A kind of organic titanium crosslinking agent and its preparation method and application

A technology of cross-linking agent and organic titanium, which is applied in the field of organic titanium cross-linking agent and its preparation, can solve the problems of cross-linking influence of boron component, uncontrollable cross-linking, large influence of cross-linking, etc., to achieve shielding cross-linking reaction, Strong sand-carrying performance and high temperature resistance

Active Publication Date: 2020-12-11
昆山京昆油田化学科技有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the organic boron cross-linking system is used for flowback fluid distribution fracturing, and the pH value of the formed fracturing fluid jelly cannot be adjusted by alkalinity and the crosslinking cannot be controlled due to formation water calcium, magnesium ions and residual boron components in the flowback fluid , resulting in the problem that the fracturing construction cannot be carried out smoothly
For example, in the prior art, CN103113874A discloses that an organotitanium cross-linking agent is prepared from butyl titanate, triethanolamine and glycerin, which is applied to the flowback hydraulic fracturing fluid system. The problem of crosslinking (pH value has a great influence on the crosslinking of organoboron system, and organotitanium system is generally not considered)

Method used

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  • A kind of organic titanium crosslinking agent and its preparation method and application
  • A kind of organic titanium crosslinking agent and its preparation method and application
  • A kind of organic titanium crosslinking agent and its preparation method and application

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preparation example Construction

[0020] The invention provides a preparation method of an organic titanium crosslinking agent, comprising the following steps:

[0021] Under airtight conditions, tetraisopropyl titanate, sodium gluconate, glycerin and triethanolamine are mixed for a complexation reaction to obtain a complexation liquid;

[0022] The complex solution is mixed with water to obtain the organic titanium crosslinking agent.

[0023] In the invention, under airtight conditions, tetraisopropyl titanate, sodium gluconate, glycerin and triethanolamine are mixed for complexation reaction to obtain complexation liquid. In the present invention, the mass ratio of tetraisopropyl titanate, sodium gluconate, glycerol and triethanolamine is preferably 2.5-5.0:0.05-0.1:10-50:5-10, more preferably 3-4.5: 0.06~0.1:20~40:6~8.

[0024] In the present invention, the temperature of the complexation reaction is preferably 60-80°C, more preferably 70-75°C, and the time of the complexation reaction is preferably 60-1...

Embodiment 1

[0036] At room temperature, add tetraisopropyl titanate, sodium gluconate, glycerin, and triethanolamine into the flask in sequence according to the following ratio (weight ratio) = 2.5:0.05:10:5, and then put the flask into 60 In the constant temperature device at ℃, stir the materials in the flask under airtight conditions for 60 minutes. After the complexation reaction is complete, the complexation liquid turns yellow. Add pure water with the total weight of the complexing solution into the flask, and stir for 60 min at a temperature of 60°C. After the stirring is completed, a light yellow transparent organotitanium crosslinking agent is obtained.

[0037] The organotitanium crosslinking agent prepared in the present embodiment is analyzed for particle size, and the results are as follows: figure 1 shown by figure 1 It can be seen that the diameter of the organotitanium crosslinking agent prepared in this embodiment is 10 -1 The mass content of the small-sized titanium co...

Embodiment 2

[0040]At room temperature, add tetraisopropyl titanate, sodium gluconate, glycerin, and triethanolamine into the flask in sequence according to the following ratio (weight ratio) = 5:0.1:50:1, and then put the flask into 80 In the constant temperature device at ℃, stir the materials in the flask under airtight conditions for 120 minutes. After the complexation reaction is complete, the complexation liquid turns yellow. Add pure water with the total weight of the complexing solution into the flask, and stir for 60 min at a temperature of 60°C. After the stirring is completed, a light yellow transparent organotitanium crosslinking agent is obtained.

[0041] The organic titanium crosslinking agent prepared in this example is used in the fracturing fluid system for natural gas well gas production sewage, the volume ratio of organic titanium crosslinking agent and natural gas well gas production sewage base fluid system is 0.4-0.5%, The connection time is about 2 minutes, and can ...

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Abstract

The invention provides a preparation method of an organic titanium cross-linking agent and belongs to the field of organic cross-linking agents. The preparation method comprises the following steps: under a sealed condition, mixing tetraisopropyl titanate, sodium gluconate, glycerinum and triethanolamine to carry out a complexation reaction so as to obtain complexation liquor; mixing the complexation liquor with water, thereby obtaining the organic titanium cross-linking agent. According to the preparation method, as a non-chelating agent, the sodium gluconate cooperates with the triethanolamine to form organic titanium ligand, in addition, the sodium gluconate can be also subjected to the complexation reaction with boron, cross-linking reactions of a boron element with polysaccharide canbe effectively shielded, and the influence of a boron component to cross-linking can be alleviated; water is adopted as a solvent, and a homogeneous aqueous cross-linking agent can be prepared throughreactions and dissolution. Meanwhile, the prepared organic titanium cross-linking agent can be applied to neutral cross-linking conditions, and the influence of high-content ions such as calcium andmagnesium upon the pH value of gel can be completely avoided.

Description

technical field [0001] The invention relates to the technical field of organic crosslinking agents, in particular to an organic titanium crosslinking agent and its preparation method and application. Background technique [0002] Fracturing fluid flowback fluid has the characteristics of complex composition, high salinity, high turbidity, etc., and needs to be treated after formation flowback. At present, a new and simple treatment method is to simply treat the flowback fluid through an organoboron cross-linking system and then mix the fluid before fracturing fluid construction, which can not only effectively relieve the flowback fluid discharge and storage pressure, save resource costs, but also partially solve Water source issues for fracturing operations. However, the organic boron cross-linking system is used in flowback fluid distribution fracturing, and the pH value of the formed fracturing fluid jelly cannot be adjusted by alkalinity and the crosslinking cannot be co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/685C09K2208/10
Inventor 何建平宫大军邓明宇吴志明朱明山王军民周利英张明华王雪稳
Owner 昆山京昆油田化学科技有限公司
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