贯穿流体膜厚度无压力梯度。
There is no pressure gradient through the thickness of the film.
构造附加静水压力梯度是流体及油气长距离水平运移的主要原因。
The gradient of the tectonic additional hydrostatic pressure is the main cause of the long-distance migration of the fluid, oil and gas.
测试流体粘度的一种仪器，在实验中使流体在已知压力梯度或流速情况下流过已知直径的一段试管。
An instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter.
给出了极限井底流压和产量拐点的求解方法，分析了启动压力梯度、流体性质等因素对低渗透油藏油井产能的影响。
The effects of reservoir fluid property in high and low pressure and the starting pressure gradient on the percolation laws were taken into account in this model.
通过大量的室内实验，探讨了原油边界层厚度与毛管半径、压力梯度、流体粘度和组分的关系。
Through large amount of lab experiments, the relation of oil boundary layer thickness with capillary radius, pressure gradient, fluid viscosity and its composition has been discussed.
基于其启动压力梯度，推导出了宾汉流体的运动半径和运动边界压力求取公式在此基础上推导出了垂直井在稳态状态下的产能预测公式。
Moving radius and moving boundary pressure are derived based on its star-tup pressure gradient. Productivity of vertical wells is derived on the above three parameters.
②凝胶ZND是否能够形成隔断地层流体与井筒流体联系的隔断式凝胶段塞，所形成的凝胶段塞是否具有启动压力梯度及其调控措施仍需实验和现场试验证实；
However, it was still lack of systematic study of rheology of gel ZND. And the rationality, correctness and feasibility of the separating-type gel slug principle need to be verified yet.
②凝胶ZND是否能够形成隔断地层流体与井筒流体联系的隔断式凝胶段塞，所形成的凝胶段塞是否具有启动压力梯度及其调控措施仍需实验和现场试验证实；
However, it was still lack of systematic study of rheology of gel ZND. And the rationality, correctness and feasibility of the separating-type gel slug principle need to be verified yet.
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