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The biodiesel-based flat-rheology drilling fluid system
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JIANG Guancheng,SHI He,HE Yinbo
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Table 11. Anti-seawater performance of biodiesel-based flat-rheology drilling fluid
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Seawater
addition/
% | Rheology test
temperature/°C | Apparent
viscosity/
(mPa·s) | Plastic
viscosity/
(mPa·s) | Yield
point/
Pa | Φ6 | Φ3 | Initial gel
strength/
Pa | Final gel
strength/
Pa | Emulsion-
breaking
voltage/V | API
filtrate/
mL | HTHP
filtrate/
mL | | 5 | 2 | 53 | 43 | 16.86 | 10 | 9 | 4.5 | 5.0 | 1 565 | 1.8 | 8.1 | | 30 | 44 | 26 | 4.09 | 8 | 7 | 3.5 | 4.5 | | 65 | 23 | 15 | 3.58 | 8 | 7 | 3.5 | 4.0 | | 10 | 2 | 64 | 52 | 20.44 | 14 | 13 | 6.0 | 7.0 | 974 | 2.2 | 10.3 | | 30 | 49 | 40 | 15.84 | 19 | 17 | 5.0 | 6.0 | | 65 | 34 | 27 | 10.22 | 14 | 13 | 6.0 | 6.0 |
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