Novel temperature-control sand consolidation agent for reaction in reservoir as well as preparation method and application of novel temperature-control sand consolidation agent

An internal reaction and sand-fixing agent technology, which is applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of uncontrollable reaction degree of sand-fixing agent reaction monomer in sand production, etc., and achieve good application effect and application prospect. , The effect of prolonging the pump inspection period and less than the loss of permeability

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of sand production in the process of oil well development and the uncontrollable degree of reaction monomer reaction of sand consolidation agent, the object of the present invention is to provide a new temperature-controlled sand consolidation agent and its

Method used

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  • Novel temperature-control sand consolidation agent for reaction in reservoir as well as preparation method and application of novel temperature-control sand consolidation agent
  • Novel temperature-control sand consolidation agent for reaction in reservoir as well as preparation method and application of novel temperature-control sand consolidation agent
  • Novel temperature-control sand consolidation agent for reaction in reservoir as well as preparation method and application of novel temperature-control sand consolidation agent

Examples

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Example Embodiment

[0019] According to a first aspect of the present invention, the present invention discloses a new method for preparing a new temperature-controlled sand fixing agent reacted within the reservoir, the method comprising:

[0020] In the solvent and alkaline environment, the amino protection reaction between p-phenylenediamine and methyl chloroformate to obtain an intermediate product; then under alkaline conditions, the above intermediate product and formaldehyde solution are synthesized to obtain the final product.

[0021]In the present invention, preferably, the molar ratio of p-phenylenediamine, methyl chloroformate and formaldehyde is 1: 2-2.5: 1-1.3, more preferably 1: 2.2: 1.1.

[0022] In the present invention, preferably, the solvent is dichloroethane, dichloromethane, styrene, trichloroethylene, more preferably dichloroethane or styrene;

[0023] In the present invention, preferably, the base used in the alkaline environment is triethylamine or ammonia, more preferably t...

Example Embodiment

[0030] In accordance with a more specific preferred embodiment, the preparation method of the antiblocking agent specifically comprises the following steps:

[0031] (1) A solvent was added to the reaction kettle, followed by the addition of p-phenylenediamine, methyl chloroformate, triethylamine or ammonia, at a temperature of 70 ~ 80 ° C, stirring speed of 150-250rpm under the condition of amino protection reaction 1 ~ 3h, to obtain intermediate products.

[0032] (2) The above intermediate products and formaldehyde solutions were added to the reactor, the pH was adjusted to 8 ~ 9, and the temperature was increased to 80 ° C ~ 90 ° C, the stirring speed was 200-300rp, the reaction was 2-4h, and the final product was obtained as a temperature-controlled sand fixing agent.

[0033] The reaction equation of the temperature-controlled sand fixant is as follows:

[0034]

[0035] According to a second aspect of the present invention, the present invention discloses a temperature-con...

Example Embodiment

[0045] Example 1

[0046] (1) 5mol dichloroethane was added to the reactor, followed by 1mol of p-phenylenediamine, 2mol methyl chloroformate, 5mol triethylamine, at a temperature of 70 °C, stirring speed of 150rpm under the condition of amino protection reaction for 1h, to obtain the intermediate product.

[0047](2) The above intermediate products and formaldehyde solution (containing 1mol formaldehyde) were added to the reactor, the pH value was adjusted to 8, and the temperature was increased to 80 °C, the stirring speed was 200rpm, the reaction was 2h, and the final product temperature-controlled sand fixant A was obtained 1 。

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Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to a novel temperature-control sand consolidation agent for reaction in a reservoir as well as a preparation method and application of the novel temperature-control sand consolidation agent. The preparation method comprises the following steps: in a solvent and alkaline environment, carrying out amino protection reaction on p-phenylenediamine and methyl chloroformate to obtain an intermediate product; and carrying out a synthetic reaction on the intermediate product and a formaldehyde solution under an alkaline condition to obtain a final product. The structural general formula of the temperature-control sand consolidation agent is shown in the specification, wherein n is equal to 5000-50000. The solidification temperature of the sand consolidation agent is gt; the curing time is greater than or equal to 5 hours, and the curing strength is gt; the permeability loss is less than 20%, the pump inspection period is prolonged by more than 300 days, and meanwhile, the cost is not more than 2500 yuan/ton. Therefore, the sand consolidation agent disclosed by the invention can completely meet the requirements of oil field production, and has a good application effect and application prospect.

Description

Technical field [0001] The present invention belongs to the field of petroleum exploitation technology, specifically relates to a new temperature-controlled sand fixing agent reacted in the reservoir and its preparation method and application. Background [0002] In the development and exploitation of oil wells, the problem of sand production has always been a common problem. Sand production generally refers to the phenomenon that the structure of the near-well rock layer is damaged due to the excessive production pressure difference or the loose rock of the oil and gas layer, so that the formation sand flows into the wellbore. Sand production often leads to equipment wear, which can cause damage to equipment and reduce the development yield of oil wells. In addition, the sand out of the oil well will cause damage to the formation structure, and as the amount of sand continues to increase, the volume of the formation cavity will continue to increase, which can lead to the collap...

Claims

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Application Information

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IPC IPC(8): C09K8/575C09K8/56C08G12/08
CPCC09K8/5755C09K8/56C08G12/08Y02A40/22
Inventor 赵益忠宋金波郑铎吕超张川庭董海生梁伟高雪峰马丁贾培锋
Owner CHINA PETROLEUM & CHEM CORP
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