Elasto-plastic well cementing cement slurry and preparation method thereof
A cementing cement slurry and elastoplastic technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high price and wide use, poor temperature resistance, low surface activity, etc., to achieve low price and reduce The effect of improving permeability and mechanical properties
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preparation example Construction
[0055] 1. Preparation of plasticizer
[0056] Preparation of Plasticizer A:
[0057] Add 110 parts by weight of fly ash microbeads (particle size range 0.005-0.05mm, average particle diameter 0.012mm, produced by Shandong Dezhou Power Plant) into an aqueous solution containing sodium hexadecylbenzenesulfonate at a weight concentration of 0.5% to obtain powder Coal ash microbead suspension, wherein the weight percentage concentration of fly ash microbead is 50%; After mixing with the natural rubber latex (Dezhou Continental Shelf Company production) of solid phase content 1 weight part afterwards, pump into spray drier (LGZ- A, prepared by Wuxi Dongsheng Spray Granulation Drying Machinery Factory). The flow direction of the fluid in the whole process is that the air enters from the spray dryer inlet, is heated to 160°C by the heating furnace, and contacts with the fly ash microbead suspension and natural rubber latex mixture flowing in the same direction in a co-current mann...
Embodiment 1
[0062] Weigh 100 parts of cement, 30 parts of high-temperature stabilizer (microsilica fume), 5 parts of fluid loss reducer (DZJ-Y), 1.2 parts of dispersant (DZS, Sinopec Petroleum Engineering Technology Research Institute), 1.5 parts of retarder ( Sinopec Petroleum Engineering Technology Research Institute, DZH-2), 38 parts of water, 0.2 parts of defoamer (DZX, Sinopec Petroleum Engineering Technology Research Institute), 8 parts of plasticizer A, nanofiller (Misi, Sinopec Petroleum Engineering Technology Research Institute) Research Institute) 5 copies;
[0063] The preparation method of the elastic-plastic well cementing slurry:
[0064] (1) Mix cement, high-temperature stabilizer (microsilica fume), and plasticizer evenly;
[0065] (2) Add water to the constant speed stirring slurry cup, add dispersant, retarder, fluid loss reducer, defoamer, nanofiller and stir evenly, the stirring speed is 2500 rpm, and stir after adding each component Time 40s;
[0066] (3) Pour the ...
Embodiment 2
[0070] Weigh 100 parts of cement (Jiahua G grade), 30 parts of high temperature stabilizer (micro silica fume), 5 parts of fluid loss reducer (DZJ-Y), 38 parts of water, 0.2 parts of defoamer, 1.2 parts of dispersant, 1.5 parts of retarder, 3 parts of plasticizer A, 5 parts of nanofiller;
[0071] The preparation method of the elastoplastic cement slurry is the same as in Example 1.
[0072] The prepared cement slurry has a density of 1.90g / cm 3 , 80°C and 20MPa environment for 72 hours, measured elastic modulus 8.6GPa, Poisson's ratio 0.18, permeability 0.08mD, compressive strength 28MPa, tensile strength 4.5MPa.
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