浅谈国储库建设工程项目管理

粮库建设项目的管理，虽然属于建筑产品这一工程项目的管理范畴，由于国家储备粮属于重要的战略物资，粮库建筑有其特殊的属性，是以安全存储散粮为目的的专用建筑物。就粮库建筑特殊性，利用经济管理理论，结合新沙港粮库扩建工程实际，介绍国储库建设工程项目管理的一些经验，对今后粮库建设与项目管理具有借鉴意义。     

基于灰色聚类的黄河防汛物资分类储备模型研究

对黄河防汛抢险物资进行分类是科学储备黄河防汛抢险物资的前提和基础。通过综合考虑物资的重要性、储备性、成本性和社会性,结合黄河防汛抢险的特殊性,建立了黄河防汛物资分类指标体系,采用灰色聚类的方法对防汛物资进行分类,针对各类防汛物资的特点和实际需求,提出相应的管理策略,提高防汛物资保障能力,为黄河防汛物资的科学储备提供依据。     

油气田产量预测的新模型

基于累积产量随时间递增的信息特征及对以往产量预测模型的研究，建立了一种预测油气田产量、累积产量和可采储量的新模型。该模型可以对油气田开发全过程的开发指标进行拟合与预测，并可简化为Logistic模型和胡一陈模型。用前苏联巴夫雷油田和北斯塔夫罗波尔一佩拉基阿金气田的实际数据验证的结果表明，该模型预测精度较高。表2参10     

类比法计算天然气可采储量

在动态资料缺乏的情况下,应用类比法求采收率是一种简便、快速的计算方法。通过选取合适的参数以及适当的方法,依然可以获得理想的结果。预测油田原始可采储量方法分为动态法和静态法,动态法包括驱油效率法、产量递减法、水驱曲线法等;静态法包括类比法、相关经验公式法、地质综合评价法、经验值法等。其中类比法是一种相对简单而且实用的逻辑推理方法。以喇嘛甸油田萨零组北块为例,运用类比法估算天然气原始可采储量,并通过经验值法进行验证。     

锰矿资源现状及开发利用思考

锰在地壳中大量存在,广泛用于钢铁、冶金、电子、化工等行业和部门。世界锰矿资源总量比较丰富,但分布不均,南非、乌克兰和巴西的资源总量占世界总量排名前三。我国锰矿资源分布不均,且以贫矿为主,平均品位差,这是我国锰资源消费得不到满足的一个主要原因。近年来,通过开展找矿突破战略行动,锰矿找矿实现了重大突破,在贵州铜仁还有望形成新的锰矿资源基地。2009~2012年,全球锰矿产量总体呈上升趋势,开采量总体保持平稳,而进口方面,南非也已经超越澳大利亚成为我国锰矿最大供应国。基于当前锰矿仍为我国短缺矿产,对外依存度高、需求量大等实际情况,本文在以上分析的基础上,提出了几点思考建议。     

永川煤矿延深区须六段砂岩储层特征及致密气储量估算

永川煤矿延深区煤系地层上覆须家河六段岩层含有大量气体。在实验室对须六段岩芯进行了化验分析,结果显示为长石岩屑砂岩层,结构成熟度为中到低,孔隙度平均3.98%,渗透率平均0.080506×10~(-3)μm~2,岩层内孔隙以微裂隙为主,含气饱和度平均84.3%,属于Ⅲ~Ⅱ类中等复合性储层类型的致密砂岩气藏。应用容积法计算表明该矿延深区须六段致密砂岩气地质储量为12.84×10~8 m~3,丰度为1.712×10~8 m~3/km~2。可在井下应用水力压裂技术对岩层增透,结合瓦斯负压抽采系统,对须六段岩层致密气进行开发。     

Recoverable shear strain of liquid crystal‐forming concentrated hydroxypropyl cellulose solutions

The recoverable shear strain (S_R) for the liquid crystal‐forming hydroxypropyl cellulose solutions was determined by means of a concentric cylinder rotational apparatus as functions of shear stress prior to recovery and concentration of the solutions at 30°C. S_R greatly depended on shear stress and concentration; the phase of the solution (the single phase or biphase) governed the dependences of S_R on stress and concentration. S_R increased with increasing stress for the single phase and decreased for the biphase. S_R seemed to be related to the die swell (B): S_R ∝ Bⁿ. S_R exhibited a maximum and a minimum with respect to concentration. S_R for the cellulosic cholesteric liquid crystalline solutions was greater than that for the isotropic solutions. A model was proposed for explaining the greater S_R. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 865–872, 2002     

近年来国内各油公司勘探活动特点

近年来,国内各油公司都相当重视勘探工作。勘探活动总的来说具有以下五大特点:矿权面积不断扩大,资源量有所增长;勘探工作锁定在各含油气盆地的前陆盆地、古隆起、大面积地层岩性带和富油凹陷四大领域,突出预探;立足富油凹陷,注重老油区扩展,减缓老区产量递减;石油储量高基值平稳增长,产量稳中有升;开始重视天然气勘探,天然气储量快速增长。     

The influence of hydroelectric power generation on the body composition of juvenile Atlantic salmon

The fat and protein content, and thus energy resources of young (parr) Atlantic salmon (Salmo salar) were examined in a temperate river. Juvenile salmon exhibited distinct seasonal patterns of energy storage and use. The lowest levels of energy were found towards the end of winter (mean mass specific energy about 4.3 kJ·g^?1). There was a rapid accumulation of fat in spring/early summer in spite of low‐water temperatures (highest mean content of mass specific energy of about 5.0 kJ·g^?1 in June). By early autumn (August) there was a rapid depletion of fat and energy resources. The decline in specific energy during late summer was of the same magnitude as the corresponding winter decline. Furthermore, total fat and protein content, and thus energy resources of juveniles below a hydroelectric power plant (hydrostation (HS)) differed from those at a (lower) reference station (RS). The younger fish exhibited higher gains, but also larger losses of energy resources compared to corresponding values at the RS. Specifically during the summer, young of year (YOY) had 31% lower total energy content at the regulated site (mean 1.27 kJ per individual) than the RS (mean 1.84 kJ). Higher mortality may occur at the site most affected by the hydroelectric plant, where energy resources on average were higher, but where depletion was also most severe. Copyright © 2006 John Wiley & Sons, Ltd.     

解析三角截柱法储量计算

通过对勘探工程中相邻最近三工程控制的矿块即三角截柱体的空间解析计算，进而对整个矿区进行高精度的储量计算，可以得到比传统方法更高的计算精度，并使储量计算走上微机化的道路。