Low-density high-strength leak-resistant slurry method for sealing leakage producing formation
A leak-proof, high-strength technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of large reduction in compressive strength of cement stone, limited application range, difficult performance adjustment, etc., to improve mechanical properties, Large social benefits, the effect of reducing corrosion
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[0028] The present invention will be further described in the following embodiments:
[0029] The low-density and high-strength anti-leakage cement slurry method for sealing the lost production layer, according to the principle of particle grading, mixes cement, microsilica, floating beads with fluid loss agent, expansion agent, drag reducer and water in a certain proportion.
[0030] Table 1 shows the thickening time performance data table of low-density and high-strength leak-proof cement. It can be seen from the following example data: the determined cement slurry formula has a better compatibility with the change in the cement production area and the amount of lightening agent. The thickening time of cement slurry is more than 110 minutes, which can meet the requirements of cementing site construction performance parameters.
[0031] Table 1
[0032]
[0033] Table 2 shows the rheological properties of cement slurries under different water-solid ratios for low-density and high-...
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