Preparation method for inorganic-organic composite type profile control agent

A composite profile control agent technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of profile control agent temperature resistance, alkali resistance and poor mechanical properties, and achieve alkali resistance and Good mechanical properties, stable structure, good plugging effect

Active Publication Date: 2013-05-15
黑龙江赛恩思科技信息咨询服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of poor temperature resistance, alkali resistance and mechanical properties of existing profile control agents, and provides a preparation method of an inorganic-organic composite profile control agent

Method used

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  • Preparation method for inorganic-organic composite type profile control agent

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specific Embodiment approach 1

[0009] Specific embodiment one: In this embodiment, a method for preparing an inorganic-organic composite profile control agent is carried out through the following steps:

[0010] 1. Preparation of silicon dioxide: a. Weigh 10-20mL of ammonia water, 10-20mL of absolute ethanol and 8-12mL of ethyl orthosilicate; b. Mix the ammonia water and absolute ethanol weighed in step a, and stir for 9 ~11min, then put it into a three-necked flask at a temperature of 55-65°C, turn on the electronic stirrer and reflux condensed water, add the tetraethyl orthosilicate weighed in step a, continue the reaction for 4-6h, then transfer it into a centrifuge tube, Centrifuge at 2000r / min for 4-6min, take the solid phase, and then use absolute ethanol to ultrasonically disperse and wash for 3-4 times until the pH value is neutral, then put it into an oven at a temperature of 55-70°C. Dry for 5-7 hours to obtain silicon dioxide;

[0011] 2. Surface modification of silica by silane coupling agent: ...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in Step 1, 10 mL of ethyl orthosilicate, 15 mL of ammonia water, and 15 mL of absolute ethanol are weighed. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the silane coupling agent in step 2 is KH-570. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method for an inorganic-organic composite type profile control agent and relates to a preparation method for a profile control agent. The preparation method is mainly used for solving the problems that the existing profile control agent is poor in temperature resistance, alkali resistance and mechanical properties. The preparation method comprises the following steps of: firstly, preparing silicon dioxide; secondly, modifying the surface of silicon dioxide by silane coupling agent; and thirdly, coating the silicon dioxide by polymer monomer. The profile control agent prepared by the preparation method disclosed by the invention is good in temperature resistance, alkali resistance and mechanical properties, so that the physical plugging and chemical plugging are combined together, and the profile control effect is improved. The preparation method disclosed by the invention is applied to the chemical field.

Description

technical field [0001] The invention relates to a preparation method of a profile control agent. Background technique [0002] Today, with increasing oil consumption, many oil fields in my country have entered the late stage of development. How to improve oil recovery and develop high-efficiency temperature-resistant and alkali-resistant profile control agents has become more and more important. Many existing profile control agents have performance defects and deficiencies: due to the influence of oil layer temperature, they are easy to age under high temperature conditions; Under certain conditions, the profile control agent will automatically degrade; the current oil layer medium is severely alkalized, and the pH value in the oil layer is about 7 to 10, which makes the profile control agent decompose and age; in the complex environment of the underground oil layer, temperature, mineralization Temperature and PH value are important reasons that affect the performance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C09K8/42
Inventor 徐用军田明褚宏举郭飞
Owner 黑龙江赛恩思科技信息咨询服务有限公司
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