浅薄层稠油油藏资源二次利用的一种方法—加密井蒸汽吞吐

由于河南油田稠油油藏具有“浅、薄、稠、散”的特点，所以蒸汽吞吐平均6个周期后，开发指标和经济指标明显降低。蒸汽吞吐后剩余油分布为：100m×141m及五点法并网，剩余油分布较为集中，100m×100m反七点法并网，剩余油分布零散；经济分析结果表明：浅薄层稠油油藏加密井吞吐单井的经济极限产量为1200～1500t，当油层厚度大于5.0m、纯总厚度比大于0.5，以及单井控制死油区面积大于0．5×10－2km2，且死油区离边水距离大于150m时，可进行加密，加密井蒸汽吞吐采收率可达14％左右。不同并网的加密方式为：100m×141m及五点法井网，采用直并加密方式；100m×100m反七点法并网，采用水平并加密方式。     

Viscous flow through a bed of settled aggregates: Evolution of tubes void of particles

Observations show that, when a viscous fluid flows vertically through a bed of settled flocculated aggregates, particles are emerged from locations on the upper surface of the bed, as a volcano process, and hollow tubes are created in the bed though the latter remains basically stable. A theoretical model is presented to explain this odd phenomenon from the onset of particle motion to the development of the tubular cavities and the particles' deposits around them. Analytical and numerical calculations are performed to show fluid streamlines and particle trajectories.     

Evaluation of effect of paddle element stagger angle on the local velocity profiles in a twin-screw continuous mixer with viscous flow using Finite Element Method simulations

The effect of paddle element geometry, specifically a systematic change in stagger angle, on the velocity distribution of a Newtonian corn syrup was evaluated in the mixing region of a 2″ Readco continuous processor using 3D FEM simulations. Local velocities and regions of backflow were compared for three configurations of the paddle elements in the mixing region consisting of nine pairs of paddle elements with the central three being in a neutral (FLAT), staggered 45° forward (45F) or staggered 45° reverse (45R) configuration. The total material flow rate through the mixer was independent of the paddle element stagger but increased with screw speed when the mixer was operated with the barrel fully filled. The stagger angle variation caused only local disturbances in axial flow. The overall magnitudes of velocity were highest for the FLAT configuration followed by 45F and 45R. The local X and Y velocity components in the region of stagger showed no significant variation with paddle element stagger while the Z velocity component varied significantly in this region. Increased forward flow was seen for the 45F configuration while significant local backflow was seen for the 45R configuration at all positions of the paddle element rotation. The FLAT configuration had greater levels of pressure in the intermeshing region, suggesting a squeeze flow while there were not significant variations in pressure for the 45F and 45R configurations, suggesting a predominantly conveying/leakage flow in the axial direction. Variation in local flows is critical to good mixing.     

Installation of Torpedo Anchors: Numerical Modeling

Torpedo anchors are used as foundations for mooring deep-water offshore facilities, including risers and floating structures. They are cone-tipped cylindrical steel pipes ballasted with concrete and scrap metal and penetrate the seabed by the kinetic energy they acquire during free fall through the water. A mooring line is usually connected at the top of the anchor. The design of such anchors involves estimation of the embedment depth as well as short-term and long-term pullout capacities. This paper describes the development of a computational procedure that leads to prediction of torpedo-anchor embedment depth. The procedure relies on a computational fluid dynamics (CFD) model for evaluation of the resisting forces on the anchor. In the model, the soil is represented as a viscous fluid and the procedure is applied to axially symmetric penetration of the seabed. The CFD approach provides estimates of not only the embedment depth but the pressure and shear distributions on the soil-anchor interface and in the soil.     

ASTM D-5307 and ASTM D-7169 SIMDIS Standards: A Comparison and Correlation of Methods

TBP curves are essential in process simulators of the refining industry, particularly for the heaviest fractions of crude oils. ASTM D-7169 and ASTM D-5307 are standards used in simulated distillation analysis for fast characterization of these fractions. In this report, correlations to convert data from the first one to the second-mentioned standard are reported. These correlations were obtained from our analytical laboratory and pilot plant experimental data, gathered so far.     

硅油式防滑差速器特性对汽车操纵性能的影响研究

为了研究硅油式防滑差速器的转矩输出特性,通过电控动力传动系试验台对硅油式防滑差速器转矩输出特性进行了测定试验。通过仿真对比试验测定汽车转弯半径比、横摆角速度及侧向加速度等,并作为对比参数来考察硅油式防滑差速器转矩特性对汽车操纵稳定性的影响。仿真试验结果表明,若硅油式防滑差速器的防滑转矩设计合适,汽车装硅油式防滑差速器比装普通差速器更有利于汽车的操纵稳定性。     

Unsteady viscous flow over elliptic cylinders at various thickness with different reynolds numbers

Two-dimensional incompressible Navier-Stokes equations are solved using SIMPLER method in the intrinsic curvilinear coordinates system to study the unsteady viscous flow physics over two-dimensional ellipses Unsteady viscous flows over various thickness-to-chord ratios of 06, 08, 10, and 1 2 elliptic cylinders are simulated at different Reynolds numbers of 200, 400, and 1,000 This study is focused on the understanding the effects of Reynolds number and elliptic cylinder thickness on the drag and lift forces The present numerical solutions are compared with available experimental and numerical results and show a good agicement Through this study, it is observed that the Reynolds number and the cylinder thickness affect significantly the frequencies of the force oscillations as well as the mean values and the amplitudes of the drag and lift forces     

阶梯形件粘性介质压力成形的试验研究

介绿了用粘性介质压力成形（VPF）方法制造阶梯形件的工艺过程,通过调整压边力与介质注入压力的配合,分两步来控制板料的成形,成功地制出阶梯形零件。该方法在第一工步采用较小的压边力拉深预成形,使板料尽量流入型腔,第二工步则加大压边力和介质注入压力使板料最终贴模成形。结果表明采用这种新工艺成形的零件厚度分布均匀,减薄量小,表面质量好,尺寸精度高。     

旋转阻尼器系统计算模型与参数匹配分析

一种能控制盖板下落速度的旋转阻尼器的性能取决于其内部圆柱凸轮机构、弹簧与黏滞阻尼器。为计算旋转阻尼器系统的性能,对凸轮机构的传动作用与弹簧和黏滞阻尼器的输出特性进行分析;建立旋转阻尼器系统盖板下落过程的动力学理论计算模型,采用龙格-库塔法对该模型进行计算;应用该模型对旋转阻尼器各部件参数的匹配进行分析;通过实验验证该计算模型的准确性。结果表明：该计算模型可用于旋转阻尼器的参数匹配设计。     

高粘度系统油泵粘性摩擦功耗的探讨及应用

针对攀钢1450热轧板厂1250系统运行中存在的问题,对系统摩擦功耗进行了分析测试,发现油泵功率损耗较大;根据流体力学流体内摩擦定理及积分原理,对油泵粘性摩擦功耗进行了初步探讨;根据系统摩擦功耗测试和粘性摩擦功耗分析结果,提出系统改进方案并实施,改造效果较好;并发现油泵粘性摩擦功耗分析结果,对高粘度系统的精确设计有着十分重要的意义。