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A kind of high-strength resin plugging agent and its preparation method and application

A high-strength, resin-based technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of complex on-site construction, difficult post-processing, poor pumpability, etc., achieve convenient post-processing, meet on-site construction, improve the effect of strength

Active Publication Date: 2020-11-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this enhanced gel plugging agent has good temperature resistance and long-term stability, it has high viscosity, poor pumpability, complicated on-site construction, and difficult post-processing.

Method used

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  • A kind of high-strength resin plugging agent and its preparation method and application
  • A kind of high-strength resin plugging agent and its preparation method and application
  • A kind of high-strength resin plugging agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 100g of unsaturated resin, 1g of methyl ethyl ketone peroxide, 1g of polymerization inhibitor (TEMP:TPC=2:1), 1g of vinyl pyrrolidone into the beaker, stir evenly to make it fully mixed, then add 5g of micro silicon powder and stir well , That is, the unsaturated resin plugging agent glue-forming liquid of the present invention is obtained. Place it in a sample bottle, seal it, and place it in a 60°C constant temperature water bath to observe that the gelation time is 8h, the volume shrinkage is less than 1%, and it has good adhesion.

[0053] Inspection of blocking ability:

[0054] Investigate the blocking ability of the resin provided in this example. The specific experimental process is as follows: two sand-filled pipes with an inner diameter of 2.5cm and a length of 20cm are filled with quartz sand to make high and low permeability simulated cores, which are recorded as 1# and 2#, and the original permeability is obtained after the water is flooded to the pressure ...

Embodiment 2

[0058] Add 100g of unsaturated resin, 0.5g of methyl ethyl ketone peroxide, 1g of polymerization inhibitor (TEMP:TPC=2:1), 1g of vinyl pyrrolidone to the beaker, stir evenly to make it fully mixed, then add 5g of micro silicon powder and stir If it is uniform, the unsaturated resin plugging agent glue-forming liquid of the present invention is obtained. Place it in a sample bottle, seal it, and place it in a 60°C constant temperature water bath to observe that the gel time is 12h, the volume shrinkage is less than 1%, and it has good adhesion.

[0059] Inspection of blocking ability:

[0060] Investigate the blocking ability of the resin provided in this example. The specific experimental process is as follows: Two sand-filled pipes with an inner diameter of 2.5cm and a length of 20cm are filled with quartz sand to make high- and low-permeability simulated cores, which are recorded as 3# and 4#, and the original permeability is obtained after water flooding until the pressure is s...

Embodiment 3

[0064] Add 100g of unsaturated resin, 0.5g of methyl ethyl ketone peroxide, 2g of polymerization inhibitor (TEMP:TPC=2:1), 1g of vinyl pyrrolidone in the beaker, stir evenly to make it fully mixed, then add 5g of micro silicon powder and stir If it is uniform, the unsaturated resin plugging agent glue-forming liquid of the present invention is obtained. Place it in a sample bottle, seal it, and place it in a 60°C constant temperature water bath to observe that the gelation time is 20h, the volume shrinkage rate is less than 1%, and it has good adhesion.

[0065] Inspection of blocking ability:

[0066] Investigate the blocking ability of the resin provided in this example. The specific experimental process is as follows: two sand-filled pipes with an inner diameter of 2.5cm and a length of 20cm are filled with quartz sand to prepare high and low permeability simulated cores, which are denoted as 5# and 6#, and the original permeability is obtained after water flooding until the pr...

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Abstract

The invention relates to a high-strength resin plugging agent as well as a preparation method and application of the high-strength resin plugging agent. The high-strength resin plugging agent comprises the raw materials of unsaturated resin, a crosslinking agent and a polymerization inhibitor; the crosslinking agent is 0.5%-1% of the mass of the unsaturated resin; and the polymerization inhibitoris 0.75%-2% of the mass of the unsaturated resin. The high-strength resin plugging agent further comprises an additive being 5%-20% of the mass of the unsaturated resin. The gelation time of the high-strength resin plugging agent provided by the invention is adjustable within 3h-25h, and the high-strength resin plugging agent has the characteristics of high strength and long-term stability and issuitable for plugging large pores and fractured reservoirs for a long term.

Description

Technical field: [0001] The present invention mainly relates to a high-strength resin plugging agent and a preparation method and application thereof. The plugging agent is resistant to temperature and pressure and has long-term stability, and is applied to the technical field of oil field chemistry. Background technique: [0002] In the process of oilfield development, when the original energy of the oil layer begins to decrease, it is necessary to artificially supplement energy to the formation, that is, to inject water into the oil reservoir to increase the oil recovery. However, due to the different natural fractures, heterogeneity and oil-water mobility ratio of the formation or improper mining methods, the injected water advances unevenly along the fracture seepage or high-permeability areas, causing the oil well to discharge prematurely until the water floods. At present, most of my country's waterflooding development oil fields have entered the stage of high water cut. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/512
CPCC09K8/512
Inventor 吴千慧葛际江孙翔宇仲宇欣宋龙飞潘逸平
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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