Performance testing of anti-pressure oil well anti-seepage well cementation briquette prepared from ceramic fiber and gangue

Abstract

The invention provides a performance testing of anti-pressure oil well anti-seepage well cementation briquette prepared from ceramic fiber and gangue. The performance testing comprises the following steps: preparing the ingredients of the anti-seepage well cementation briquette: 40wt% to 50wt% of G-level oil well cement, 10wt% to 15wt% of superfine cement, 25wt% to 35wt% of gangue close-hole hollow ceramic microbeads with the particle sizes of 50 to 350 microns, 5wt% to 7wt% of coal ash with the ignition loss of 1.1%, 1.5wt% to 2wt% of calcium oxide with the purity of 99.9%, 0.5wt% to 1.0wt% of sodium sulfate, 1wt% to 5wt% of silica powder and 1.0wt% to 2wt% of alumina powder for sampling to obtain a mixture, wherein the sum of the weight percentages of the components is 100%; and blendingthe obtained mixture with the water cement ratio being 0.5 to 0.7 for size mixing to prepare a sizing agent, then adding a foaming agent with the total weight of 0.2% to 0.5% of that of the mixture,then adding ceramic fiber, graphite microbeads and expansion resin in proportion, and stirring uniformly to carry out anti-seepage performance testing.

Description

technical field [0001] The invention relates to a performance test of an oil well anti-seepage water cementing test block prepared from pressure-resistant ceramic fiber coal gangue, and belongs to the field of material technology. Background technique [0002] At present, in oil well cementing at home and abroad, cement slurry is used for high temperature and high pressure oil wells, but fly ash floating beads are used, the compressive strength is low, the rate of change of cement slurry density is large, and excessive water loss occurs after the cement slurry is statically solidified. 1. The shrinkage ratio of the test block is too large. In addition, the test block has poor toughness, tensile strength, flexural resistance, and impact resistance, and a large amount of water loss is reduced, resulting in leakage. Contents of the invention [0003] Coal gangue is used as a lightening agent, and silicon powder and alumina powder are added to improve the performance of the ce...

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Problems solved by technology

[0002] At present, in oil well cementing at home and abroad, cement slurry is used for high temperature and high pressure oil wells, but fly ash floating beads are used, the compressive strength is low, the rate of change of cement slurry density is large, and excessive water loss occurs after the cement slurry is statically solidified. 1. The shrinkage ratio of the test block is too large. In addition, the test block has poor toughness, tensile strength, flexural resistance, and impact resistance, and a large amount of water loss is reduced, resulting in leakage

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