Zhou Z.,Kueler |
Zhang H.,Kueler |
Lu H.,Kueler |
Wang Z.,Kueler |
Drilling Fluid and Completion Fluid | Year: 2012
The lost circulation in fractured and cavernous formations is controlled normally by high concentration LCM sealing mud. The engineering fiber FCL is a kind of novel fiber material, which the average diameter is 10 μm-20 μm, the length is 8 mm-12 mm, the concentration is 0.8%-1.0%, and it can be used at 170°C. The active mechanism and sealing effect evaluation experiments of FCL fiber are developed in this paper, and it is applied in 11 wells, 9 of that are successful, which the success rate is over 81%.