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A kind of curing plugging agent and its preparation method and plugging slurry

A plugging agent and curing agent technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor asphalt softening point, difficult plugging materials, etc., to improve suspension capacity, prevent precipitation, The effect of ensuring drilling safety

Active Publication Date: 2021-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology is greatly affected by the drilling fluid environment, and the effect of increasing the softening point of bitumen in the drilling fluid is poor, and it is difficult to truly achieve the purpose of assisting in improving the plugging material to stay in the lost channel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The proportioning in parts by weight weighs the following components:

[0033] Slag (300-500 mesh): 100 parts by weight

[0034] Calcium hydroxide: 0.5 parts by weight

[0035] Lignosulfonate: 0.2 parts by weight

[0036] Polyoxyethylene cetyl ether compound: 0.5 parts by weight

[0037] Sodium bentonite: 5 parts by weight

[0038] Sepiolite fiber: 1 part by weight

[0039] The performance test method used refers to "oil well cement test method GB / T19139-2012".

[0040] Add lignosulfonate, polyoxyethylene cetyl ether compound and calcium hydroxide to 100 parts by weight of water, stir at high speed for 5 minutes, then add sodium bentonite, stir for 10 minutes, hydrate for 16 hours, then add slag and sea foam in sequence Stone fiber, stir for 5 minutes, take 300mL of stirred plugging slurry, add 60g of asphalt thick oil, heat to 60°C, stir well, put it into a pressurized curing kettle, raise the temperature to 120°C, pressurize to 35MPa, and cure for 24h After taki...

Embodiment 2

[0042] The proportioning in parts by weight weighs the following components:

[0043] Lignosulfonate: 0.6 parts by weight

[0044] Alkylphenol polyoxyethylene ether: 1.0 parts by weight

[0045] Slag (300-500 mesh): 150 parts by weight

[0046] Sodium hydroxide: 1.3 parts by weight

[0047] Sodium bentonite: 8 parts by weight

[0048] Aluminum silicate fiber: 3 parts by weight

[0049]Add lignosulfonate, alkylphenol polyoxyethylene ether and sodium hydroxide to 100 parts by weight of water, stir at high speed for 5 minutes, then add sodium bentonite, stir for 10 minutes, hydrate for 16 hours, then add slag and aluminum silicate in sequence Fiber, stirred for 5 minutes, took 300mL of the stirred plugging slurry, added 60g of asphalt heavy oil, heated to 60°C, stirred well, put it into a pressurized curing kettle, raised the temperature to 120°C, pressurized to 35MPa, and maintained for 24h. After it was taken out, the strength was tested on a press, and the strength was 3....

Embodiment 3

[0051] The proportioning in parts by weight weighs the following components:

[0052] Sodium lauryl sulfate: 1 part by weight

[0053] Polysiloxane polyether copolymer: 1.5 parts by weight

[0054] Slag (300-500 mesh): 200 parts by weight

[0055] Sodium hydroxide: 1.5 parts by weight

[0056] Sodium bentonite: 10 parts by weight

[0057] Sepiolite fiber: 5 parts by weight

[0058] Add sodium lauryl sulfate, polysiloxane polyether copolymer and sodium hydroxide to 100 parts by weight of water, stir at high speed for 5 minutes, then add sodium bentonite, stir for 10 minutes, and hydrate for 16 hours, then add slag and seawater in sequence. Stir for foam stone fiber for 5 minutes, take 300mL of the stirred plugging slurry, add 60g of asphalt heavy oil, heat to 60°C, stir well, put it into a pressurized curing kettle, raise the temperature to 120°C, pressurize to 35MPa, and cure After 24 hours, take it out and test its strength on a press, and the strength is 3.3MPa. Observi...

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Abstract

The invention relates to a solidified plugging agent in the field of oil drilling plugging, a preparation method thereof, and a plugging slurry; the cured plugging agent includes the following components in parts by weight: 100 parts of curing agent, 0.4 to 0.4 parts of activator 1.2 parts, 0.2-1 parts of viscosity reducer, 0.5-1.5 parts of dispersant, 4-10 parts of suspending agent, 1-5 parts of fiber crosslinking agent; the temperature resistance of the plugging slurry prepared by the solidified plugging agent is greater than 120°C , the pressure bearing capacity of the plugging slurry after curing is greater than 10 MPa, it can accommodate 20% of asphalt heavy oil, and the strength after curing is greater than 3.0 MPa. The cured plugging slurry of the present invention has good compatibility with asphalt, and can effectively block the asphalt loss layer. Reduce the occurrence of complicated situations; with the deepening of petroleum exploration and development, drilling encounters more and more complex geological environments. The solidified lost circulation slurry of the present invention can seal lost circulation layers in complex geological environments of asphalt layers to ensure drilling safety. Drill faster.

Description

technical field [0001] The invention relates to the field of oil drilling plugging, and more particularly relates to a solidified plugging agent, a preparation method thereof and a plugging slurry. Background technique [0002] During the drilling process in Yada Oilfield, Iran, some wells suffered serious bitumen invasion. Asphalt seriously affects the normal maintenance of drilling fluid performance, and also has a great impact on the performance of plugging slurry. The plugging effect is poor. Conventional inert material plugging technology , cement injection plugging technology, water glass plugging technology, chemical consolidation plugging technology, asphalt solidification technology, all can not effectively plug the asphalt layer. When the drilling fluid density is increased to kill the well, it cannot effectively prevent the bitumen gushing out, but instead increases the amount of bitumen gushing out, and a large amount of bitumen adheres to the drill pipe, resulti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467C09K8/42
CPCC09K8/467C09K8/426
Inventor 刘金华刘四海赵向阳胡子乔王西江李大奇陈曾伟张凤英马鹏褚奇
Owner CHINA PETROLEUM & CHEM CORP
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