Organoantimony crosslinking agent and its preparation method and cleaning fracturing fluid

A technology of cross-linking agent and organic antimony, which is applied in the field of organic antimony cross-linking agent and its preparation, and clean fracturing fluid, which can solve problems such as difficult to solve the performance requirements of construction-scale fracturing fluid, restrictions on wide application, and impact on fracturing effects , to achieve the effect of controlling the crack height, uniform sanding, and no protrusion in the rheological curve

Active Publication Date: 2019-07-26
陕西延长石油(集团)有限责任公司(延长油矿管理局)油气勘探公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like many other water-based fracturing fluids, hydroxypropyl guar gum (HPGF) still has inevitable defects: first, it cannot quickly swell and hydrate, and the dissolution rate is slow, so it is difficult to solve the problem of construction scale and rapid gel-breaking return. The contradiction between the performance requirements of the fracturing fluid is eliminated; the second is that the vegetable glue fracturing fluid often has a lot of residue after the gel is broken, which is easy to block the filling layer of the fracture, causing secondary damage and affecting the fracturing effect; the third is that the plant glue Natural polymers such as gelatin cellulose have poor temperature resistance and are easy to biodegrade. Can meet the well construction below 80 degrees
The filtration loss in the formation is serious, and the cost is high, which also limits its wide application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Organoantimony crosslinking agent and its preparation method and cleaning fracturing fluid
  • Organoantimony crosslinking agent and its preparation method and cleaning fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] Another embodiment of the present invention proposes a preparation method of an organic antimony crosslinking agent, which includes the following steps:

[0056] 1) Synthesis of polyol antimonate: add sorbitol in isopropanol solvent, add antimony trichloride dropwise with stirring at 20°C-30°C, pass through ammonia gas to react for 90-120min, after the reaction, filter and distill , refined to obtain polyol antimonate;

[0057] 2) Add the polyol antimonate to triethanolamine under stirring state, react at 120-150° C. for 60-90 minutes, distill and refine after the reaction to obtain an organic antimony cross-linking agent.

[0058] The weight ratio of isopropanol, sorbitol, antimony trichloride and triethanolamine in the preparation method of the organic antimony crosslinking agent in the embodiment of the present invention is 50-70:10-30:5-10:10-30.

[0059] The dropping time of antimony trichloride in the preparation method of the organic antimony crosslinking agent ...

Embodiment 1

[0073] 1) Synthesis of polyol antimonate: Add 68g of sorbitol into 240g of isopropanol solvent, add 32g of antimony trichloride dropwise with stirring at 30°C, the antimony trichloride is added dropwise within 20min, and then pass through ammonia gas, React at 30°C for 120 minutes. After the reaction, remove ammonium chloride by filtration, and the filtrate is distilled and refined to obtain triethanolamine polyol antimonate crosslinking agent, which is polyol antimonate;

[0074] 2) Add the above-mentioned polyol antimonate to 60 g of triethanolamine under stirring, and react at 140° C. for 90 min. After the reaction, distill and refine to obtain an organic antimony crosslinking agent.

Embodiment 2

[0076] 1) Synthesis of polyol antimonate: Add 14g of sorbitol to 122g of isopropanol solvent, add 16g of antimony trichloride dropwise with stirring at 25°C, the antimony trichloride is added dropwise within 20min, and ammonia gas is passed in, React at 30°C for 90 minutes. After the reaction, remove ammonium chloride by filtration, and the filtrate is distilled and refined to obtain triethanolamine polyol antimonate crosslinking agent, which is polyol antimonate;

[0077] 2) Add the polyol antimonate to 48 g of triethanolamine under stirring, react at 120° C. for 70 min, distill and refine after the reaction to obtain an organic antimony crosslinking agent.

[0078] The organic antimony crosslinking agent in the clean fracturing fluid components of Examples 3-6 is the organic antimony crosslinking agent prepared in Example 1. Table 1 shows the components of the clean fracturing fluids of Examples 3-6.

[0079] The composition (percentage by weight) of the clean fracturing fl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an organic antimony cross-linking agent, a preparation method of the organic antimony cross-linking agent and clean fracturing fluid. The clean fracturing fluid comprises the following ingredients (by weight percentage): 0.18-0.30% of low molecular weight polymer, 0.3-0.5% of organic antimony cross-linking agent, 0.2% of cleanup additive, 0.3% of clay stabilizer, 0.01-0.02% of gel breaker and the balance of water, wherein the percentage sum of the above ingredients is 100%. According to the clean fracturing fluid, since an antimony group is introduced into a polymer molecule, the temperature tolerance of the fracturing fluid is obviously improved; the fracturing fluid still can keep higher viscosity even at 180 DEG C; in addition, after the gel breaker is added; no water insoluble matter is available; the clean fracturing fluid is an ideal clean fracturing fluid system, is low in cost, low in friction resistance, easy to regulate and simple to prepare and has shear resistance; and the construction is safe and reliable.

Description

technical field [0001] The invention relates to an organic antimony crosslinking agent, in particular to an organic antimony crosslinking agent, a preparation method thereof and a cleaning fracturing fluid. Background technique [0002] At present, domestic oilfield hydraulic fracturing construction basically adopts polymer fracturing fluid technology, that is, guar gum and its derivatives used in water-based polymer fracturing fluid, because of its good rheological control characteristics, It has been used in fracturing fluids for many years. However, like many other water-based fracturing fluids, hydroxypropyl guar gum (HPGF) still has inevitable defects: first, it cannot quickly swell and hydrate, and the dissolution rate is slow, so it is difficult to solve the problem of construction scale and rapid gel-breaking return. The contradiction between the performance requirements of the fracturing fluid is eliminated; the second is that the vegetable glue fracturing fluid of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/685C09K2208/26
Inventor 董晓军张明王帅蒲阳峰罗立锦高利军段萍于永
Owner 陕西延长石油(集团)有限责任公司(延长油矿管理局)油气勘探公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap