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Fracturing fluid for enhanced oil recovery

A fracturing fluid and recovery factor technology, applied in the field of fracturing fluids, can solve the problems of long swelling time, difficult to satisfy, many types and large amounts of additives, etc., and achieves the advantages of reducing the construction period of a single well, short swelling time, and simplifying the preparation process. Effect

Active Publication Date: 2018-06-26
大庆市华瑞信化工助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is to overcome the existing system existing in the background technology, when preparing at high speed, there are many types of additives, a large amount of foam is generated, and the swelling time is long and it is difficult to meet the requirement of 12m 3 / min above the problem of high-displacement construction demand, and to provide a fracturing fluid for enhanced oil recovery

Method used

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  • Fracturing fluid for enhanced oil recovery
  • Fracturing fluid for enhanced oil recovery
  • Fracturing fluid for enhanced oil recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 0.75g of thickener, 0.1g of alkyl polyglycoside, and 0.15g of potassium persulfate into 499g of water for preparation, and stir at 400r / min for 3min to obtain the fracturing fluid system.

Embodiment 2

[0030] Weigh 4g of thickener, 0.5g of alkyl polyglycoside, and 0.2g of capsule breaker into 495.3g of water for preparation, and stir for 3min at 400r / min to obtain the fracturing fluid system.

Embodiment 3

[0032] Weigh 5g of thickener, 0.75g of alkyl polyglycoside, 0.25g of potassium persulfate, and 0.08g of ammonium persulfate into 493.92g of water, and stir at 400r / min for 3min to obtain the fracturing fluid system.

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Abstract

The present invention relates to a fracturing fluid for improving the recovery ratio, which mainly solves the problem in the prior art that an existing system is rich in additive variety to cause a large amount of foams and long swelling time so as to be incapable of meet the high-displacement construction requirement up to over 12 m<3> / min during the high-speed preparation process. The fracturing fluid is characterized by comprising the following components in weight percent: 0.1-1.5% of thickening agent, 0.02-0.15% of biologically active agent, 0.02-0.08% of gel breaker, and water as the balance. During the high-speed dosing process, the fracturing fluid for improving the recovery ratio is free of any foam, short in swelling time and fewer in additive variety. Meanwhile, the in-situ preparation process of the fracturing fluid is simplified, and the high-displacement construction requirement can be met.

Description

technical field [0001] The invention relates to a fracturing fluid in the field of oil recovery, in particular to a fracturing fluid for enhancing recovery. Background technique [0002] The industrial fracturing construction technology has become one of the main technologies for the economical and effective development of tight oil and shale gas. How to realize the rapid and continuous mixing of fracturing fluid systems at the construction site is the key technology for industrial construction. [0003] At present, the commonly used industrial fracturing fluid systems are mainly vegetable gum systems and powdery polymer systems. Vegetable gum system includes thickener, crosslinking agent and other additives. The thickener is usually hydroxypropyl modified guar gum dry powder. Due to different temperatures, the crosslinking agent is organic boron, organic zirconium or borax. The concentration is generally about 0.5%, and its performance meets the general technical indicato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/602C09K8/685C09K8/882C09K2208/26
Inventor 贾连广包树新孙殿海乔兴
Owner 大庆市华瑞信化工助剂有限公司
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