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driving pressure gradient
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  驱动压力梯度
     The change of adsorbed water layers at the fine glass bead surface with centrifugal rotation speed was investigated by experiment. The empirical relationship for the thickness of the adsorbed water layers and driving pressure gradient was given.
     以玻璃微珠表面吸附水层随离心转速的变化实验为基础,得到了吸附水层厚度与驱动压力梯度的经验关系公式。
短句来源
     The results of experiments suggest that raising the discharge speed,reducing the intrude depth of outside fluid including drilling liquid,raising the driving pressure gradient during water driving can lighten the degree of water blocking damage.
     由实验可知,提高返排速度,减小钻井液滤液等外来流体侵入的深度,在水驱过程中提高驱动压力梯度可减轻水锁损害;
短句来源
     Based on theory of fluid flow mechanics, the pressure gradient distribution equation between injector and producer under unequal production rate is deducted, by which the change of driving pressure gradient with well spacing under available injector-producer conditions can be determined.
     利用渗流力学理论,推导了不等产量下注采井之间的压力梯度分布公式,可以确定在一定的注采条件下,驱动压力梯度随井距的变化关系。
短句来源
     Study shows that such a relationship between injector and producer is not established until the driving pressure gradient completely overcomes the starting pressure gradient of reservoirs. Hence, the injection-production well spacing corresponding to the minimum driving pressure gradient in overcoming the maximum starting pressure gradient should be a proper maximum injection-production well spacing that the pay zone can be effectively produced.
     渗流规律研究表明,只有当驱动压力梯度完全克服油层启动压力梯度后注采关系才能建立,因此,克服最大启动压力梯度的最小驱动压力梯度所对应的注采井距即是油层能够动用的最大注采井距。
短句来源
  “driving pressure gradient”译为未确定词的双语例句
     2. Rectified the expression by which the change of driving pressure gradient with well spacing under available injector-producer can be determined.
     2、利用渗流理论推导了不同注采条件下的驱替压力梯度分布表达式,建立了技术极限井距的确定方法,完善了驱替压力梯度的计算公式。
短句来源
     The effects of many factors on waterflooding in Ansai extra low permeability oil field, such as the stronger heterogeneity of reservoirs, the bigger starting pressure difference and driving pressure gradient, the natural fracture development and the declining productivity index after water breakthrough are getting increasingly strong.
     安塞油田特低渗透油藏的非均质性较强 ,注水开发启动压力梯度大、天然微裂缝较发育和油井见水后采液、采油指数下降等因素对注水开发效果的影响日益突出。
短句来源
  相似匹配句对
     THE PRESSURE GRADIENT IN THE LITHOSPHERE
     岩石圈中的地压梯度
短句来源
     pressure;
     压力;
短句来源
     Expressions for Pressure-Velocity-Gradient Correlations
     脉动压力脉动速度变形平均项的表达式
短句来源
     The driving force depends on the pressure distribution.
     该推动力的大小由压力分布决定。
短句来源
     Estimation of Pore Water Pressure in the Pile Driving
     打桩排土孔隙水压力的估算
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  driving pressure gradient
We attribute the observed thickness pattern as evidence of a driving pressure gradient, which is caused by decreasing host rock shear modulus and horizontal stress, both due to decreasing emplacement depths beneath the sloping flanks of the volcano.
      
It is shown that if the driving pressure gradient exceeds a critical value (the local shear stress maximum of the steady stress vs.
      
The new method determines optoelectronically the passage of each individual cell through a singlepore membrane (6 μm diameter and 50 μm length) under a driving pressure gradient (Δp=100 Pa, τ=3 Pa).
      
An increase in auto-PEEP effectively decreases the driving pressure gradient, and thus the VT decreases.
      
A related classic MHD boundary layer problem in a rectangular duct is traditionally formulated for a constant driving pressure gradient.
      


A new method for multi pulse pasty propellant rocket motor design was proposed by analyzing flow,heat transfer,ignition,combustion and extinction of a non Newtonian pasty propellant,in which the oxidizer and fuel were mixed uniformly.The key technology of the new method was the design of a re ignitable igniter.The two dimensional flow and heat transfer models of the propellant inside the re ignitable igniter were established and the control equations were solved numerically.The relationship among the igniter...

