Novel liquid silicon anti-channeling cement slurry used in well cementation

A technology of cement slurry and liquid silicon, which is applied to drilling compositions, chemical instruments and methods, etc., can solve the problems of density, fluidity thickening time fluctuation, reduce the compressive strength of cement stone, etc., and achieve simple mixing and use. , Good uniformity, wide density effect

Inactive Publication Date: 2015-11-11
成都欧美克石油科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the solid content of the liquid latex obtained by the prior art can only reach about 50%, while the solid content of the polymer latex powder often reaches more than 9

Method used

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  • Novel liquid silicon anti-channeling cement slurry used in well cementation
  • Novel liquid silicon anti-channeling cement slurry used in well cementation
  • Novel liquid silicon anti-channeling cement slurry used in well cementation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment and

[0032] Embodiment and comparative example are as follows:

Embodiment 1

[0033] [Example 1] A new type of liquid silicon anti-channeling cement slurry for well cementing provided by the present invention, low density (1.50g / cm 3 ), which contains the following raw materials in parts by weight, 95 parts of G-grade cement, 10 parts of strength stabilizer, 0.5 part of retarder, 0.1 part of defoamer, 5 parts of filler, 0.5 part of dispersant, 5 parts of anti-air channeling agent , 5 parts of fluid loss reducer, 20 parts of lightening agent, 100 parts of water. The strength stabilizer is microsilicon, the retarder is AMPS polymer, the defoamer is polyether, the filler is ultrafine particle material, and the dispersant is aldehyde-ketone condensate. The anti-air channeling agent is liquid silicon, the water loss reducing agent is AMPS polymer, and the lightening agent is floating beads. The raw materials were mixed and stirred evenly to prepare well cementing cement slurry, and the relevant properties of the cement slurry were measured. The results are ...

Embodiment 2

[0034] [Example 2] A new type of liquid silicon anti-channeling cement slurry for well cementing provided by the present invention contains the following raw materials in parts by weight, 100 parts of G-grade cement, 15 parts of strength stabilizer, 1.5 parts of retarder, 0.15 Parts of defoamer, 10 parts of filler, 1 part of dispersant, 8 parts of anti-air channeling agent, 2 parts of fluid loss reducer, 100 parts of water. The strength stabilizer is amorphous silica with a purity of 98%, the retarder is AMPS polymer, the defoamer is polyether, the filler is ultrafine particle material, and the dispersant It is a naphthalene-based dispersant, the anti-air channeling agent is silica sol, and the fluid loss reducing agent is PVA. The raw materials were mixed and stirred evenly to prepare well cementing cement slurry, and the relevant properties of the cement slurry were measured. The results are shown in Table 1. The thickening curve at 120°C is as follows: figure 2 shown.

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Abstract

The invention discloses a novel liquid silicon anti-channeling cement slurry used in well cementation, which includes following raw materials, by weight, 95-105 parts of G-grade cement, 10-35 parts of a strength stabilizer, 0.5-4 parts of a retarder, 0.1-0.2 parts of a defoaming agent, 5-15 parts of a filling agent, 0.5-2 parts of a dispersing agent, 100 parts of water, 5-15 parts of an anti-gas channeling agent, 5-10 parts of a fluid loss agent and also a density adjusting agent. The raw materials are mixed and stirred uniformly to prepare the novel liquid silicon anti-channeling cement slurry. The anti-channeling cement slurry is low in water loss, is good in stability, is short in static gelatinization transition time, is strong in anti-gas channeling performance, is quick in early strength development at a low temperature and resists corrosion of acidic mediums. Set cement slurry is slight in expansion, is less in porosity, is high in compactness and low in permeability, and can satisfy requirements in various well cementation situations.

Description

technical field [0001] The invention relates to a novel liquid silicon anti-channeling cement slurry for well cementing, which belongs to the field of petroleum and natural gas drilling engineering technology and oil field chemistry. Background technique [0002] At present, more and more attention is paid to the anti-channeling effect of cement slurry, and the anti-channeling ability of cement slurry has become a key research topic in the field of cementing. In the existing cementing operations, there are shallow gas layers and surface aquifers, low formation pressure bearing capacity, and low operating temperature in winter, so that the cement slurry gels slowly and develops strength slowly, and the weight loss of the cement slurry during curing leads to a drop in liquid column pressure. It is very easy to lead to the occurrence of water-gas channeling. Gas channeling is a common phenomenon in natural gas cementing. A potential problem exists in almost all natural gas wel...

Claims

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Application Information

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IPC IPC(8): C09K8/493C04B28/00
CPCC09K8/493C04B28/00C04B2103/22C04B2103/408C04B2103/50C09K8/426
Inventor 刘东唐昌强曹智
Owner 成都欧美克石油科技股份有限公司
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