将盆地流体类型分为表生渗入流体、自生流体和深部外来流体3种，并简述了这3种流体的基本特征。
Fluids can be divided into 3 types, namely, supergene infiltration fluid, authigenic fluid and deep extraneous fluid, and their basic features are described.
引起水洗油层变化的主要因素是：油层含有敏感性矿物，孔隙结构的非均质性，以及外来流体矿化度的变化。
It is held that the causes of leading to the variation are the sensitive mineral existing in the reservoir, the heterogeneity of the pore structure and the change of the salinity of foreign fluid.
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