The impact of starting pressure gradient must be considered due to existence of starting pressure gradient and recovery difficulty during the development of low permeability oil reservoirs.
低渗透油田由于存在启动压力梯度，开采难度很大，因此，在低渗透油田开发时必须考虑启动压力梯度的影响。
Terrestrial stress is a main control on hydrostatic head of reservoir, and its gradient powers oil, gas and water migration.
地应力是影响储层沉积水水头的主要因素，地应力梯度是油气水运移的主要驱动力。
Multiple tests can be performed to measure formation pressure, and the formation pressure gradient can be established, accordingly, interface between oil, gas and water can be identified.
可以进行多次压力测试以建立地层压力梯度，从而判断油、气、水界面。
An available method of screening oil-philic bacteria has been constituted through gradient tame, semisequencing-UV-mutagenesis and gradient concentration retame.
通过梯度浓度驯化、半连续紫外诱变、梯度浓度再驯化，建立了一套可操作的嗜油细菌筛选办法。
Aim To resolve the influence of pressure gradient, liquid hold-up and mixture density of the different flow model on the design and operation of gas-lift well in oil recovery.
目的解决深井气举采油过程中不同流动型态的压力梯度、持液率、混合物密度对气举井设计和运行影响的问题。
The coal liquefaction oil was separated using gradient elution method and the aromatics were analyzed by gas chromatography and mass spectrometry (GCMS) and 1Hnuclear magnetic resonance (1HNMR).
采用梯度洗脱技术对煤液化油进行了分离，并对芳烃部分进行了气相色谱质谱（GCMS）和核磁共振氢谱（1HNMR）分析。
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.
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。
The calculation method of microcosmic starting pressure gradient is put forward based on the model of pipe flowing and rheological behaviour of conventional heavy oil.
利用微观尺度管流模型，结合普通稠油流变特征，提出了在考虑稠油流变性条件下微观启动压力梯度计算方法。
This method can be used for conventional heavy oil reservoir to calculate ultimate drainage radius and reasonable well spacing through starting pressure gradient.
将研究结果应用于普通稠油油藏，给出了利用启动压力梯度确定极限泄油半径及合理井距的理论计算方法。
It may be concluded that the sedimentary facies, tectogenetic movement, the formation water and geothermic gradient are all important factors to form the oil-bearing sandstone.
结果表明，沉积相、构造运动、地层水的性质及地温梯度等都是促成含油砂岩形成的重要因素。
Lastly, the effects of initial oil saturation gradient on them are discussed.
进而又研究了初始饱和度梯度对试井规律的影响。
The gradient of the tectonic additional hydrostatic pressure is the main cause of the long-distance migration of the fluid, oil and gas.
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。
At present, the studies of starting pressure gradient in home and abroad are main focus on single phase and water-oil two-phase and there are a few studies of gas-oil two-phase.
目前，国内外对启动压力梯度的研究主要集中在油水两相中，对于油气两相启动压力梯度研究很少。
The starting pressure gradient increases with the decrement of oil saturation;
随含油饱和度的降低而增加；
The starting pressure gradient increases with the decrement of oil saturation;
随含油饱和度的降低而增加；
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