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 formation damage during drilling are recognized as 2 types: mud solid particles plug and mud filtrate invasion.
钻井过程中的油层污染可分为泥浆固相颗粒侵入和滤液侵入2种类型。
The downward vertical movement of filtrate with time after invasion.
泥浆侵入地层后的下沉垂直移动。
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