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Coating plugging agent, preparation method thereof, and plugging slurry

A leak-stopping agent and coating technology, which is applied in the field of coating a leak-stopping agent and its preparation method and leak-stopping slurry, can solve the problems of poor temperature resistance, single material, low leak-stopping pressure-bearing capacity, etc., and can improve the pressure-bearing capacity The effect of improving the density, improving the stability,

Active Publication Date: 2019-12-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

) provides a coated water-absorbing resin, which can control the water-absorbing speed of the water-absorbing resin. After the water-absorbing resin enters the leakage layer, it absorbs water and expands to seal the leakage layer. sex problem

Method used

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  • Coating plugging agent, preparation method thereof, and plugging slurry
  • Coating plugging agent, preparation method thereof, and plugging slurry
  • Coating plugging agent, preparation method thereof, and plugging slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Component dosage:

[0031] ABS resin: 3 parts by weight

[0032] Calcium carbonate particles (0.5 ~ 1mm): 2 parts by weight

[0033] Sepiolite fiber (0.5-1mm): 1 part by weight

[0034] Mica (0.1-0.5mm): 1 part by weight

[0035] Calcium carbonate powder (300-400 mesh): 3 parts by weight

[0036] Heat the ABS resin to a molten state, add other plugging materials, mix evenly, cool to room temperature, and use a pulverizer to crush into small pieces with a particle size of 1-2 mm to obtain a coated plugging agent. Add 10 parts by weight of the coated plugging agent to 100 parts by weight of the bentonite slurry to prepare the plugging slurry, prepare 2000 mL of the plugging slurry according to the above formula, and set aside.

[0037]Install a 1mm simulated fracture core in the DL-2 plugging instrument, fill the core crack with 190g of asphalt, and then add the prepared plugging slurry into the DL-2 plugging instrument. After heating the core with simulated fracture...

Embodiment 2

[0039] Component dosage:

[0040] Vinyl chloride resin: 4 parts by weight

[0041] Calcium carbonate particles (1-2mm): 6 parts by weight

[0042] Sepiolite fiber (0.5-1mm): 1 part by weight

[0043] Mica (0.1-0.5mm): 2 parts by weight

[0044] Calcium carbonate powder (300-400 mesh): 5 parts by weight

[0045] Heat the vinyl chloride resin to a molten state, add other plugging materials, mix evenly, cool to room temperature, and crush it into 2-3 mm small pieces with a pulverizer to obtain a coated plugging agent. Add 12 parts by weight of the coated plugging agent to 100 parts by weight of the bentonite slurry to prepare the plugging slurry, prepare 2000 mL of the plugging slurry according to the above formula, and set aside.

[0046] Install a 2mm simulated fracture core in the DL-2 plugging instrument, fill the cracks of the core with 380g of asphalt, and then add the prepared plugging slurry into the DL-2 plugging instrument. The simulated fractured core was heated t...

Embodiment 3

[0048] Component dosage:

[0049] Polypropylene resin: 5 parts by weight

[0050] Calcium carbonate particles (2-3mm): 7 parts by weight

[0051] Sepiolite fiber (1-2mm): 2 parts by weight

[0052] Mica (0.5-1mm): 1 part by weight

[0053] Calcium carbonate powder (300-400 mesh): 6 parts by weight

[0054] Heating the polypropylene resin to a molten state, adding other plugging materials, mixing evenly, cooling to room temperature, crushing into small pieces of 3-4 mm with a pulverizer, and obtaining a coated plugging agent. Add 14 parts by weight of the coated plugging agent to 100 parts by weight of bentonite slurry to prepare a plugging slurry, prepare 2000 mL of the plugging slurry according to the above formula, and set aside.

[0055] Install a 3mm simulated fracture core in the DL-2 plugging instrument, fill the cracks of the core with 570g of asphalt, and then add the prepared plugging slurry into the DL-2 plugging instrument. After heating the core with simulated...

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Abstract

The invention relates to a coating plugging agent, a preparation method thereof and plugging slurry, and belongs to the field of petroleum drilling plugging. The coating plugging agent can comprise the following components in percentage by weight: 22-30% of resin; 16-34% of a high-temperature-resistant granular material; 5-12% of a fibrous material; 4.5-12% of a sheet-like material; and 26-30% ofa powder material. The plugging agent can effectively replace formation fluid, especially asphalt thick oil, at a certain temperature, and can plug cracks of 1-5 mm; the pressure bearing capacity of aformed plugging layer is larger than 10 MPa, and the temperature resistance is larger than 120 DEG C; the coating plugging agent is convenient to transport, simple to prepare plugging slurry on site,convenient to construct and worthy of popularization and application.

Description

technical field [0001] The invention relates to the field of oil drilling plugging, and more particularly relates to a coating plugging agent, a preparation method thereof and a plugging slurry. Background technique [0002] The success rate of leak plugging in the lost zone containing active fluid has not been high because the flow of active fluid flushes out the plugging material, making it impossible to form an effective plugging layer. Sinopec's southern exploration area marine strata, such as Leikoupo, Jialing River, etc., have well-developed fractures and caves and active formation water, and the pressure is less than 1.0g / cm 3 , the plugging slurry is difficult to stay in the lost channel, and the success rate of conventional plugging technology is extremely low. For example, Chunsheng 1, Shengye 1, and Jinji 1 wells failed to stop leakage using various advanced plugging technologies at home and abroad. The drilling fluid leakage in a single well reached tens of thou...

Claims

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Application Information

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IPC IPC(8): C09K8/467C09K8/44
CPCC09K8/426C09K8/44C09K8/467
Inventor 刘金华刘四海胡子乔李大奇王西江金军斌陈曾伟张凤英李凡
Owner CHINA PETROLEUM & CHEM CORP
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