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A kind of microfoam acid solution and preparation method thereof

A foam acid solution and mass fraction technology, applied in the field of foam acid, can solve the problems of low compressive plugging strength, high construction equipment cost, plugging and steering failure, etc., to simplify construction equipment and procedures, reduce formation damage, and increase The effect of stress resistance

Active Publication Date: 2020-03-27
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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Problems solved by technology

[0015] To sum up, the problems existing in the existing technology are: foams are easy to gather, low in strength, easy to break in structure, and poor in stability; Equipment, construction equipment costs are high, and the process is relatively complicated; it is limited for deep wells and high-pressure wells

Method used

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  • A kind of microfoam acid solution and preparation method thereof
  • A kind of microfoam acid solution and preparation method thereof
  • A kind of microfoam acid solution and preparation method thereof

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] On the basis of fully researching and comparing the properties of foam acid and other acid liquids, and the understanding of the mechanism causing these differences, the present invention begins to think about which method to take to form a new acid liquid, which has some excellent characteristics of foam, such as It has important characteristics such as high viscosity, high energy, low gravity, and slow acid rock reaction, and at the same time has most of the characteristics of conventional acid liquids, such as water solubility, acid reaction, and compatibility with acidifying additives. Through the analysis of the...

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Abstract

The invention belongs to the technical field of foam acid and discloses microfoam acid liquid, constitution of a compound foaming agent of the microfoam acid liquid and a preparation method of the microfoam acid liquid. The microfoam acid liquid contains the following components in percentage by mass (100% in total): 10%-25% of HCl (hydrochloric acid), 0.36% of SDJR-2 (compound foaming agent), 0.24% of SBW-101 (foam stabilizer), 0.2% of FS3802 (thickening agent) and the balance of water, wherein the compound foaming agent SDJR-2 contains 55.56% of an FBM-5-2 foaming agent and 44.44% of an AK-304 foaming agent. The microfoam acid liquid has good properties of foaming, foam stabilization, viscosity maintenance, acid rock reaction retardance, temperature resistance, salt resistance, oil resistance, sand carrying and the like; by observing through an optical microscope, the microstructure and size of the microfoam acid liquid meet the dimensional requirement of microfoams; experimental evaluation shows that the microfoam acid liquid is a novel acid liquid system with excellent performance and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of foam acid, and in particular relates to a microfoam acid solution, a composition of a compound foaming agent and a preparation method thereof. Background technique [0002] After entering the 21st century, many oilfields at home and abroad have entered the middle and late stages of development after decades of development, and some new development problems have emerged, such as the high-permeability layer has been fully developed, while the adjacent low-permeability layer has poor physical properties. , Weak flow capacity, serious lack of development, or even almost no development, which further increases the contradiction between layers, so that the water cut in oilfield production is getting higher and higher, reaching more than 98%, which reduces the comprehensive development level. Some temporary plugging measures for profile control have been implemented, among which foam acid has the characteristics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508C09K8/518C09K8/74C09K8/88C09K8/94
CPCC09K8/508C09K8/518C09K8/74C09K8/88C09K8/94
Inventor 蒋建方林梅钦许晓廉静怡黄勇熊婷仇晓丽
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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