throat radius

The pore structure features small pore throat radius and low height-wide ratio, and much fractal dimension, big capillary tortuosity and high pore-throat radius ratio.

孔隙结构特征表现为孔喉半径及其高宽比小，分形维数、毛细管弯曲度和孔-喉径比大。

The Cause and Countermeasure of Producing Over Cut in Cutter Radius Compensation in NC Milling PORE THROAT RADIUS TO COIL GYRATION RADIUS RATIO AS CHARACTERISTIC OF ADAPTIVITY OF POLYMER MOLECULAR MASS TO CORE PERMEABILITY

数控铣削中半径补偿产生过切的原因及对策聚合物分子量与岩心渗透率配伍性&孔隙喉道半径与聚合物分子线团回旋半径比

Factors that influencing the water blocking damage in low permeable and ultra-low permeable reservoirs are core permeability, core porosity and throat radius.

通过分析确定了影响低渗特低渗砂岩储层水锁损害的主要因素为岩心渗透率、岩心孔隙度和储层孔喉半径。

Permeability measured with gas has its limitation for low permeability reservoir, average throat radius is more suitable.

在低渗透储层的开发中使用气测渗透率有一定的局限性，应使用平均喉道半经；

The Calculation and Prediction of Transient Value of Nozzle Throat Radius

固体火箭发动机喷管喉径瞬变值的计算和预示

The sorting coefficient increases with permeability, and the relationship between the average throat radius and permeability are linear in logarithmic coordinates.

随着渗透率的增大，喉道分选性变差，并且平均喉道半径与渗透率在对数坐标系中具有较好的线性关系。

Selection and Orifice Diameter Calculation for Safety Valve IDENTIFICATION OF THROAT RADIUS VARIATION FOR SRM

安全阀的选用及喉径计算

Based on the competent sandstone electric conductivity model, the formal was acquired which can be used to compute the pore structure parameter including throat radius, capillary tortuosity and pore structure exponent by making use of the resistivity logging data.

依据致密砂岩电导模型获得了利用电阻率测井资料计算孔隙结构参数：毛管半径、孔喉迂曲度和孔隙结构指数的计算公式。

Nozzle flow field of SRM was numerically simulated with Fluent software. The effects of nozzle convergent half angle, radius of curvature on upstream of throat section and length of throat cylinder on flow field are investigated.

用Fluent计算流体力学软件对固体火箭发动机喷管流场进行了数值计算，研究了喷管收敛半角、喷管喉部上游圆弧曲率半径和喉部圆柱段长度对喷管流场的影响。

The solution is applicable for nozzles with any given contraction ratio n1, expansion ratio n2, and throat wall radius R.

精确解对任意给定的收缩比n1、扩张比n2和喉部壁面曲率半径R都适用。

Compared with low permeability glutenite, pore structure, relation of throat radius and permeability and separation of low permeability sandstone and low permeability tuffaceous sandstone is similar.

研究结果表明1.低渗透砂岩、低渗透凝灰质砂岩储层在孔隙结构类型、喉道与渗透率关系、分选性与渗透率关系等方面较为接近，而与低渗透砂砾岩相差较大。

The minimal value of porosity is around 2.5 % though throat radius method and porosity-water saturation method.

运用喉道半径法、孔隙度 - 含水饱和度法求得孔隙度下限值为2.5%.

According to the "bridging" principle, the relationship between the hydrodynamic radius ( R_ ( h)) of molecule that can block pore throat and the radius of pore throat ( R) is: R_ ( h) 0.46R.

根据架桥原理，可对孔喉形成较稳定堵塞的聚合物分子水动力学半径（Rh）与孔喉半径（R）的关系为：Rh大于0.46R。

Classification parameters for low permeability reservoir has been found, which is based on the impact of flooding efficiency and recovery percent, regarding penetration, movable fluid saturation, the average throat radius and the starting pressure gradient.

从渗透率、可动流体饱和度、平均喉道半径和启动压力梯度对低渗透储层驱油效率、采收率的影响程度出发，建立了低渗透储层分类的参数体系。

By diagenesis compaction and filling of clays, the formation of the reservoir is characterized by small pore throat radius, complex pore structures, rich irreducible water saturation, and small resistivity difference between oil layer and water layer.

后经成岩压实作用及粘土矿物的充填，造成孔喉半径变小，孔隙结构复杂，孔隙空间对水的滞留能力加强，束缚水饱和度高，油层与水层电阻率差别减小，电阻率增大指数小于3。

The minimum oil-bearing throat radius r_ ( hmin) and storage index β proposed by the author in the preceding paper [ 1] were used in calculation of 75 oil reservoirs in Liaohe, Changqing and Shengli oil fields.

本文对辽河、长庆和胜利油田75个油藏最小含油喉道半径（rhmln）及储油指数（β）进行了计算。

Estimation of average pore throat radius by NMR log data Hole Compensation Effect and A-site Radius Effect Studies on La-based Cuprate Superconductors

利用核磁共振测井资料计算平均孔喉半径铜氧化物高温超导体空穴补偿效应和A位平均离子半径效应研究

According to mercury injection data, the pore structure can be divided into two categories, micro-throat and thin-throat, but they have some common characteristics: pore throat radius is too small, poor connectivity and strong microscopic heterogeneity.

根据压汞资料可将储层孔隙结构分为微喉道和细喉道两类，但总体上具有孔喉半径偏小、连通性差、微观非均质性强的特点。