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Self-gel-breaking fiber fracturing fluid as well as preparation method and application thereof

A fracturing fluid and fiber technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as the influence of fracturing effect, reduce the volume of fracturing fluid reformation, etc., so as to shorten the fracturing construction period and improve the pressure The effect of cracking, expanding the transformation volume

Active Publication Date: 2021-09-28
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most unconventional reservoirs have natural fractures. If diverting fracturing technology is not adopted, a large amount of fracturing fluid will preferentially enter the natural fractures, reducing the volume of fracturing fluid stimulated and adversely affecting the fracturing effect.

Method used

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  • Self-gel-breaking fiber fracturing fluid as well as preparation method and application thereof
  • Self-gel-breaking fiber fracturing fluid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a self-breaking fiber compactment, wherein the self-breaking fiber compactment is prepared by means of a method comprising the specific step:

[0037] 300 ml of deionized water was added to the high mixture, and 3 g of potassium formate, 0.06 g of the capsule type breakage and 3 g of degradable fibers were added to the high mixture, and the base fluid was obtained after stirring for 20 minutes.

[0038] Further, a 0.3 g of Gemini quaternary ammonium salt viscoelastic surfactant produced by 0.3 g of Henan Road Pure Chemical Technology Co., Ltd. was added, and the high-speed stirrer was stirred at 11000 r / min for 10 min Since the self-breaking fibers;

[0039] Among them, the capsule type breakage of the capsule ingredients are chitosan produced by Shandong Aokang Biotechnology Co., Ltd., and the capsule is potassium permanganate;

[0040] The degradable fiber is a polylactic acid fiber having a molecular weight produced by Wuhan Yisheng Biotechnolo...

Embodiment 2

[0042] This embodiment provides a self-breaking fiber compactment, wherein the self-breaking fiber compactment is prepared by means of a method comprising the specific step:

[0043] 300 ml of deionized water was added to the high mixture, and 4 g of potassium formate, 0.09 g of the capsule type breakage and 4 g of degradable fibers were added to the high mixture, and the base fluid was obtained after stirring for 20 minutes.

[0044] Further, 0.5 g of 0.5 g of a polysaccharide viscoelastic surfactant formed of sodium hexaalkyl sulfonate and hydroxyethyl cellulose is added, and the mixer is stirred at 11000 r / min at a rotational speed of 11000 r / min for 10 min. The self-detergent fiber compact is made;

[0045] Among them, the capsule type breakage of the capsule ingredients are chitosan produced by Shandong Aokang Biotechnology Co., Ltd., and the capsule is potassium permanganate;

[0046] The degradable fiber is a medium-high viscosity polycarbonate fiber having a molecular we...

Embodiment 3

[0048] This embodiment provides a self-breaking fiber compactment, wherein the self-breaking fiber compactment is prepared by means of a method comprising the specific step:

[0049] 300 ml of deionized water was added to the high mixture, and 6.0 g of potassium formate, 0.09 g of a capsule type breakage agent and 4.5 g of degradable fibers were added to the high stirup, and the base fluid was obtained after stirring for 20 minutes.

[0050] Further, 0.6 g of the oleo-propyl dimethylamine tertiary amine nonionic surfactant produced by Shanghai Silong New Material Technology Co., Ltd. was added to the base liquid, and the mixer was stirred at 11000 R / min at a rotational speed of 11000 R / min after 10min. Advantages of the self-breaking fiber fracture;

[0051] Among them, the capsule type breakder's cystic content is a poly beta-hydroxybutyrate (Sichuan Zhizheng Technology Co., Ltd.), and the capsule is potassium sulfate;

[0052] The degradable fiber is a polylactic acid fiber ...

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Abstract

The invention provides a self-gel-breaking fiber fracturing fluid as well as a preparation method and application thereof. The self-gel-breaking fiber fracturing fluid is prepared from the following components in parts by weight: 100 parts of water, 0.05 to 0.20 part of a surface active thickening agent, 0.5 to 2.0 parts of anti-swelling agent, 0.01 to 0.03 part of a capsule type gel breaker and 0.3 to 1.5 parts of a degradable fiber. The self-gel-breaking fiber fracturing fluid provided by the invention is suitable for diverting fracturing transformation of a natural fracture development reservoir, has good shielding and temporary plugging capability, can divert the fracturing fluid to more ground waves and low-permeability production layers, and improves transformation effect; and meanwhile, the preparation method of the self-gel-breaking fiber fracturing fluid is simple, a fracturing process can be simpler due to the self-gel-breaking characteristic of the self-gel-breaking fiber fracturing fluid, and a fracturing construction period can be shortened.

Description

Technical field [0001] The present invention relates to a self-breaking fiber compactment and its preparation method and application thereof, belonging to the field of petrochemical technology. Background technique [0002] It is difficult to form an industrial oil gant stream such as unconventional reservoir, poorly reservoir, and insufficient porosity. It is difficult to form industrial oil flow. In order to improve the yield of such reservoirs, the fracturing process is generally used, so that the formation produces artificial cracks, and communicates the seepage passage between the formation to the wellbore. Most of the reservoirs develop natural cracks. If no steering fracturing technology, a large amount of fracturing fluid will give priority to natural cracks, reduce the volume of fracturing fluid, and an adverse effect on fracturing effect. [0003] Therefore, there is a new type of self-breaking glue fiber compact fluid and its preparation method and application have bec...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/90C09K8/88
CPCC09K8/68C09K8/905C09K8/885C09K2208/26
Inventor 杨睿月周一粟史怀忠王双威丛日超温海涛侯磊
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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