COMPATIBILITIES AND INTERACTIONS Compatibility with Shale

taotao477 · 发表于 2012-1-5 03:42:00

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FORMATEMANUAL_B11_Compatibility_with_shale.pdf (1.02 MB, 下载次数: 9)
The problem of wellbore instability in shales is one of the largest sources of lost time and trouble cost during drilling. Operational problems that derive from such instabilities range from high solids loading of the mud requiring dilution, to hole cleaning problems due to reduced annular velocities in enlarged hole sections, to full-scale stuck pipe as a result of well caving and collapse [1]. Although borehole stability problems can be problematic in oil-based and synthetic-based muds, the main problem area lies with water-based muds. Adverse interactions between water-based muds and troublesome shales have lead to the development of a whole range of additives that are supposed to serve as shale inhibitors in water-based muds. Many of these additives are shale specific and others are limited to certain operating conditions. Some inhibitors may be useful for stabilizing cuttings, but may also have no effect, or even an adverse effect, on actual borehole stability.

zhyq1013 · 发表于 2013-1-26 10:29:41

谢谢！！

夏阳 · 发表于 2013-1-27 00:32:55

页岩气

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