavy oil, but also makes it impossible to produce heavy oil. The marginal heavy oil and bitumen reservoirs of exploitation value become effective resources with economic value. According to the report of "Oil and Gas Impurities" in the United States, in 2004 and 2005, the growth rate of world crude oil production was 1.5%, while the growth rate of heavy oil was 6% and 3%. [0003] Heavy oil contains more colloids and asphaltenes, has high viscosity, poor fluidity, is difficult to exploit, and has a low recovery fac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524
Inventor 秦冰罗咏涛
Owner CHINA PETROLEUM & CHEM CORP
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