Overview：

THERMDRILL HTHP water-based drilling fluid system has been developed with optimized weighting material, stable rheology at high-temperatures and settlement resistance technology. It is suitable for HTHP exploration and development projects of deep / ultra-deep wells. The system has successfully applied in the Yinggehai Basin in the South China Sea and also in the Tarim Basin in Xinjiang.

Applicability：

Temperature: 150~220 ℃；Density: 1.1~2.4 g/cm3

Characteristics：

Stable rheology at high temperatures；Good settlement resistance of weighting agent；Stable mud system at high temperatures；Strong tolerance on contaminations.

Operation background:

HTHP wells in the west of the South China Sea:the well drilling fluid has stable rheological properties,the funnel viscosity changes little; after using high-quality barite for weighting, the viscosity changes less than that of ordinary barite barite for weighting; on-site drilling fluid has strong anti-pollution ability, no complications occurred in the whole well section.

Homework results:

high temperature：190 ℃

high pressure：2.23 g/cm3

well depth：4098 m

Homework results:

1、The rheological property of drilling fluid is stable；

2、Strong anti-contamination ability of on-site drilling fluid;

3、No complications occurred in the whole well；