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Plugging agent containing nano-particles and preparation method of plugging agent

A technology of nano-particles and plugging agents, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of increasing the risk of shale well wall collapse, insufficient rock micro-pore and micro-fracture sealing ability, and filter cake Insufficient compactness and other problems, to achieve the effects of strong compactness, improved plugging ability, and improved stability

Inactive Publication Date: 2017-05-10
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcomings or deficiencies of these technologies are: the formed filter cake is not dense enough, and the ability to seal the micropores and micro-cracks of the rock is not enough, resulting in the fact that water still has a certain degree of impact on the mud shale when drilling in a long mud shale well section. Intrusion on the shale, which increases the risk of shale well wall collapse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The plugging agent used in this embodiment comprises the following components with 100 parts by weight:

[0023] 90 parts by weight of nanoemulsion;

[0024] 8 parts by weight of nanomaterials;

[0025] System stabilizer 2 parts by weight.

[0026] The preparation method that present embodiment uses described nanometer material comprises:

[0027] First, mix nano-silica, nano-titanium dioxide, and nano-graphite in a weight ratio of 6:1:3, and set aside. Then put stearic acid and NaOH with a weight ratio of 1:1 in a container, add water, and heat and stir at 40°C and 8000r / min. After stearic acid and NaOH are completely dissolved, add to the nanoparticle mixture (with hard The weight ratio of fatty acid is 8~15:1). Stir at constant temperature at 25°C and 5000r / min for 30min~120min, filter with suction, wash off the organic matter on the surface with absolute ethanol, wash once with water, and dry to obtain the nanomaterial.

[0028] The preparation method of using ...

Embodiment 2

[0031] The plugging agent used in this embodiment comprises the following components with 100 parts by weight:

[0032] 80 parts by weight of nanoemulsion;

[0033] 14 parts by weight of nanomaterials;

[0034] System stabilizer 6 parts by weight.

[0035] The preparation method that present embodiment uses described nanometer material comprises:

[0036] First, mix nano-silica, nano-titanium dioxide, and nano-graphite in a weight ratio of 8:2:5, and set aside. Then put stearic acid and NaOH with a weight ratio of 1:1 in a container, add water, and heat and stir at 40°C and 8000r / min. After stearic acid and NaOH are completely dissolved, add the nanoparticle mixture (with stearin The weight ratio of acid is 8~15:1). Stir at a constant temperature of 25°C and 5000r / min for 30-120min, filter with suction, wash off the organic matter on the surface with absolute ethanol, wash with water once, and dry to obtain the nanomaterial.

[0037] The preparation method of using the de...

Embodiment 3

[0040] The plugging agent used in this embodiment comprises the following components with 100 parts by weight:

[0041] 85 parts by weight of nanoemulsion;

[0042] 12 parts by weight of nanomaterials;

[0043] System stabilizer 3 parts by weight.

[0044] The preparation method that present embodiment uses described nanometer material comprises:

[0045] First, mix nano-silica, nano-titanium dioxide, and nano-graphite in a weight ratio of 6:1:4, and set aside. Then put stearic acid and NaOH with a weight ratio of 1:1 in a container, add water, and heat and stir at 40°C and 8000r / min. After stearic acid and NaOH are completely dissolved, add the nanoparticle mixture (with stearin The weight ratio of acid is 8~15:1). Stir at a constant temperature of 25°C and 5000r / min for 30-120min, filter with suction, wash off the organic matter on the surface with absolute ethanol, wash with water once, and dry to obtain the nanomaterial.

[0046] The preparation method of using the de...

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Abstract

The invention provides a plugging agent containing nano-particles and a preparation method. The plugging agent containing the nano-particles comprises, by weight, 80-90 parts of nano-emulsion, 8-14 parts of nano-materials and 2-6 parts of system stabilizers. The preparation method includes the steps: adding the nano-particles into the nano-emulsion at the temperature ranging from 20 DEG C to 40 DEG C; stirring the nano-particles at a high speed for 20-30 minutes by a magnetic stirrer; gradually adding the system stabilizers under low-speed stirring; stirring the materials at a high speed for 20-30 minutes to obtain the plugging agent. Other nano-particles are further added based on the nano-emulsion, the plugging capacity of the nano-emulsion is improved, pores and micro-cracks are plugged, a formed filter cake is compact, the quality of the filter cake can be improved, filter loss of drilling fluid is reduced, stability of the wall of a well is improved, the lubricating property of the drilling fluid can be improved, and penetration rate is increased.

Description

technical field [0001] The invention relates to the technical field of chemical materials for petroleum drilling, in particular to a nano-blocking agent for drilling fluid. Background technique [0002] In the process of oil and gas drilling, wellbore stability is a common problem. Wellbore instability can easily lead to downhole complex situations and accidents such as wellbore collapse, diameter shrinkage, leakage, pipe sticking and reservoir pollution, which will not only delay the drilling cycle, increase drilling costs, but also affect subsequent oil recovery operations. In severe cases, some wellbores may be scrapped or even the entire wellbore may be scrapped. It is estimated that the direct economic losses caused by wellbore instability in the world amount to hundreds of millions of dollars every year, seriously affecting the economic benefits of oilfield development. Therefore, it is of great significance to keep the wellbore stable during oil and gas drilling, an...

Claims

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Application Information

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IPC IPC(8): C09K8/03
CPCC09K8/03C09K2208/10C09K2208/12C09K2208/28C09K2208/34
Inventor 刘振东李公让侯业贵周守菊蓝强
Owner SINOPEC SSC
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