High-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor

A wax removal, prevention and environmental protection technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of affecting output, limited scope of popularization and application, high flammability, explosion and toxicity, etc. Fast speed, overcoming the singularity of effect, and good effect of condensed oil hanging on the wall

Inactive Publication Date: 2014-03-19
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oil-based solvent wax remover has high wax removal efficiency but has pungent odor, low density, volatile, flammable, explosive, high toxicity, poor safety, and poor application effect in oil wells with high water content. Using solvent-based wax remover to remove wax will cause the pump stator material to expand, deform and damage; water-based wax remover has low toxicity, but it is mainly surfactant. Due to the high price of surfactant, the use concentration is large, and the...

Method used

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  • High-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor
  • High-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor
  • High-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 5.4g compound emulsifier preparation: weigh 3.4g triethanolamine sodium, 2g C 18 Mixture of unsaturated olefinic acids;

[0013] Main agent A agent system preparation: Weigh 2g alkylnaphthalene T801, 50g xylene, 5.4g compound emulsifier, 13g ethanol, 29.6g water and mix and stir;

[0014] Preparation of adjuvant B agent system: Weigh 10g of hydrochloric acid (31%) and mix with 40g of water.

Embodiment 2

[0016] 3g compound emulsifier preparation: weigh 1.9g sodium oleate, 1.1g C 18 Mixture of unsaturated olefinic acids;

[0017] Main agent A agent system preparation: Weigh 1g alkylnaphthalene T801, 51g xylene, 3g emulsifier, 15g methanol, 30g water and mix and stir;

[0018] Preparation of auxiliary agent B system: weigh 10g of hydrochloric acid (31%) and mix with 40g of water

[0019] The compound antifreeze emulsion paraffin remover of this formula is compared with the traditional oil-soluble solvent paraffin remover in field application of the No. 7 oil production plant in Daqing Oilfield, as shown in Table 1:

[0020] It can be seen from Table 1 that, with the same percentage of chemicals added, the compound antifreeze emulsion wax remover is obviously faster than the traditional oil-soluble wax remover, and the action period is longer.

[0021] Table 1

[0022]

[0023] Indoor evaluation effect of the composite antifreeze emulsion wax clearing agent:

[0024] (1) ...

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Abstract

The invention relates to a high-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor, which mainly solves problems of oil well large operation load caused by severe paraffin precipitation of high paraffin-containing oil wells at alpine regions, and compromising oil well yield caused by short hot washing period. The paraffin remover and inhibitor comprises a main agent of A agent system, and an auxiliary agent of B agent system, wherein the main agent of A agent system comprises the following component by weight: 1-3% of oil-soluble high-molecular polymer, 40-60% of aromatic hydrocarbon organic solvents, 10-20% of low carbon alcohol, 3-10% of composite emulsifiers, and 10-30% of water; the auxiliary agent of B agent system comprises the following component by weight: 7-15% of acid electrolytes, and 85-93% of water; the ratio of the main agent of A agent system to the auxiliary agent of B agent system is 100:0.8-1.2. The high-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor can effectively remove paraffin and inhibit paraffin, reaches the purposes of reducing oil well operation load and prolonging well washing period, has a low condensation point, and thus is especially suitable for winter paraffin removal at alpine regions.

Description

Technical field: [0001] The invention relates to the technical field of chemical paraffin removal and anti-wax for production wells in oil fields, in particular to an efficient and environment-friendly compound antifreeze type emulsion anti-wax agent. Background technique: [0002] For oilfields in alpine regions, crude oil has high wax content and high freezing point. In the later stage of development, wax deposition in production wells is serious, and the hot cleaning cycle of oil wells is short, which affects production. At present, the wax removers and anti-wax agents used on site are mainly traditional oil-based solvent wax removers and water-based wax removers. Oil-based solvent wax remover has high wax removal efficiency but has pungent odor, low density, volatile, flammable, explosive, high toxicity, poor safety, and poor application effect in oil wells with high water content. Using solvent-based wax remover to remove wax will cause the pump stator material to expa...

Claims

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Application Information

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IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 张爱兰周子豪
Owner BC P INC CHINA NAT PETROLEUM CORP
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