从应力波表层损伤理论分析了混凝土表层“开坑区”的侵彻特性，提出“简化等效阻力线”的计算方法；
Penetration performance in surface layer of concrete target was analyzed by stress wave damage theory, calculating method base on "simplified equivalent resistance line" was presented.
针对吉林英坨东地区低渗透油田特点 ，应用微差识图、无侵线等方法综合研究油水层识别问题。
To apply differential analysis and non invasion line in low permeability oil fields, this paper presents a method for identifying oil water in reservoirs.
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