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A multi-element synergistic plug-removing agent

A technology of synergistic effect and plug-removing agent, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of narrow application range, low success rate of plug-removal, unsatisfactory plug-removal effect, etc., reaching the scope of application Wide, high success rate of plugging removal, improve the effect of plugging removal effect

Active Publication Date: 2018-03-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects existing in the prior art, the present invention provides a multi-component synergistic plugging removal agent, which is mainly used in the plugging removal operation in the exploration and development process, and utilizes the synergistic effect of various chemical agent components, which can It can remove various blockages such as inorganic, organic, polymer, bacteria and products, and emulsification. issues such as narrow scope

Method used

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  • A multi-element synergistic plug-removing agent

Examples

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Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a multivariate synergistic block-removing agent, and its component mass ratio is composed of: 80-120 parts of water (tap water), 5-10 parts of cleaning and dissolving agent, 15-20 parts of corrosion agent, ammonium bifluoride 0.5-1 part, 0.4-0.6 part of Ninar, 2.5-3 parts of dodecyltrimethylammonium chloride, 0.1-0.3 part of ammonium persulfate, 2.5-3 parts of SA-3 corrosion inhibitor, HY215 for acidification 3-5 parts of iron ion stabilizer.

[0039] For example, the multi-element synergistic plug-removing agent has the following composition mass ratio: 120 parts of tap water; 5 parts of cleaning solvent; 15 parts of corrosion agent; 0.5 parts of ammonium bifluoride; 0.4 parts of Ninar; 2.5 parts of alkyltrimethylammonium chloride; 0.1 part of ammonium persulfate; 2.5 parts of SA-3 corrosion inhibitor; 3 parts of iron ion stabilizer for HY215 acidification. When in use, the multi-component synergistic plug-removing agent is transported to the ...

Embodiment 2

[0061] Based on the same inventive concept, this embodiment provides a method for preparing a multi-element synergistic plug-removing agent, such as figure 1 shown, including:

[0062] Step S101: 50-60 parts of xylene, 27-33 parts of petroleum ether, 5-7 parts of alkylphenol polyoxyethylene ether (Oπ-4), 5-7 parts of alkylphenol polyoxyethylene ether (Oπ-10) Parts, 2-4 parts of octadecyl alcohol polyoxyethylene ether (JFC-4), mix and stir in the container to become a cleaning solvent.

[0063] Step S102: Mix 12-16 parts of hydrochloric acid, 4-6 parts of phosphoric acid, 8-12 parts of hydrofluoric acid, and 80-90 parts of tap water in a container and stir evenly to form a corrosion agent.

[0064] Step S103: mix 80-120 parts of tap water, 5-10 parts of cleaning solvent, 15-20 parts of corrosion agent, 0.5-1 part of ammonium bifluoride, 0.4-0.6 part of Ninar, dodecyltrimethylammonium chloride 2.5-3 parts, 0.1-0.3 parts of ammonium persulfate, 2.5-3 parts of SA-3 corrosion inh...

Embodiment approach

[0070] The first one can be 120 parts by mass of tap water, 5 parts of cleaning solvent, 15 parts of corrosion agent, 0.5 part of ammonium bifluoride, 0.4 part of Ninar, 2.5 parts of dodecyltrimethylammonium chloride, persulfuric acid 10 tons of the multi-component synergistic plug-removing agent were prepared at the ratio of 0.1 parts of ammonium, 2.5 parts of SA-3 corrosion inhibitor, and 3 parts of iron ion stabilizer for HY215 acidification. When in use, it is transported to the construction site and injected into the target layer by a cement truck. According to indoor tests, the dissolution rate of organic plugs is 81%, the dissolution rate of inorganic plugs is 91%, the degradation rate of polymer plugs is 72%, and the recovery rate of core permeability is 86%.

[0071] The second one can be 80 parts of tap water, 10 parts of cleaning solvent, 20 parts of corrosion agent, 1 part of ammonium bifluoride, 0.6 parts of Ninar, 3 parts of dodecyltrimethylammonium chloride, 3 p...

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Abstract

The invention discloses a multiple-synergism type lockage removal agent, which comprises components with parts by weight: water 80-120 parts, cleaning dissolving agents 5-10 parts, dissolution agents 15-20 parts, ammonium hydrofen difluoride 0.5-1 part, ninol 0.4-0.6 part, dodecyl trimethyl ammonium chloride 2.5-3 parts, ammonium persulfate 0.1-0.3 part, (SA-3) inhibiters 2.5-3 parts and ferric ion stabilizers for acidification. The multiple-synergism type lockage removal agent has the advantages of wide range of application, excellent lockage removal effect and high lockage removal successful rate and the like.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a multi-element synergistic plug-removing agent. Background technique [0002] In the process of petroleum exploration and development, oil layer pollution is an important factor restricting the production of oil wells and affecting the water injection volume of water injection wells. The blockages that cause oil layer pollution mainly come from two aspects, internal and external, that is, the change of the oil layer itself and the intrusion of foreign pollutants. Plugging removal technology is an important method to restore the seepage capacity of the oil layer and improve the production of the oil well. [0003] The existing plugging removal technologies are mainly divided into two categories: chemical plugging removal and physical plugging removal. Chemical plugging removal has been widely used because it does not require special construction eq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/528C09K8/524
CPCC09K8/524C09K8/528
Inventor 胡成亮韩项勇陈建光王兴伟宋玉文饶富培李倩何丕祥季庆荣
Owner PETROCHINA CO LTD
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