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A kind of strong acid-based surfactant fracturing fluid and fracturing method thereof

A technology of surfactant and fracturing fluid, which is applied in the field of fracturing fluid, can solve problems that have not yet appeared, and achieve the effect of reducing wellhead pressure, reducing construction risk, and simple and convenient construction process

Active Publication Date: 2016-03-16
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, domestic research and application reports on strong acid-based surfactant fracturing fluid systems have not yet appeared, so the development and application of strong acid-based surfactant fracturing fluid technology has a good application prospect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] As a preferred embodiment of this fracturing fluid, the surfactant fracturing fluid of this strong acid comprises the following components by weight:

[0037] Strong acid surfactant fracturing fluid thickener: 6 parts;

[0038] Hydrochloric acid solution: 100 parts;

[0039] The strong acid surfactant fracturing fluid thickener is composed of 40% dichloro(16-18) alkyl dimethyl ethyl ammonium or its derivatives, 20% amino trimethylene phosphoric acid and 40%H 2 O composition mixture, the concentration of described hydrochloric acid solution is 15%.

Embodiment 2

[0041] As the best implementation mode of this fracturing fluid, the surfactant fracturing fluid of this strong acid comprises the following components by weight and forms:

[0042] Strong acid surfactant fracturing fluid thickener: 4-8 parts;

[0043] Hydrochloric acid solution: 100 parts;

[0044] The recyclable surfactant fracturing fluid thickener is composed of 40% dichloro(16-18) alkyl dimethyl ethyl ammonium or its derivatives, 20% amino trimethylene phosphoric acid and 40%H 2 O composition mixture, the mass concentration of described hydrochloric acid solution is 18%.

[0045]In this example, the innovative point of its technology is the development of a strong acid-resistant surfactant fracturing fluid with a temperature resistance greater than 100°C, and it aims to develop a strong acid-resistant liquid thickener to achieve acidification and sand fracturing , developed a matching strong acid-based surfactant fracturing fluid system for Xiagu gas reservoirs, and ex...

Embodiment 3

[0047] As a preferred embodiment of the method, the surfactant fracturing fluid of the strong acid comprises the following steps:

[0048] a, get 4-8 parts of strong acid surfactant fracturing fluid thickener, 100 parts of hydrochloric acid; Eighteen) Alkyl dimethyl ethyl ammonium or its derivatives, 20% amino trimethylene phosphoric acid and 40% H 2 A mixture composed of O;

[0049] B, pass the surfactant fracturing fluid thickener of the strong acid fracturing fluid thickener of the above-mentioned weight part in step a and the hydrochloric acid solution of the above-mentioned weight part together into the sand mixer and directly mix to form the surfactant fracturing fluid of the strong acid;

[0050] c. Hydraulic fracturing of the strong acid surfactant mixed in step b into the fractures opened in the formation of oil and water wells at a temperature of 0°C-150°C;

[0051] d. Shut down the well for 0.5-3.0 hours after fracturing, and control blowout;

[0052] e. The cons...

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PUM

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Abstract

The invention discloses a strong acid-based surfactant fracturing fluid, and relates to the technical field of fracturing fluids used in oil exploitation. The fracturing fluid is formed by mixing the following components in parts by weight: 4-8 parts of a thickening agent of the strong acid-based surfactant fracturing fluid and 100 parts of hydrochloric acid liquor. The thickening agent of the strong acid-based surfactant fracturing fluid is a mixture comprising 20-60% dichlorinated (cetyl-octadecyl) alkyl dimethyl ethylammonium or a derivative thereof, 10-30% amino tri-methylene phosphonic acid and 20-60% H2O. Meanwhile, the invention further provides a fracturing method of the fracturing fluid. The fracturing fluid has the capability of resisting strong acids and the temperature resistance is greater than 100 DEG C. The fracturing fluid has the characteristic of low friction, so that the constructed wellhead pressure can be effectively reduced for deep wells and the construction risk is reduced.

Description

technical field [0001] The invention relates to the technical field of fracturing fluid used in oil exploitation, in particular to a strong acid-based surfactant fracturing fluid technology suitable for carbonatite reservoirs. Background technique [0002] Carbonate low-permeability reservoirs are widely distributed in onshore oilfields and offshore oilfields, such as the Lower Paleozoic Ordovician reservoirs in Changqing Gas Field and Xinjiang Tahe Oilfield, and the Paleozoic reservoirs in Yuanba and Puguang Gas Fields in Sichuan. All reservoirs are carbonate rock reservoirs. With the deepening of exploration and development, a large number of low-permeability reservoirs need large-scale reconstruction to have development value. [0003] For carbonate reservoirs, acid fracturing was mainly used for plugging removal, and the fracture length was short and the conductivity was low; with the deepening of exploration and development, the abundance and grade of carbonate reservoi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/74E21B43/27
Inventor 任雁鹏马托柴巧玲王小文蒋文学荆建春黄超王坤
Owner BC P INC CHINA NAT PETROLEUM CORP
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