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High density cement slurry system
Summary：High density cement slurry system is based on the principle of particle gradation, preferably a certain density and particle size of the weighting material, can be prepared according to the requirements of the density of 2.0-2.8g/cm3 of cement slurry, applicable temperature range of 20-180 ℃.
High density cement slurry system is based on the principle of particle gradation, preferably a certain density and particle size of the weighting material, can be prepared according to the requirements of the density of 2.0-2.8g/cm3 of cement slurry, applicable temperature range of 20-180 ℃.
Since the first use of high-density anti-channeling cement slurry with 193.7mm suspension (4049.45-5458.34m) in the active gas layer of Well Yuanba 3 on March 14, 2008, 181 wells have been cementing with high-density cement slurry. The qualified rate was 98.34 %, and the excellent rate was 65.19%.
Among the high-density cement slurries that have been used, the highest density is the ultra-high density cement slurry with a density (average) of 2.75g/cm3 (construction density: 2.67-2.82g/cm3) used in the 244.5mm casing single-stage cementing of well Wen 72-421 in Zhongyuan oilfield on December 12, 2013, with excellent cementing quality.
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