Test for performance of enhanced ceramic fiber cordierite-prepared oil well anti-water-seepage well cementing test block

Abstract

The invention provides a test for performance of an enhanced ceramic fiber cordierite-prepared oil well anti-water-seepage well cementing test block, wherein the test includes the following steps: preparing materials of an anti-water-seepage well cementing test block: taking 40-50 wt% of G-grade oil well cement, 10-15 wt% of superfine cement, 25-35 wt% of cordierite closed-pore hollow ceramic microbeads with the particle diameter of 50-250 [mu]m, 5-7 wt% of fly ash with loss on ignition of 1.1%, 1.5-2 wt% of calcium oxide with the purity of 99.9%, 0.5-1.0 wt% of sodium sulfate, 1-5 wt% of silica fume and 1.0-2 wt% of an aluminum oxide powder, to obtain a mixture, wherein the sum of the weight percentages of the components is 100%; and slurry-adjusting the obtained mixture with the water-cement ratio of 0.5-0.7 to prepare a slurry, then adding a foaming agent with the amount 0.2-0.5% of the total weight of the mixture, then adding ceramic fibers, graphite microbeads and expansion resinin proportion, stirring evenly, and carrying out anti-water-seepage performance test.

Description

technical field [0001] The invention relates to the performance test of an oil well anti-seepage water cementing test block prepared by reinforced ceramic fiber cordierite, 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] Using cordierite material as a lightening agent, adding silica powder and alumina powder, improves the performance of the cementing test...

AI Technical Summary

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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