Aiming at the technical problems such as fluid loss reduction, rheology and inhibition coordination, and well wall stability of ultra-high density drilling fluid system under high temperature and high pressure conditions, the ultra-high density composite brine drilling fluid system with a density of 2.6g/cm3 was developed by carrying out research work such as optimization of high-temperature resistant drilling fluid treatment agent, optimization of drilling fluid particle size distribution, and optimization of drilling fluid system composition.
|
項目 |
AV mPa•s |
PV mPa•s |
YP Pa |
FLAPI mL |
180℃FLHTHP mL |
200℃/16h后 巖屑回收率 % |
潤滑系數 |
備注 |
|
數據 |
149 |
93 |
56 |
0 |
-- |
-- |
0.09 |
室溫 |
|
136 |
89 |
47 |
0.2 |
15.0 |
98.0 |
0.10 |
200℃/16h |
The ultra-high temperature brine system provides:
- Strong salt resistance
- Good compatibility
- A wide range of applicable densities improves the problem of barite settling
- Good thermal stability under high temperature and pressure conditions
- Strong anti-pollution ability, good anti-pollution ability to inferior soil, bivalent ions and formation gases
- Drilling fluid rheology can be controlled
High temperature and high pressure filtration loss is small, mud cake is thin