凝析气井井筒动态预测方法

利用垂直管流公式,结合流体相平衡热力学闪蒸计算,运用状态方程模拟,给出凝析气井井筒动态预测新方法.根据该方法.结合油藏数值模拟计算的结果,可准确地预测不同生产时期凝析气井的井筒动态.     

荫罩黑化及DX气与煤气成分的探讨

本文介绍了彩色显像管荫罩黑化反应的机理,详细说明了DX气制气流程,以及DX气的成分对黑化膜品质的影响。计算分析了成分不同的煤气在制成DX气时的成分变化。同时还分析了黑化工艺和黑化设备对煤气成分波动的适应性,及在生产实践中改变DX气制气时的煤气空气对黑化膜质量的影响。     

Gas diffusion and dielectric studies of polystyrene‐fullerene compositions

Polystyrene‐fullerene compositions containing up to 0.45 mol % (3 wt %) fullerene C₆₀ were investigated. It was established that the addition of fullerene to polystyrene (PS) leads to an increase of molecular packing density and so influences the transport of small molecules through the polymer films. Gas diffusion through films of PS‐fullerene compositions is slower than through PS films, and gas separating properties of compositions are higher. Dielectric studies showed that the fullerene is distributed as clusters in the polymer matrix of solid composition prepared from a toluene solution of PS and fullerene. Heating without air to the temperature higher than PS glass transition leads to increasing relaxation time of α‐transition in PS of compositions containing >0.15 mol % (1 wt %) fullerene. This effect is caused by rather strong interaction of PS chains via fullerene molecules entered into the PS‐fullerene complex. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2946–2951, 2002     

Characterization of hollow fiber membranes in a permeator using binary gas mixtures

We have studied the CO₂/CH₄ mixed gas permeation through hollow fiber membranes in a permeator. An approach to characterize the true separation performance of hollow fiber membranes for binary gas mixtures was provided based on experiments and simulations. Experiments were carried out to measure the retentate and permeate flow rates and compositions at each outlet. The influences of pressure drop within the hollow fibers, non-ideal gas behavior in the mixture and concentration polarization were taken into consideration in the mathematics model. The calculation results indicate that the net influence of the non-ideal gas behavior, competitive sorption and plasticization yields the calculated CO₂ permeance in a mixed gas permeator close to that obtained in pure gas tests. Whereas the CH₄ permeance is higher in the mixed gas tests than that in the pure gas tests, as the plasticization caused by CO₂ dominates the permeation process. As a result, the CO₂/CH₄ mixed gas selectivity is smaller than those obtained in pure gas tests at equivalent pressures.The calculated membrane performance shows little changes with stage cut if the effect of concentration polarization is accounted for in the calculation. The integration method developed in this study could provide more accurate characterizations of mixed gas permeance of hollow membranes than other estimation methods, as our model considers the roles of non-ideal gas behavior and concentration polarization properly.     

Use of inverse gas chromatography to quantify interactions in amine cured epoxy resins

Flory–Huggins interaction parameters, λ, were determined for a series of probes in an amine cured epoxy resin matrix (433–493 K) and its precursors (324–363 K) by inverse gas chromatography (IGC). Hildebrand–Scatchard theory was combined with Flory–Huggins theory in order to estimate infinte dilution solubility parameters (δ₂) for the matrix and its precursors at 298 K. It was shown that the value of the solubility parameter for the cured resin matrix lies between those of its precursors. Compared to the majority of published work, an unusual aspect of this application of IGC is that solubility parameters have been determined when the stationery phases are (i) small molecules and (ii) a highly crosslinked polymer. Moreover, all possible attempts have been made to ensure equilibrium conditions between probe and stationary phase, and compensation for asymmetry of peak profile has been applied in determining δ₂. The solubility parameters estimated by IGC are in good agreement with those calculated by other methods.     

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本文简要介绍了国外在开发超酸性气体过程中遇到的材料选择、腐蚀监测、水化物堵塞、超酸性气的处理和加工等问题所采取的措施和办法。     

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通过对J.J.Arps方程的推导,提出了油气藏产量递减曲线分析的最佳拟合法。用该法可直接求出递减指数N、初始递减率D1及油气递减前的稳定产量Qi,避免了使用试差法的大量运算过程,大大提高了油气藏工程中指标预测的精度。     

如何调动加油站站长的工作积极性

根据加油站效益的增长关系到成品油销售企业生存与发展的重要地位，以及加油站站长职能逐步由管理向经营、经理人转变的实际情况，指出做好加油站的经营管理工作，最大限度地调动加油站站长的工作积极性是企业必须认真研究解决的问题。阐述了调动站长积极性应做好如下工作：建立优胜劣汰的站长选聘机制；赋予站长应有的管理权力；站长实行“特岗特薪”，体现站长责、权、利的统一；制定公平、客观的业绩考核激励机制；强化站长培训，提高站长的综合素质和专业技术水平。     

OFDM技术及其应用

首先对OFDM的发展以及应用做了简要的介绍,然后讨论了当前OFDM研究过程中的两个关键技术问题,最后展望了OFDM的未来发展。     

一种新型同位素示踪剂载体及应用

同位素沾污、低注井同位素示踪剂因沉降造成的上返速度慢或无法上返、大孔道地层同位素示踪剂失踪等是影响注水开发油田后期吸水剖面测井资料质量的主要问题。同位素示踪剂载体的物理参数，尤其是其密度，是产生上述问题的重要因素。通过对同位素示踪剂载体技术指标优选而生产的一种新型同位素示踪剂，可以解决低注井同位素上返速度慢的问题，并能有效识别大孔道地层，减少同位素沾污。这种同位素示踪剂载体已在河南油田吸水剖面测井中应用，并见到了很好的效果。