断裂带作为油气散失通道的输导能力

通过断裂散失的油气量主要与断裂带的输导能力、实际进入断裂带的油气量、断裂通道的长度、散失时间和储层分流系数等参数有关。断裂带输导能力的主要因素是断裂带的宽度和储层渗透率。利用断裂散失模型计算了不同规模的断裂带作为油气散失通道的输导能力。计算结果表明 ,大型断裂带输导油气的能力远大于储层输导油气的能力。断裂活动期进入“通天”大断裂带的油气主要趋于散失 ;小断裂由于储层的分流作用 ,即使在活动期 ,它作为油气散失通道的作用也是有限的 ,其油气的散失量可以忽略不计。     

A RAPID APPROXIMATION FOR PREDICTING THE HYDROCARBON DISCOVERY RATE: PART 1. ASSESSING THE ACCURACY

The hydrocarbon discovery prediction problem is important to firms having to make decisions about the deployment of scarce exploration resources. Traditional methods for estimating the discovery rate rely on the completion of time consuming simulation experiments. A rapid approximation that does not require the completion of simulation exists and has been shown to have some promise as a prediction tool. This paper investigates the accuracy of the approximation method under a wide variety of distributional and drilling efficiency assumptions. The results indicate that the approximation produces predictions close to those of simulation under most of the tested conditions. This suggests that resource exploration firms could conveniently use the method for a wide variety of planning purposes without incurring the same costs in time and personnel required for simulation.     

On the retrograde condensation of one or two liquids

This contribution discusses the phenomena of retrograde condensation of one or two liquids. It w1 be shown that both phenomena can be well understood. Also the relation of retrograde condensation of one liquid phase with the condensation behavior of natural gas will be discussed. Similarly that of two liquid phases with multiple phase behavior occurring in low temperature reservoir fluids will be pointed out.     

层流液柱吸收法测定气体在液相中的扩散系数

采用射流吸收的简捷方法，通过测定由Ｓｈｏｕｔｈｗｅｌｌ型孔板所产生的截面速度均匀的层流喷射液柱所吸收的气体量，由渗透理论所导出的模型，可计算出一定温度、压力下的微溶气体在液相中的分子扩散系数Ｄ。在温度为３０～４５℃的范围，测试结果与文献值吻合良好．     

A computational study into the reactivity of epichlorohydrin and epibromohydrin under basic conditions in the gas phase and solution

Ab initio molecular orbital calculations were carried out on epibromohydrin (EBH) and epichlorohydrin (ECH) in an attempt to elucidate their reactivity with respect to a hard nucleophile, hydroxide. These systems were modeled in both the gas phase and a polar solvent under basic conditions. In the gas phase, it was determined that a direct displacement mechanism (nucleophilic attack at the C1 position) was operative for EBH, while an indirect pathway (nucleophilic attack at the C3 position and subsequent intramolecular displacement) was followed for ECH. In an acetone solution, only the indirect displacement mechanism was found to occur. An electrostatic argument is advanced to account for this behavior in polar solution. Copyright © 2007 John Wiley & Sons, Ltd.     

热等离子体裂解天然气制备C2烃

采用氮气热等离子体来裂解天然气制备乙炔乙烯,着重研究了天然气转化率和乙炔、乙烯收率随氮气流量和天然气流量的变化.结果表明,天然气流量与氮气流量之比为11时,可得到较好的结果.当等离子体功率为15kW、天然气流量为3Nm3*h-1、氮气流量为3Nm3*h-1时得到最好的结果.这时天然气转化率为57%,乙炔、乙烯的收率分别为34%和9%;乙炔在反应气中的体积浓度为7.5%,与部分氧化法相似;扣除不参加反应的氮气,乙炔在气相产品中的体积浓度为13.2%,与热力学平衡计算结果基本符合.     

气体催化裂解法制备高纯碳纳米管的研究

利用有机气体化学裂解技术 ,用二甲苯作碳源 ,二茂铁作催化剂 ,噻吩作助长剂 ,氢气作载气 ,对碳纳米管的制备进行了研究 .研究结果表明 ,二甲苯流量、氢气流量及有机气体裂解温度等工艺参数对碳纳米管的产量及形态有很大的影响 ;在反应温度为 10 0 0～ 110 0℃ ,氢气流量为 15 0mL·min- 1,二甲苯的流量为 0 .12 1mL·min- 1时 ,能获得直径为 4 0～ 10 0nm的碳纳米管 ,碳纳米管的纯度可达 95 %以上 .