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Horizontal well acidizing-based phase-state transformation acid

A horizontal well and phase state technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as difficulty in meeting the requirements of horizontal well acidizing construction, achieve good phase state variable, controllable and uniform transformation, good adaptability

Active Publication Date: 2012-08-15
青海国海能源环境有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used acidizing fluid systems are difficult to meet the requirements of horizontal well acidizing construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Prepare 4000 grams of the present invention, its preparation method is as follows:

[0013] Preparation of the gel-forming component: by 3.0g acrylamide, 2.72g 2-acrylamido-sodium methylpropane sulfonate, 11.4g methacryloxyethyltrimethyl ammonium chloride, 2.88g dimethyl diene Propyl ammonium chloride is copolymerized to obtain 20.0 g of the finished product;

[0014] Preparation of conversion agent: 14.0g of finished product composed of 5.0g of zirconium oxychloride and 9.0g of glycerin;

[0015] Preparation of corrosion inhibitor: 3.04g fatty alcohol polyoxyethylene ether, 2.2g nonylphenol polyoxyethylene ether, 23.74g aldehyde ketone amine condensate, 6.72g pyridine quaternary ammonium salt and 4.3g acetylene alcohol mixed to obtain Finished product 40.0g;

[0016] Preparation of colloidal dispersant: 8.0g ammonium persulfate and 4.0g hydrogen peroxide to form 12.0g of finished product;

[0017] Weigh 1274.0g of water, 2640.0g of hydrochloric acid with a concentra...

Embodiment 2

[0019] Prepare 2500 grams of the present invention, and its preparation method is as follows:

[0020] Preparation of gel-forming components: by 3.375g acrylamide, 3.06g 2-acrylamido-sodium methylpropane sulfonate, 12.825 methacryloxyethyltrimethylammonium chloride, 3.24g dimethyldiallyl Ammonium chloride copolymerized to obtain finished product 22.5g;

[0021] Preparation of conversion agent: it is composed of a mixture of 1.35g of zirconium oxychloride and 1.83g of titanium tetrachloride, 1.575g of mannitol, 9.42g of ethylene glycol, and 0.825g of oxalic acid to obtain 15.0g of finished product;

[0022] Preparation of corrosion inhibitor: 1.9g fatty alcohol polyoxyethylene ether, 1.375g nonylphenol polyoxyethylene ether, 14.838g aldehyde ketone amine condensate, 4.2g pyridine quaternary ammonium salt and 2.687g acetylene alcohol mixed to obtain Finished product 25.0g;

[0023] Preparation of colloidal dispersant: 2.5g of potassium persulfate constitutes 2.5g of finished p...

Embodiment 3

[0026] Prepare 1000 grams of the present invention, its preparation method is as follows:

[0027] Preparation of the gel-forming component: by 1.8g acrylamide, 1.632g 2-acrylamido-sodium methylpropanesulfonate, 6.84g methacryloyloxyethyltrimethyl ammonium chloride, 1.728g dimethyl diene Propyl ammonium chloride is copolymerized to obtain 12.0 g of the finished product;

[0028] Preparation of conversion agent: It is composed of 1.85g of titanium tetrachloride, 0.67g of glycerin, 1.13g of sorbitol, 0.33g of malonic acid, 0.74g of lactic acid, 1.26g of ethanolamine, and 4.02g of formaldehyde. 10.0 g of finished product was obtained.

[0029] Preparation of corrosion inhibitor: 3.04g fatty alcohol polyoxyethylene ether, 2.2g nonylphenol polyoxyethylene ether, 23.74g aldehyde ketone amine condensate, 6.72g pyridine quaternary ammonium salt and 4.3g acetylene alcohol mixed to obtain Finished product 40.0g;

[0030] Preparation of colloidal dispersant: 0.2g of ammonium persulfat...

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Abstract

The invention belongs to the field of oilfield development technology, and particularly relates to an acidizing system which is used for increasing production and injection of a horizontal well and has controllable phase-state transformation, which comprises the raw materials in parts by weight: 0.5-1.2 parts of glue formation component, 0.3-1.0 part of conversion agent, 0.01-0.3 part of colloid dispersing agent, 0.5-4.0 parts of corrosion inhibitor, 38.6-66.7 parts of acid and 26.8-60.1 parts of water. The acidizing system has good performances of phase-state transformation, controllable conversion and even acid distribution, and has the advantage of good adaptability for the horizontal well.

Description

technical field [0001] The invention belongs to the technical field of oil field development, and in particular relates to an acidizing system for increasing production and injection of horizontal wells and controlling phase transformation. Background technique [0002] In oil and gas exploration and development, acidizing is widely used in the reservoir stimulation of oil wells and natural gas wells to achieve the purpose of increasing oil and gas production. During the acidizing construction, it is always hoped that all the target layers of the acidizing can be reformed and treated. Restrictions, often had to be left unchecked, natural selection. Especially for horizontal wells, due to their own well conditions and structural characteristics, the inhomogeneity of acid feeding is more prominent. Currently commonly used acidizing fluid systems are difficult to meet the requirements of horizontal well acidizing construction. It is necessary to develop an acidizing fluid th...

Claims

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Application Information

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IPC IPC(8): C09K8/74
Inventor 张春雨姚佩峰张胜宋峰张如忠
Owner 青海国海能源环境有限公司