天津市2010年11月29日天然气供气达到453万m^3

近日多股寒风侵袭津门,导致本市气温下降,而全市天然气用气量却大幅向上攀升,2010年11月29日天津市天然气用量达到453万m^3,同比增长20％以上,创同期供气的历史最高纪录。     

哈尔滨市天然气供气管线二期工程开工建设

2008年9月10日．从哈尔滨中庆燃气公司了解到,为保证2009年哈尔滨市余下的50万户居民顺利进行天然气置换,日前,哈尔滨市天然气供气管线二期工程已紧锣密鼓地开工建设。该项目建成后．将实现哈尔滨市天然气管网对哈市辖区内90万户天然气用户用气量的稳定供应。     

中压单级供气技术在我市的推广和应用

1 前言 中压单级供气技术主要是将传统的城市中、低压两级供气管网系统发展为中压单级管网系统,延伸了中压管网的供气范围,减少了中压系统与用户供气之间的中间低压管网,从而达到扩大供气范围,提高使用效率,增强供气的稳定可靠性,降低管网成本,产生经济效益的目的。与传统的中、低压两级供气模式相比,中压单级供气的优越性已被业内人士所认识。     

浅析LNG在南京未来供气中的作用

1目前南京的管道供气组成南京的管道供气市场目前由西气东输天然气、轻油天然气改质气、上海梅山焦炉气组成,现在上海梅山日供焦炉气约10万m3￣15万m3左右,轻油天然气改质气用来作为调峰使用,以西气东输天然气为主。目前南京民用户已超46万户,截止到2006年3月11日,已置换成天然     

天津供气实施“压工保民”确保居民生活用气

从有关部门获悉,连日来伴随着入冬以来最大一次寒流的来临,天津市最低气温达到零下12度,居民生活和工业生产天然气日用气量快速攀升,进销气量出现缺口。为了确保居民冬季生活用气,从2009年12月19日起,天津市全面启动“压工保民”应急预案。     

邯郸市煤气公司全力做好2012年春节安全供气保障工作

邯郸市煤气日最高用气量达到39万m3,天然气日最高用气量在春节期间达到25万m3,为确保全市30万用户春节期间的安全正常用气,邯郸市煤气公司本着“服务民生、保障供气”的宗旨,周密部署,认真安排,全力以赴保障燃气安全正常供应。     

城镇CNG与LNG供气方案的经济分析

对城镇CNG与LNG非管输供气方案的气源价格，运输和储配站的投资等因素进行了经济性分析，并探讨了气源价格，运输距离，供气规划，用气规模对供气方案选择的意识。     

压缩天然气技术在城镇供气的应用

介绍了城镇压缩天然气（CNG）的生产、运输和减压等技术，结合实践，分析了城镇CNG供气技术的适用性。     

Developing an evacuation evaluation model for offshore oil and gas platforms using BIM and agent-based model

Accidents on offshore oil and gas platforms (OOGPs) usually cause serious fatalities and financial losses considering the demanding environment where such platforms are located and the complicated topsides structure that the platforms have. Conducting evacuation planning on OOGPs is challenging. Computational tools are considered as a good way to plan evacuation by emergency simulation. However, the complex structure of OOGPs and various evacuation behaviors can weaken the advantages of computational simulation. Therefore, this study develops a simulation model for OOGPs to evaluate different evacuation plans to improve evacuation performance by integrating building information modeling (BIM) technology and agent-based model (ABM). The developed model consists of four parts: evacuation model input, simulation environment modeling, agent definition, and simulation and comparison. Necessary platform information is extracted from BIM and then used to model the simulation environment by integrating matrix model and network model. In addition to essential attributes, environment sensing and dynamic escape path planning functions are developed and assigned to agents in order to improve simulation performance. Total evacuation time for all agents on an offshore platform is used to evaluate the evacuation performance of each simulation. An example OOGP BIM topsides with different emergency scenarios is used to illustrate the developed evacuation evaluation model. The results show that the developed model can accurately simulate evacuation and improve evacuation performance on OOGPs. The developed model is also applicable to other industries such as the architecture, engineering, and construction industry, where there is an increasing demand for evacuation planning and simulation.     

A condition assessment model for oil and gas pipelines using integrated simulation and analytic network process

Even though they are safe and economical transportation means of gas and oil products around the world, pipelines can be subject to failure and degradation generating hazardous consequences and irreparable environmental damages. Therefore, gas and oil pipelines need to be effectively monitored and assessed for optimal and safe operation. Many models have been developed in the last decade to predict pipeline failures and conditions. However, most of these models used corrosion features as the sole factor to assess the condition of pipelines. Therefore, the objective of this paper was to develop a condition assessment model of oil and gas pipelines that considers several factors besides corrosion. The proposed model, which uses both analytic network process and Monte Carlo simulation, considers the uncertainty of the factors affecting pipeline condition and the interdependency relationships between them. The performance of the model was tested on an existing offshore gas pipeline in Qatar and was found to be satisfactory. The model will help pipeline operators to assess the condition of oil and gas pipelines and hence prioritise their inspections and rehabilitation requirements.     

