Solutions for the poor sedimentation stability of low-density cement slurry

Fluid loss additive CG212S is suitable for low-density cement slurry system, has obvious thickening and suspension effect, and solves the problem of poor stability of low-density cement slurry, making the low-density cement slurry have good thickening performance and the strength of cement stone develop quickly.

Difficulties

In cementing of low-pressure layers, loss-prone layers, especially fractured and cave-type carbonate formations, conventional cement slurry cementing is very likely to cause well leakage, resulting in cementing failure or unqualified cementing quality. The use of low-density cement slurry cementing can effectively solve the above-mentioned complex cementing problems and protect oil and gas reservoirs. Low-density cement slurry systems generally use increasing the liquid-solid ratio or adding low-density lightening materials to reduce the slurry density, which makes the slurry prone to stratification, sedimentation, large free water and large fluid loss. Therefore, it is crucial to solve the sedimentation stability of low-density cement slurry systems.

Features of anti-settling type fluid loss additive CG212S

Ø Applicable to low-density cement slurry (1.0~1.6g/cm³) system.

Ø It has obvious thickening effect, enhances the suspension stability of cement slurry system and prevents sedimentation.

Ø Good thickening performance.

Ø Cement stone strength develops quickly.

Ø Temperature resistance up to 180℃.

Solutions

Properties of CG212S in the Low-density Cement Slurry System