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High-water-loss plugging agent solid-phase plugging particles for drilling fluid

A technology with high water loss and drilling fluid, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of loss of manpower, material resources, financial resources, and the inability to accurately grasp the opening size of formation leaks, so as to reduce excessive pressure. big effect

Inactive Publication Date: 2020-10-30
ANHUI LUHAI PETROLEUM AUX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the opening size of leaky seams in the formation cannot be accurately grasped, the leak plugging plan can only be formulated based on the limited data analysis and experience on site. There are often problems of stopping leaks after one block and repeated leaks after one cycle, resulting in huge manpower, material and financial resources. loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] High water loss plugging agent solid phase plugging particles for drilling fluid, made of the following raw materials in parts by weight: 50 parts of bisphenol A epoxy resin, 10 parts of auxiliary agent, 50 parts of fiber material and 16 parts of curing agent;

[0030] The first step is to add bisphenol A epoxy resin and additives to the reaction kettle, evacuate the system to a vacuum, set the temperature at 60°C at a speed of 300r / min, set the heating rate at 5°C / min, and stir after the heating is completed 0.5h, obtain mixture A;

[0031] Step 2: Set the temperature of the reactor to 70°C, set the rotation speed to 450r / min, add fiber material to mixture A, stir for 1 hour, lower the temperature to 30°C, add curing agent and stir for 30 minutes to prepare mixture B;

[0032] Step 3: Ultrasonicate the mixture B for 10 minutes at a frequency of 4 kHz, wash the obtained precipitate three times with deionized water, then three times with absolute ethanol, and dry in a dr...

Embodiment 2

[0045] High water loss plugging agent solid phase plugging particles for drilling fluid, made of the following raw materials in parts by weight: 55 parts of bisphenol A epoxy resin, 15 parts of auxiliary agent, 55 parts of fiber material and 18 parts of curing agent;

[0046] The first step is to add bisphenol A epoxy resin and additives to the reaction kettle, pump the system to vacuum, set the temperature at 65°C at a speed of 350r / min, and set the heating rate at 5°C / min, and stir after the heating is completed 0.5h, obtain mixture A;

[0047] Step 2: Set the temperature of the reactor to 80°C, set the rotation speed to 500r / min, add fiber material to the mixture A, stir for 1.5h, lower the temperature to 30°C, add the curing agent and stir for 30min to prepare the mixture B;

[0048] Step 3: Ultrasonicate the mixture B for 20min at a frequency of 4.5kHz, wash the obtained precipitate three times with deionized water, then wash three times with absolute ethanol, and place i...

Embodiment 3

[0061] High water loss plugging agent solid phase plugging particles for drilling fluid, made of the following raw materials in parts by weight: 60 parts of bisphenol A epoxy resin, 20 parts of auxiliary agent, 60 parts of fiber material and 20 parts of curing agent;

[0062] The first step is to add bisphenol A epoxy resin and additives to the reaction kettle, evacuate the system to a vacuum, set the temperature at 70°C at a speed of 400r / min, set the heating rate at 5°C / min, and stir after the heating is completed 0.5h, obtain mixture A;

[0063] Step 2: Set the temperature of the reactor to 90°C, set the rotation speed to 550r / min, add fiber material to mixture A, stir for 2 hours, lower the temperature to 30°C, add curing agent and stir for 30 minutes to prepare mixture B;

[0064] Step 3: Ultrasonicate the mixture B for 30 minutes at a frequency of 5 kHz, wash the obtained precipitate three times with deionized water, then wash three times with absolute ethanol, and dry i...

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Abstract

The invention discloses high-water-loss plugging agent solid-phase plugging particles for a drilling fluid. The high-water-loss plugging agent solid-phase plugging particles are prepared from the following raw materials in parts by weight: 50-60 parts of bisphenol A epoxy resin, 10-20 parts of an auxiliary agent, 50-60 parts of a fiber material and 16-20 parts of a curing agent; a fiber material is added in the preparation process, so that the strength, the hardness, the fullness and the stability of the solid-phase plugging particles are enhanced; the fiber material is small in size and can be used for filling gaps in the solid-phase plugging particles, so that the solid-phase plugging particles become more compact and are not easy to deform due to change of external conditions. An auxiliary agent is also added in the preparation process; azo diamide and sodium bicarbonate in the auxiliary agent have a foaming effect, so that a microporous structure is formed in the generated solid-phase plugging particles, the drilling fluid can quickly lose water on the plug surface, the influence caused by overlarge pressure due to quick water loss is reduced, and meanwhile, small-particle-sizeparticles can be effectively blocked.

Description

technical field [0001] The invention belongs to the technical field of plugging agent preparation, and in particular relates to solid phase plugging particles of high water loss plugging agent for drilling fluid. Background technique [0002] The bridge plugging technology is well-received for its safety, economy and simple operation process, and it is widely used in the field. However, since the opening size of leaky seams in the formation cannot be accurately grasped, the leak plugging plan can only be formulated based on the limited data analysis and experience on site. There are often problems of stopping leaks after one block and repeated leaks after one cycle, resulting in huge manpower, material and financial resources. loss. Therefore, it is very necessary to explore new methods of plugging. The mechanism of the high water loss plugging agent is to use its high water loss performance to accumulate into a solid phase in the leakage area, and then block the leakage c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/467
CPCC09K8/03C09K8/426C09K8/467C09K2208/08
Inventor 柳云涛
Owner ANHUI LUHAI PETROLEUM AUX TECH
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