Performance test method for air leakage-resisting cell cementing test block prepared by using silicon vanadine ceramic mierobeads for oil well
A technology of ceramic microbeads and anti-air leakage, which is applied in the field of materials, can solve the problems of affecting the compressive strength of cement test blocks, the large change rate of cement slurry density, and low compressive strength, so as to improve the compressive strength and reduce the density , the effect of reducing stress
Inactive Publication Date: 2018-05-08
ZIBO VOCATIONAL INST
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Problems solved by technology
[0002] At present, in oil well cementing at home and abroad, ultra-low density cement is used for high-temperature and high-pressure oil wells, but fly ash floating beads are used, which has low compressive strength and a large change rate of cement slurry density. After the cement slurry is statically solidified, air leakage, Leakage, in addition, the proportion of lightening agents such as fly ash floating beads must be controlled within 40%, otherwise, the lightening agent will affect the compressive strength of the cement test block, and the density of the cement test block is within 40%. 1.2g / cm 3 Above, it is not feasible to reduce the density of the cement test block only by increasing the proportion of lightening agent
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[0030] A performance test method for preparing an oil well anti-leakage gas cementing test block from silicon vanadium ceramic microbeads, comprising the following steps:
[0031] A. Preparation of silica-vanadium closed-cell hollow ceramic microspheres:
[0032] The first step, the preparation of the base material: the silicon dioxide powder with a particle size of 20 μm, the vanadium pentoxide powder with a particle size of 30 μm, and the vanadium clay with a particle size of 20 μm are sampled according to the weight ratio: 70wt%: 20wt%: 10wt%.
[0033] The second step, the modified firing of the base material: After the first step is mixed and stirred evenly, then add 5wt% phenolic resin of the total weight of the mixed powder, stir evenly in the mixer, and press it into a billet with a compactor, at 150 ° C Dry for 10 hours, heat-preserve and fire in a reduction electric furnace at 1500°C for 4 hours, and obtain a modified silica-vanadium ceramic block through a replacemen...
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Abstract
The invention provides a performance test method for an air leakage-resisting cell cementing test block prepared by using silicon vanadine ceramic mierobeads for an oil well. The performance test method comprises the following steps: mixing 40 to 50 weight percent of G-grade oil well cement, 10 to 15 weight percent of superfine cement, 25 to 35 weight percent of closed pore hollow silicon vanadineceramic microbeads with the particle size of 50 to 250mu m, 5 to 7 weight percent of fly ash with 1.1 percent of ignition loss, 1.5 to 2 weight percent of calcium oxide with the purity of 99.9 percent, 0.5 to 1.0 weight percent of sodium sulfate and 1 to 5 weight percent of silicon powder to obtain a mixture, wherein the sum of the weight percentage of all components is 100 percent; uniformly stirring the mixture and carrying out size mixing according to water cement ratio of 0.5 to 0.7, and then adding an aluminum foaming agent which is 0.2 to 0.5 weight percent of total weight of the mixture, thus obtaining expandable slurry; determining the density and a pH value of the expandable slurry and carrying out a uniformity test, a density change rate test and air leakage-resisting performance test on the expandable slurry.
Description
technical field [0001] The invention relates to a performance test method for preparing an oil well anti-leakage gas cementing test block by silica vanadium ceramic microbeads, belonging to the technical field of materials. Background technique [0002] At present, in oil well cementing at home and abroad, ultra-low density cement is used for high-temperature and high-pressure oil wells, but fly ash floating beads are used, which has low compressive strength and a large change rate of cement slurry density. After the cement slurry is statically solidified, air leakage, Leakage, in addition, the proportion of lightening agents such as fly ash floating beads must be controlled within 40%, otherwise, the lightening agent will affect the compressive strength of the cement test block, and the density of the cement test block is within 40%. 1.2g / cm 3 Above, it is not feasible to reduce the density of the cement test block only by increasing the proportion of lightening agent. C...
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IPC IPC(8): G01N33/38G01N9/36G01N1/28
Inventor 王金萍
Owner ZIBO VOCATIONAL INST