Oil well de-blocking agent as well as preparation method and application thereof

A plug-removing agent and technology for oil wells, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc. Simple preparation process

Active Publication Date: 2018-10-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The object of the present invention is also to provide the application of the oil well plugging remover in oil well plugging removal in the oil well production process; it can solve the colloid and asphaltene plugging problems of high temperature, high pressure deep well oil pipes and near wellbore areas, and after plugging removal The solution does not need to flow back, and can directly enter the surface manifold system with the well fluid after the well is opened

Method used

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  • Oil well de-blocking agent as well as preparation method and application thereof
  • Oil well de-blocking agent as well as preparation method and application thereof
  • Oil well de-blocking agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides an oil well plugging remover, the raw material components of which include:

[0027] 30% aromatic hydrocarbon solvent (composition of S-100 and xylene mass ratio of 2:1), 45% aviation kerosene, 15% oil-soluble penetrant (oleic acid diethanolamide and linoleic acid diethanolamide quality ratio is 3:1 composition) and 10% nonionic surfactant (sorbitan monostearate (Span60) and sorbitan fatty acid ester (Span80) mass ratio is the combination of 2:1 things).

[0028] This implementation also provides the preparation method of this oil well plugging remover, it comprises the following steps:

[0029] According to the above-mentioned raw materials and their proportions, add aromatic hydrocarbon solvent, aviation kerosene, oil-soluble penetrant and non-ionic surfactant into the reaction kettle, and stir at a constant temperature of 35-45°C for 1-1.5h to obtain the oil well plugging remover .

[0030] This embodiment also provides the application of ...

Embodiment 2

[0033] This embodiment provides an oil well plugging remover, the raw material components of which include:

[0034] 45% aromatic hydrocarbon solvent (composition of S-100 and xylene mass ratio of 2:1), 30% aviation kerosene, 20% oil-soluble penetrating agent (oleic acid diethanolamide and linoleic acid diethanolamide quality ratio is 1:1 composition) and 5% nonionic surfactant (sorbitan monostearate (Span60) and sorbitan fatty acid ester (Span80) mass ratio is the combination of 1:1 things).

[0035] This implementation also provides the preparation method of this oil well plugging remover, it comprises the following steps:

[0036] According to the above-mentioned raw materials and their proportions, add aromatic hydrocarbon solvent, aviation kerosene, oil-soluble penetrant and non-ionic surfactant into the reaction kettle, and stir at a constant temperature of 35-45°C for 1-1.5h to obtain the oil well plugging remover .

[0037] This embodiment also provides the applicat...

Embodiment 3

[0040] This embodiment provides an oil well plugging remover, the raw material components of which include:

[0041] 40% aromatic hydrocarbon solvent (composition of S-100 and xylene mass ratio of 2:1), 35% aviation kerosene, 18% oil-soluble penetrant (oleic acid diethanolamide and linoleic acid diethanolamide quality ratio is 1:3 composition) and 7% nonionic surfactant (sorbitan monostearate (Span60) and sorbitan fatty acid ester (Span80) mass ratio is the combination of 1:2 things).

[0042] This implementation also provides the preparation method of this oil well plugging remover, it comprises the following steps:

[0043] According to the above-mentioned raw materials and their proportions, add aromatic hydrocarbon solvent, aviation kerosene, oil-soluble penetrant and non-ionic surfactant into the reaction kettle, and stir at a constant temperature of 35-45°C for 1-1.5h to obtain the oil well plugging remover .

[0044] This embodiment also provides the application of t...

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Abstract

The invention provides an oil well de-blocking agent as well as a preparation method and application thereof. The oil well de-blocking agent is prepared from the following ingredients through being metered by regarding the total weight of the de-blocking agent as 100 percent: 30 to 45 percent of aromatics solvents, 30 to 45 percent of kerosene, 15 to 20 percent of oil soluble penetrating agents and 5 to 10 percent of nonionic surfactants. Compared with the existing oil well de-blocking agent, the oil well de-blocking agent has the advantages that the open flash point can reach a value being 50DEG C or above; the safety is high; the preparation process is simple; the de-blocking efficiency on asphaltene and colloidal sediments is high; the solution after the de-blocking does not need to bedischarged out and can directly enter a ground surface manifold system; safety and environment protection are realized; the de-blocking agent is applicable to the oil well and near-well zone blockingmaterial de-blocking in the oil well mining process.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemical additives, and in particular relates to an oil well plug-removing agent and its preparation method and application. Background technique [0002] Solid phase deposition in oil and gas systems has always been a serious problem faced by the petroleum industry. The deposition of organic solid phase may occur in various production links of oil and gas extraction. The problems caused by organic matter deposition can be summarized in the following aspects: (1) When crude oil enters the wellbore or perforation hole from the formation, the pressure drop is the largest, so asphaltene deposition is more serious near the wellbore and in the perforation hole . (2) The deposition in the formation pores causes the permeability of the rock to deteriorate, resulting in a decrease in production capacity. (3) Deposits in the wellbore and downhole equipment, surface pipelines, containers, and equipment,...

Claims

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Application Information

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IPC IPC(8): C09K8/524E21B37/06
CPCC09K8/524E21B37/06
Inventor 郭东红崔晓东孙建峰杨晓鹏侯庆锋郑晓波
Owner PETROCHINA CO LTD
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