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Ultra-high-density latex cement slurry system successfully implemented.
Summary：On December 12, 2013, our company’s independently developed ultra-high-density (2.80 g/cm³) latex-based cement slurry for preventing channeling was successfully applied in the cementing operation of the Φ244.5 mm casing at Well Wen72-421 in the Zhongyuan Oilfield. The construction process went smoothly, the slurry exhibited excellent fluidity, and the cement slurry density was uniform (with a maximum density of 2.82 g/cm³), resulting in high-quality cementing results.
On December 12, 2013, our company’s independently developed ultra-high-density (2.80 g/cm³) latex-based cement slurry for preventing channeling was successfully applied in the cementing operation of the Φ244.5 mm casing at Well Wen72-421 in the Zhongyuan Oilfield. The construction process went smoothly, the slurry exhibited excellent fluidity, and the cement slurry density was uniform (with a maximum density of 2.82 g/cm³). The cementing quality was outstanding.
Design concept:
① Based on the principle of particle gradation: effectively reduce the liquid-solid ratio (keeping the L/S ratio at 0.23), increase the solid-phase content and cement content, resulting in high compressive strength of the cement stone (26.5 MPa/25℃ × 0.1 MPa × 48 h) and excellent bonding quality.
② According to the density gradation principle: Reducing the density difference between solid phases results in good slurry settling stability (0.02 g/cm³).
Function and Significance:
① Successfully adapted latex cement slurry with a density of 2.80 g/cm³ from laboratory applications to field operations, providing both technical reserves and field experience for cementing under extreme conditions.
② The cement slurry materials have been fully localized, effectively shortening the construction period and reducing costs.
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