A new method for multi pulse pasty propellant rocket motor design was proposed by analyzing flow,heat transfer,ignition,combustion and extinction of a non Newtonian pasty propellant,in which the oxidizer and fuel were mixed uniformly.The key technology of the new method was the design of a re ignitable igniter.The two dimensional flow and heat transfer models of the propellant inside the re ignitable igniter were established and the control equations were solved numerically.The relationship among the igniter temperature,igniter length,diameter and drive pressure gradient for the reliable ignition and extinction were obtained.The variation of combustion chamber temperature was analyzed to determine time interval between two performances.A set of demonstration proto type test apparatus were also built for multi pulse firing.Some seven work pulses were obtained.Each pulse lasted about five seconds and the time interval of each pulse was about two seconds.

提出了一种新的膏体推进剂脉冲火箭发动机设计方案及其再点火装置的设计与实现,建立了膏体推进剂在再点火装置中二维流动模型和传热模型,得到了发动机可靠点火时再点火装置温度、长度、通道直径和挤压压强间应满足的关系,以及发动机熄火应满足的条件,还进行了原理性热试车,成功实现了多脉冲工作。

The reasonable well pattern disposition is a key factor that ultra low permeability oil field is developed successfully because it is usually relative to fracture. This paper presents that the reverse rhombus 9 spot and rectangle well pattern match best the fracture and injection production pressure systems. This is the result of reservoir engineering study including numerical simulation, driving pressure gradient analysis etc, and reviewing the evolution of well pattern for Changqing ultra low permeability...

The reasonable well pattern disposition is a key factor that ultra low permeability oil field is developed successfully because it is usually relative to fracture. This paper presents that the reverse rhombus 9 spot and rectangle well pattern match best the fracture and injection production pressure systems. This is the result of reservoir engineering study including numerical simulation, driving pressure gradient analysis etc, and reviewing the evolution of well pattern for Changqing ultra low permeability oil field. In development practice, reverse square 9 spot, reverse rhombus 9 spot and rectangle well pattern were adopted according to little, fair and well developed fracture systems, which produced evident effect.

根据长庆油区特低渗透油田开发实践 ,运用数值模拟、驱动压力梯度研究等油藏工程方法 ,按照最佳配置裂缝系统、井网系统、注采压力系统的原则 ,提出 3种井网形式 ,即正方形反九点、菱形反九点和矩形井网。在油田开发实践中 ,根据裂缝不发育、较发育和发育 3种不同情况 ,分别采用正方形反九点、菱形反九点、矩形井网形式开发 ,取得了明显效果。

The effects of many factors on waterflooding in Ansai extra low permeability oil field, such as the stronger heterogeneity of reservoirs, the bigger starting pressure difference and driving pressure gradient, the natural fracture development and the declining productivity index after water breakthrough are getting increasingly strong. On the basis of Pressure Superposition Principle, the formation pressure distribution, the pressure difference and pressure gradient between...

The effects of many factors on waterflooding in Ansai extra low permeability oil field, such as the stronger heterogeneity of reservoirs, the bigger starting pressure difference and driving pressure gradient, the natural fracture development and the declining productivity index after water breakthrough are getting increasingly strong. On the basis of Pressure Superposition Principle, the formation pressure distribution, the pressure difference and pressure gradient between producers and injectors were established, and the reasonable well array spacing and the effective driving pressure system were determined by using the start up pressures gained from laboratory experiment and on site measurement. These methods, combined with some other adjusting techniques of waterflooding, such as forced waterflooding, non steady waterflooding, line waterflooding along the fracture, adjusting injection and production profile and infill drilling along the fracture, have provided good result in stabilization of oil production.

安塞油田特低渗透油藏的非均质性较强 ,注水开发启动压力梯度大、天然微裂缝较发育和油井见水后采液、采油指数下降等因素对注水开发效果的影响日益突出。应用压力叠加原理研究地层压力分布规律 ,计算注采井间压力及压力梯度分布曲线 ,结合室内试验及现场测试确定的启动压力梯度值 ,确定建立有效驱替压力系统的合理排距 ,开展以强化注水、不稳定注水、沿裂缝线状注水、注水产液剖面调整为主的注采调整以及裂缝侧向加密调整 ,取得了明显稳产效果。

 
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