Performance testing method for oil well air leakage prevention well cementation test block produced by silicon-aluminum sajong soil ceramic microbeads
A technology of ceramic microbeads and anti-air leakage, which is applied in the field of performance testing of oil well anti-leakage cementing test blocks prepared by materials, silica-aluminum sand ginger clay ceramic micro-beads, and can solve the problem of large change rate of cement slurry density and low compressive strength , leakage and other problems, to achieve the effect of reducing pressure, reducing density and improving pressure resistance
Inactive Publication Date: 2018-04-03
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, 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 less than 40%. at 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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Embodiment 1
[0030] The performance test of the oil well anti-leakage gas cementing test block prepared by silica-alumina sand ginger earth ceramic microbeads includes the following steps:
[0031] A. Preparation of closed-cell hollow ceramic microspheres of silica-alumina sand ginger soil:
[0032] The first step, the preparation of the base material: the particle size of 25 µm silica aluminum sand ginger soil powder, particle size of 40 µm silica powder, 30 µm alumina powder according to the weight ratio: 70wt%: 15wt%: 15wt% sampling to obtain the mixed powder;
[0033] The second step, the modified firing of the base material: After the mixed powder obtained in the first step is stirred evenly, then add 5wt% reducing resin of the total weight of the mixed powder and stir in the mixer, and press it into a billet with a compactor, at 150 After drying for 10 hours at ℃, heat preservation and firing in a reduction electric furnace at 1500℃ for 4 hours, a modified silica-alumina sand ginger ...
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Abstract
The invention provides a performance testing method for an oil well air leakage prevention well cementation test block produced by silicon-aluminum sajong soil ceramic microbeads. The method comprisesthe following steps: sampling 40-50 wt% of G-grade oil well cement, 10-15 wt% of ultra-fine cement, and 25-35 wt% of closed-hole hollow silicon-aluminum sajong soil ceramic microbeads with particle sizes of 50-250Mum, 5-7 wt% of flyash with ignition loss of 1.1%, 1.5-2 wt% of calcium oxide with purity of 99.9%, 0.5-1.0wt% of sodium sulfate and 1-5 wt% of a silicon powder, and mixing to obtain a mixture, wherein the sum of the weight percentage of components above is 100%; uniformly stirring the mixture; adjusting slurry with a water-cement ratio of 0.5 to 0.7; adding an aluminum foaming agentwith the weight of 0.2-0.5% of the total weight of the mixture to prepare swelling slurry; performing density test, pH test, homogeneity test, density change rate test, and air leakage prevention performance test on the swelling slurry.
Description
technical field [0001] The invention relates to the performance test of an oil well anti-leakage gas cementing test block prepared by silicon-aluminum sand-ginger earth ceramic microspheres, and belongs to the field of material technology. 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, 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 less than 40%. at 1.2g / cm 3 Above, it is not feasible to reduce the density of the cement test block only by increasing the proportion of lighteni...
Claims
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IPC IPC(8): G01N1/28G01N33/38
Inventor 冯青
Owner ZIBO VOCATIONAL INST