Under DC voltage the restraint and time lag phenomena of partial discharge (PD) in cavities or oil gap by X ray irradiation were investigated.
直流电压下X射线对气隙、油隙放电的激发过程存在明显的“滞后”现象，即：正极性电压下X射线照射首先抑制放电的发生；
The residuum oil pool mainly receives early oil entrance with chief of corroded pores, cavities and fractures formed during denudation stage as reservoir spaces.
风化壳体油藏主要接受早期进油，储集空间以剥蚀阶段形成的溶蚀孔、洞、缝为主；
The reservoirs in Tahe oil field are full of fractures and cavities and behave strongly heterogeneity both in vertical and lateral directions.
塔河油田奥陶系碳酸盐岩储层的裂缝及缝洞非常发育，在纵横向都表现出很强的非均质性。
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