In a horizontal well, the mud filtrate will sink below the well, leaving hydrocarbons above it.
在水平井中，泥浆滤液会沉到井底，碳氢化合物则在泥浆滤液上面。
Study of mud filtrate invasion on reservoir is helpful to identify oil, gas and water zones correctly.
钻井泥浆滤液储层侵入研究有助于正确识别油气水层。泥浆侵入较浅时，可以利用测井响应识别部分油层；
The mud cake which permeability is very low can prevent mud filtrate from invading further the formation.
泥饼的渗透率较低，能阻止泥浆滤液进一步渗入地层。
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