Organic boron zirconium crosslinking agent

Abstract

The invention provides an organic boron zirconium crosslinking agent, belonging to the technical field of oilfield fracturing fluids. In order to solve the problem that the existing organic boron zirconium crosslinking agent prepared from the expensive organic zirconium complex enhances the raw material cost of the organic boron zirconium crosslinking agent and lowers the economic benefit, the invention provides an organic boron zirconium crosslinking agent which comprises the following components in parts by weight: 1 part of inorganic zirconium salt, 2-4 parts of water, 3-6 parts of isopropanol, 0.4-1 part of inorganic boride, 4-20 parts of methanol, 2-4 parts of polyalcohol, 1-2 parts of sodium alpha-hydroxycarboxylate, 1-2 parts of triethanolamine and 0.5-1 part of tetrahydroxypropyl ethylenediamine. By using the cheap inorganic zirconium salt as the raw material, the organic boron zirconium crosslinking agent provided by the invention greatly saves the cost, and is beneficial to marketization of the organic boron zirconium crosslinking agent and wide application in the high-temperature-resistant fracturing fluid system.

Description

technical field [0001] The invention relates to oilfield fracturing fluid technology, in particular to an organoboron-zirconium crosslinking agent used in a high-temperature resistant fracturing fluid system. Background technique [0002] Oilfield fracturing technology is a major measure for oil and gas well stimulation, and it is widely used in various oilfields. It uses ground high-pressure pumps to pump fracturing fluid into the formation with a displacement that greatly exceeds the absorption capacity of the formation, forming cracks in the formation, improving the conductivity of oil and gas layers, and achieving the purpose of increasing production. [0003] Fracturing fluids have undergone tremendous evolution since they were first used to stimulate fractures in 1947. The early fracturing fluid was to add viscous fluid enough to open and extend fractures to gasoline; later, with the increase of well depth and well temperature, higher requirements were put forward for...

AI Technical Summary

Problems solved by technology

However, due to the high price of organic zirconium complexes, the raw material cost of organic boron zirconium crosslinking agent is high, which further reduces the economic benefits of oil field fracturing

[0008] In addition, in order to improve the temperature and shear resistance of organoboron-zirconium crosslinking agents in high-temperature fracturing fluid systems, some organoboron-zirconium crosslinking The market production of the agent brings certain difficulties; the preparation of some organoboron-zirconium crosslinking agents needs to be divided into multiple steps (for example, the organoboron crosslinking agent and the organozirconium crosslinking agent are synthesized separately and then compounded obtain organoboron-zirconium crosslinking agent), and there is also the separation process of intermediates, the operation procedures are cumbersome, time-consuming, and the production efficiency is low

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