油气田硫酸盐还原菌控制技术应用探讨

在油气田开采、集输和气田水回注系统中,存在着各种微生物群体,包括硫酸盐还原菌、铁细菌以及其他微生物。其中,危害性最大的微生物就是硫酸盐还原菌(SRB)。通过对重庆气矿目前站场SRB分布统计分析,结合站场气田水处理工艺及油套管腐蚀状况,经分析对比现有多种生物腐蚀控制技术,推荐LEMUPZ-H物理法杀菌技术。现场应用表明,该工艺能有效杀灭和抑制气田水中SRB,对站场排污、气田水转输及回注系统均能起到较好的保护作用,是一种经济有效的应对SRB腐蚀的控制保护措施。     

克深气田油套窜通高压气井安全生产的思路及措施

在高压、高温油气井的生产阶段,环空异常持续带压将直接影响到气井和现场作业人员的安全,其中以油套窜通的类型最为严重。针对克深气田12口油套窜通高压气井的生产现状,分析了油套窜通给安全生产带来的突出问题,结合油套窜通高压气井所表现出的环空压力异常现象,根据其产量、油套连通性、关井井口压力及环空最大许可工作压力的关系对这类井进行分类分级管理,提出了安全生产的思路和具体措施,对油气田安全高效开发具有重要的意义,同时也可作为高压环空带压隐患井治理的参考准则。     

油气田地面建设项目的分阶段造价控制与管理

针对油气田地面建设项目的特点,对其建设项目在各阶段中如何实现造价控制和管理进行了分析,针对各阶段中造价控制的关键点和重要环节,提出了相应的控制措施和控制办法,以达到油气田地面建设项目能满足项目的投资控制目标和相应的经济效益的目的。     

Passive dissolution of hydrogen gas into groundwater using hollow-fiber membranes

A new hollow-fiber membrane remediation system has recently been developed to passively supply groundwater with dissolved hydrogen (H2) to stimulate the biodegradation of chlorinated solvents. Understanding the mass transfer behavior of membranes under conditions of creeping flow is critical for the design of such systems. Therefore, the objectives of this research were to evaluate the gas transfer behavior of hollow-fiber membranes under conditions typical of groundwater flow and to assess the effect of membrane configuration on gas transfer performance. Membrane gas transfer was evaluated using laboratory-scale glass columns operated at low flow velocities (8.6-12,973 cm/d). H2 was supplied to the inside of the membrane fibers while water flowed on the outside and normal to the fibers (i.e. cross-flow). Membrane configuration (single fiber and fabric) and membrane spacing for the fabric modules did not affect gas transfer performance. Therefore, the results from all of the experiments were combined to obtain the following dimensionless Sherwood number (Sh) correlation expressed as a function of Reynolds number (Re) and Schmidt number (Sc): Sh = 0.824Re(0.39)Sc(0.33) (0.0004相似文献   

油气管道风险指标体系及模糊综合评价模型

指出油气管道项目是典型的风险项目,风险分析是管道项目评估的重要内容,在分析油气管道项目风险因素的基础上建立起了风险评估指标体系,对层次分析法进行改进,用改进后的方法确定风险指标权重,建立风险等级评语集,并对项目风险进行定量评估.     

基于图像相关分析的砂土模型试验变形场量测

高分辨率数码相机的出现为砂土模型试验变形场非接触量测法的研究开发提供了一条简便经济而且实用的途径,在模型试验观测面上,不再需要布置嵌入式量测标志点或描画网格,直接用数码相机在试验各阶段拍摄照片,然后对照片序列进行图像相关分析,即可得出模型试验的变形场分布。利用图像匹配技术追踪模型上点的位移,借用FEM常用的等参单元的概念进行图像校准和应变计算,采用双线性插值技术可以实现微小变形量测,并提出同时用平移和旋转搜索方法,以适应砂土模型的变形特点。精度检验试验结果表明,一个像素以下的平移量测标准方差达到0.19个像素,数值试验表明,15°旋转刚体变形量测,非旋转搜索和旋转搜索的标准方差分别为0.49和0.08个像素。最后给出一个在砂土地基承载力离心机模型试验中的应用实例,分析结果包含砂土模型位移场、最大剪应变场和体积应变场的分布图。结果表明这一方法使得砂土模型局部化变形、剪切带和渐进破坏过程的量化分析成为可能。     

基于模糊综合评价的油气田开发项目管理评估研究

针对油气田开发项目的特点和具体管理实践,提出了一种运用模糊综合评价原理实现对油气田开发项目管理的综合评估方法.从油气田开发项目生命周期、油气田开发项目知识体系角度出发,构建了油气田开发项目管理评价指标体系,根据模糊综合评价原理,建立油气田开发项目管理模糊评价模型,结合油气田开发项目进行了实例运算,实现了对油气田开发项目...     

不同体位脉冲式冲管在调整新生儿PICC置管导管异位中的应用研究

目的:研究不同体位脉冲式冲管在调整新生儿中心静脉(PICC)置管导管异位中的应用效果。方法:临床纳入本院2013年11月-2018年5月收治的PICC置管患儿60例作为研究对象。其中2013年11月-2016年9月收治的30例PICC患儿作为对照组,采用常规置管方式进行PICC置管。2016年10月-2018年5月收治的30例PICC置管患儿作为观察组,采用不同体位脉冲式冲管进行PICC置管的异位纠正。观察两组患儿导管异位发生率、调整次数、导管异位纠正成功率、留置时间以及并发症发生情况。结果:观察组导管异位发生率仅为20.00%,明显低于对照组的46.67%(P<0.05)。观察组调整次数明显少于对照组,留置导管时间明显长于对照组(P<0.05)。观察组并发症发生率为6.67%,明显低于对照组的30.00%(P<0.05)。结论:采用不同体位脉冲式冲管可有效降低新生儿PICC置管中导管异位的发生率,提高异位导管纠正率,减少调整次数,延长留置时间,降低并发症发生率,值得临床应用及推广。