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Multi-functional nanometer oil well cement slurry

A technology of oil well cement slurry and cement slurry, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of large specific surface area of ​​nano-particles, chemical adsorption activity, insufficient use of nano-material advantages, and cement slurry system. problems such as poor flow performance, to achieve the effect of reducing formation water corrosion, ensuring national energy strategy security, and improving cementing quality

Inactive Publication Date: 2012-11-28
DAQING PETROLEUM ADMINISTRATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanoparticles have a large specific surface area and strong chemical adsorption activity. It is difficult to mix them in oil well cement, and it is not easy to dry mix them. Limits its application in the oil drilling industry

Method used

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  • Multi-functional nanometer oil well cement slurry
  • Multi-functional nanometer oil well cement slurry
  • Multi-functional nanometer oil well cement slurry

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention will be further described below in conjunction with embodiment:

[0013] Taking G-grade oil well cement as an example, the DNF nano-cement slurry system was prepared, and various properties of the system were studied.

[0014] Through surface modification and chemical grafting, the present invention improves the defect that traditional nanomaterials are easy to agglomerate and difficult to disperse, improves the mixing properties of nanoparticles, and ensures the flow performance of the nano-cement slurry system, as shown in Table 1 below.

[0015] Rheology of cement slurry system Table 1

[0016]

category

Liquidity

cm

Φ

300

Φ

100

Φ

3

n

K

Pa·S n

τ s

Pa

Q c

l / s

P f

MPa

G grade puree

24

99

71

18

0.39

3.73

9.20

98.50

0.88

DNF grout

26.5

...

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PUM

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Abstract

The invention discloses multi-functional nanometer oil well cement slurry. The cement slurry comprises the following components in parts by weight: 2.5-3 parts of modified nanometer ferric oxide, 5-5.5 parts of modified nanometer silica, 2-2.5 parts of modified nanometer magnesium oxide, 0.2-0.5 part of dispersant Sxy and 100 parts of G-grade oil well cement, wherein the water-cement (W / C) ratio is 0.46. By using the oil well cement slurry of the invention, the blending property of nanoparticles can be increased; the flowing property of the nanometer cement slurry system can be increased; the compactness of cement can be improved, the hydrated product is optimized, and the bonding property of cement sheath interface is improved, thus increasing the cementing quality of oil and gas wells and prolonging the service life thereof.

Description

Technical field: [0001] The invention relates to a cement slurry in the field of oil field drilling, in particular to a multifunctional nanometer oil well cement slurry. Background technique: [0002] In the process of oil exploration and development, oil well cement is an indispensable cementing material for well cementing. Its performance is directly related to the quality of oil and gas well cementing and the level of oil and gas recovery. With the continuous deepening of exploration and development of old oilfields and long-term water injection production, the geological conditions of the reservoirs have changed significantly, the distribution of formation pressure is uneven, the comprehensive water content is high, and the cement stone is in the disturbance of the formation fluid. After the formation fluid contacts the cement stone, the Ca(OH) in the cement stone will be removed by "leaching". 2 dissolved away; at the same time, the rich SO in the fluid 4 2- 、HCO 3 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/46C04B22/06
Inventor 徐明吕斌侯力伟杨决算吴广兴和传健姚萍
Owner DAQING PETROLEUM ADMINISTRATION
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