Cross-linking agent for carboxymethyl guar gum acidic fracturing fluid and preparation method thereof

A technology of carboxymethyl guar gum and fracturing fluid, which is applied in the field of cross-linking agents, can solve the problems of reduced performance of additives, easy adsorption, affecting the effect of fracturing reconstruction, etc., so as to avoid secondary precipitation and change the wettability of rocks. Effect

Active Publication Date: 2012-01-25
西安长庆化工集团有限公司 +1
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ② The matching is mainly cationic additives, which are prone to adsorption, causing changes in the wettability of formation rocks and degradation of additive pe

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Embodiment 1: The following materials are proportioned according to parts by weight:

[0032] 132 parts of aluminum chloride

[0033] Ethylene glycol 100 parts

[0034] Triethanolamine 50 parts

[0035] 200 parts of acetic acid

[0036] Mancini base corrosion inhibitor 10 parts

[0037] After proportioning each material according to the above-mentioned ratio, it is realized through the following steps:

[0038] Add ethylene glycol into a closed container with a stirrer, start the stirrer, slowly add aluminum chloride, stir for 30 minutes, then raise the temperature to 80°C and add triethanolamine, keep this temperature for 3 hours and then cool to 50°C , add organic acid, keep the temperature for reaction for 1 hour, then add corrosion inhibitor and react for 30 minutes to form orange-brown homogeneous liquid, which is the cross-linking agent of carboxymethyl guar acidic fracturing fluid.

Example Embodiment

[0039] Embodiment 2: The following materials are proportioned according to parts by weight:

[0040] 132 parts of aluminum chloride

[0041] Ethylene glycol 150 parts

[0042] 60 parts of triethanolamine

[0043] 250 parts of acetic acid

[0044] Mancini base corrosion inhibitor 10 parts

[0045] After proportioning each material according to the above-mentioned ratio, it is realized through the following steps:

[0046] Add ethylene glycol in a closed container with a stirrer, start the stirrer, slowly add aluminum chloride, stir for 45 minutes, then raise the temperature to 90°C and add triethanolamine, keep this temperature for 3 hours and then cool to 60°C , add organic acid, keep the temperature for 1.25 hours to react, then add corrosion inhibitor to react for 30 minutes to form orange-brown homogeneous liquid, which is the cross-linking agent of carboxymethyl guar gum acidic fracturing fluid.

Example Embodiment

[0047] Embodiment 3: The following materials are proportioned according to parts by weight:

[0048] 132 parts of aluminum chloride

[0049] Ethylene glycol 200 parts

[0050] 70 parts of triethanolamine

[0051] 300 parts of acetic acid

[0052] Mancini base corrosion inhibitor 10 parts

[0053] After proportioning each material according to the above-mentioned ratio, it is realized through the following steps:

[0054] Add ethylene glycol into a closed container with a stirrer, start the stirrer, slowly add aluminum chloride, stir for 60 minutes, then raise the temperature to 100°C and add triethanolamine, keep this temperature for 3 hours and then cool to 70°C , add organic acid, keep the temperature for 1.5 hours to react, then add corrosion inhibitor to react for 30 minutes to form orange-brown homogeneous liquid, which is the cross-linking agent of carboxymethyl guar acid fracturing fluid.

[0055] Adopt the cross-linking agent that embodiment 2 makes, detect accord...

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 a cross-linking agent for carboxymethyl guar gum acidic fracturing fluid and a preparation method thereof. At present, water-based fracturing fluid is preferably selected for the fracturing of most of reservoir beds at home and abroad, so that the fracturing reconstruction effect is greatly influenced, particularly the reservoir bed is greatly damaged by an alkali-sensitive stratum. The cross-linking agent consists of 132 parts of aluminum chloride, 100-200 parts of ethylene glycol, 50-70 parts of triethanolamine, 200-300 parts of acetic acid and 10 parts of corrosion inhibitor. The preparation method comprises the following steps of: adding the ethylene glycol in a closed container with a stirrer; starting the stirrer; slowly adding the aluminum oxide; then stirring for 30-60 minutes; heating to 80-100 DEG C; adding the triethanolamine; keeping the temperature to react for 3 hours; then cooling to 50-70 DEG C; adding organic acid; keeping the temperature to react for 1-1.5 hours; and then adding the corrosion inhibitor to react for 30 minutes to form brownish yellow homogeneous phase fluid. The fracturing fluid formed by the cross-linking agent and a thickening agent is of an anionic system, so that an additive is prevented from being adsorbed to the stratum; and thus, the wettability of rock is changed, and the implementation of the performance of the additive in the stratum is realized.

Description

technical field [0001] The invention relates to a crosslinking agent for carboxymethyl guar gum acidic fracturing fluid and a preparation method thereof. Background technique [0002] Due to the reliability and economy of the technology, water-based fracturing fluids are mainly used in the fracturing of most reservoirs at home and abroad, and Changqing Oilfield is no exception. Conventional water-based fracturing fluids mainly use the alkaline cross-linking system of guar gum series, which has the following deficiencies: [0003] ① The pH value of the system is high, and there is potential formation damage after encountering formation ions; [0004] ② The matching is mainly cationic additives, which are prone to adsorption, causing changes in the wettability of formation rocks and degradation of additive performance; [0005] ③The system is highly acidic and can partially acidify the formation. [0006] The above factors greatly affect the effect of fracturing, especiall...

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
IPC IPC(8): C09K8/74
Inventor 杜彪杨海燕丁里万华杨继刚赵燕红吕俊华薛小佳叶智胡鹏飞窦淼李鹏郭军曹红艳李强程芳
Owner 西安长庆化工集团有限公司
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