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High temperature and salt resistant elastic profile control and water plugging particles and preparation method thereof

A technology of profile control and water plugging and high temperature resistance, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high expansion speed and expansion ratio, weak delayed expansion performance, and reduced plugging radius, etc. The effect of strong salinity ability, high strength and elastic deformation ability, high plugging strength

Active Publication Date: 2020-10-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after years of field application, it has been shown that the delayed expansion performance of bulky particles is weak or basically lost under the conditions of high temperature, high pressure and high salinity.
Moreover, the currently used bulky particles are generally too large, and the expansion speed and expansion multiple are generally high, which seriously reduces the plugging radius, and even presents the problem of difficulty in on-site injection; Reduced, and easy to break, especially the bulky particles blocked in large pores or cracks, due to long-term erosion by strong water flow, the general validity period is no more than half a year

Method used

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  • High temperature and salt resistant elastic profile control and water plugging particles and preparation method thereof
  • High temperature and salt resistant elastic profile control and water plugging particles and preparation method thereof
  • High temperature and salt resistant elastic profile control and water plugging particles and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A method for preparing high temperature and salt resistant elastic profile control and water plugging particles, comprising the following steps:

[0037] (1) Evenly disperse 9g of lightening filler and 12g of reinforcing filler in 30g of room temperature vulcanized raw silica gel, and stir evenly to obtain a viscous mixture;

[0038] (2) Weigh a cross-linking agent equivalent to 0.04 times the mass of room temperature vulcanized silicon rubber and a vulcanization catalyst equivalent to 0.01 times the mass of room temperature vulcanized silicon rubber, add it to the viscous mixture obtained in step (1), stir and mix evenly , react at 30°C for 24 hours, raise the temperature to 80°C for 6 hours, cut and granulate to obtain high temperature resistant salt resistant elastic profile control and water shutoff particles.

[0039] In this example:

[0040] Lightening filler: D4000 hollow glass microspheres:

[0041] Reinforcing filler: DT-50073 type silicone material with a s...

Embodiment 2

[0046] A method for preparing high temperature and salt resistant elastic profile control and water plugging particles, comprising the following steps:

[0047] (1) Evenly disperse 1g of lightening filler and 15g of reinforcing filler in 30g of room temperature vulcanized raw silica gel, and stir evenly to obtain a viscous mixture;

[0048] (2) Weigh a cross-linking agent equivalent to 0.02 times the mass of room temperature vulcanized silicon rubber and a vulcanization catalyst equivalent to 0.01 times the mass of room temperature vulcanized silicon rubber, add it to the viscous mixture obtained in step (1), stir and mix evenly , react at 20°C for 36 hours, raise the temperature to 70°C for 12 hours, cut and granulate to obtain high temperature resistant, salt resistant elastic profile control and water plugging particles.

[0049] In this example:

[0050]Lightening filler: C20 type hollow glass microspheres

[0051] Reinforcing filler: DT-12573 type silicone material rein...

Embodiment 3

[0056] A method for preparing high temperature and salt resistant elastic profile control and water plugging particles, comprising the following steps:

[0057] (1) Evenly disperse 15g of lightening filler and 3g of reinforcing filler in 30g of room temperature vulcanized raw silica gel, and stir evenly to obtain a viscous mixture;

[0058] (2) Weigh a cross-linking agent equivalent to 0.1 times the mass of room temperature vulcanized silicon rubber and a vulcanization catalyst equivalent to 0.04 times the mass of room temperature vulcanized silicon rubber, add it to the viscous mixture obtained in step (1), stir and mix evenly , reacted at 50°C for 12 hours, raised the temperature to 120°C for 3 hours, cut and granulated, and obtained high-temperature-resistant, salt-resistant, elastic profile control and water-blocking particles.

[0059] In this example:

[0060] Lightening filler: D6000 hollow glass microspheres

[0061] Reinforcing filler: thermosetting methyl silicone ...

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Abstract

The invention discloses a high temperature-resisting high-salt elastic profile-control water-plugging grain and a preparation method. The preparation method comprises the following steps: (1) uniformly dispersing lightened filler and reinforcing filler into a room temperature silicon sulfide rubber and uniformly stirring, thereby acquiring a thick mixture; (2) adding cross-linking agent and vulcanization catalyst into the thick mixture, stirring, reacting, cutting and pelletizing, thereby acquiring the end product. According to the invention, the preparation process is simple, the cost is lowand the high temperature-resisting high-salt elastic profile-control water-plugging grain has higher adaptability to wall cracks in different shapes; under the effect of differential pressure, the elastic grains can be deformed, moved and extruded into the wall cracks and can generate larger friction forces with walls; after a plurality of plugging grains enter into holes or cracks at the same time, the sum of friction forces is more than the differential pressure of production, so that the wall cracks can be completely plugged; thus, the elastic plugging grain has excellent adaptability to wall cracks with inlets in different shapes; the elastic deformability of the elastic plugging grain can overcome the defects of poor moving capacity and adaptability caused by incapability of deformingof rigid solid grains.

Description

technical field [0001] The invention relates to a profile control agent used in oilfield chemical water plugging and profile control technology in petroleum engineering, in particular to a high temperature resistant and salt resistant elastic profile control water plugging particle and a preparation method. Background technique [0002] Due to the heterogeneity of the reservoir itself and the influence of development factors, the low sweep coefficient of injected fluid is common in all oilfields in my country. For example, Tahe, Daqing, Shengli and other water injection development oilfields in Xinjiang have entered a high water cut period. A large amount of injected water has channeled along the high permeability layer, while the low permeability layer is rarely affected, which greatly reduces the utilization rate of injected water. The large amount of produced water is expensive to treat and also puts a heavy burden on the oil field. Therefore, it is urgent to carry out r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/512C09K8/516
CPCC09K8/5086C09K8/512C09K8/516C09K2208/18
Inventor 郭锦棠李鹏鹏陈頔徐杨任相魁冯亚凯
Owner TIANJIN UNIV