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A temperature-resistant iron ion stabilizer used in acidizing solution

A technology of iron ion stabilizer and acidizing fluid, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of limited concentration of complexed iron ions, resistance to high temperature, etc., prevent Fe3+ precipitation from damaging the formation, overcome The effects of high temperature resistance and high concentration of complexed iron ions

Inactive Publication Date: 2016-03-02
钱程
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Including complexing agent, PH value regulator, reducing agent and other combinations, it overcomes the defects of low temperature resistance and limited concentration of complexed iron ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0029] Solid preparation A comprises the following components by weight percentage:

[0030] 40% iso-Vc acid with a purity of 99%

[0031] Citric acid 55% with a purity of 99%

[0032] Hydroxylamine Hydrochloride 5% with a purity of 97%

[0033] The preparation A was put into actual production and use, under the condition of 120°C and 15MPa, after 24 hours, no iron ion precipitation was seen in the acid solution.

[0034] The preparation A was put into actual production and use. Under the condition of 155°C and 15MPa, after 24 hours, no iron ion precipitation was found in the acid solution.

Embodiment 2

[0036] Solid preparation B comprises the following components by weight percentage:

[0037] Sodium iso-Vc with a purity of 99% 32%

[0038] 58% citric acid with a purity of 99%

[0039] Hydroxylamine Hydrochloride 10% with a purity of 97%

[0040] The formulation A was put into actual production and use, and under the condition of 120°C and 15MPa, no iron ion precipitation was seen in the acid solution after 24 hours.

[0041] The formulation A was put into actual production and used. Under the condition of 155° C. and 15 MPa, after 24 hours, no iron ion precipitation was seen in the acid solution.

Embodiment 3

[0043] Solid preparation C comprises the following components by weight percentage:

[0044] Sodium iso-Vc with a purity of 99% 36%

[0045] Citric acid 56% with a purity of 99%

[0046] Hydroxylamine Hydrochloride 8% with a purity of 97%

[0047] The formulation A was put into actual production and use, and under the condition of 120°C and 15MPa, no iron ion precipitation was seen in the acid solution after 24 hours.

[0048] The formulation A was put into actual production and used. Under the condition of 155° C. and 15 MPa, after 24 hours, no iron ion precipitation was seen in the acid solution.

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PUM

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Abstract

The invention discloses a temperature-resistant iron ion stabilizer used in acidification liquid, which comprises the following components: iso-Vc acid and / or iso-Vc sodium, citric acid, hydroxylamine hydrochloride or sodium diethylenetriaminepentaacetate. It overcomes the defects of high temperature resistance and limited concentration of complexed iron ions.

Description

technical field [0001] The invention relates to the technical field, in particular to a temperature-resistant iron ion stabilizer used in acidizing liquid. Background technique [0002] At present, the acidizing treatment of oil and water wells in oilfields at home and abroad uses the chemical dissolution of acid liquid to dissolve rock minerals and blockages in the formation, dredge the pore throat passages in the formation, restore and improve the permeability of the formation, and reduce the resistance of oil flow into the well or Water injection resistance, so as to achieve the purpose of increasing production of oil wells and increasing injection of water wells. During the acidizing operation of oil and water wells, the high-concentration acid solution will dissolve the iron compounds on the surface of the pipeline and equipment during the stirring and pumping process, and will erode the iron minerals and clay minerals in the rock after entering the formation. etchant,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/74
CPCC09K8/74
Inventor 钱程钱桥胜张秀霞谢名璐
Owner 钱程
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