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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 8 Influence of organic clay on performance of biodiesel-based drilling fluid
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Organic
clay | 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 | HPHT
filtrate/mL | | OC16 | 2 | 43.0 | 38 | 5.11 | 5 | 4 | 2.0 | 2.5 | 2 035 | 18.1 | | 30 | 25.0 | 21 | 4.09 | 4 | 3 | 1.5 | 2.0 | | 65 | 14.0 | 11 | 3.07 | 3 | 2 | 1.0 | 2.0 | | OC18 | 2 | 46.0 | 40 | 6.13 | 6 | 5 | 2.5 | 3.0 | 1 653 | 22.2 | | 30 | 27.0 | 23 | 4.09 | 3 | 2 | 1.0 | 1.5 | | 65 | 12.0 | 10 | 2.04 | 2 | 2 | 1.0 | 1.0 | | ODC16 | 2 | 47.0 | 40 | 7.15 | 7 | 6 | 3.0 | 3.5 | 1 132 | 29.1 | | 30 | 31.0 | 26 | 5.11 | 4 | 3 | 1.5 | 2.0 | | 65 | 15.5 | 13 | 2.56 | 3 | 2 | 1.0 | 1.5 | | OTC16 | 2 | 52.5 | 43 | 9.71 | 8 | 7 | 3.0 | 3.5 | 791 | 32.0 | | 30 | 33.0 | 27 | 6.13 | 5 | 4 | 2.0 | 2.5 | | 65 | 16.0 | 13 | 3.07 | 3 | 2 | 1.0 | 1.5 |
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