共查询到19条相似文献,搜索用时 46 毫秒
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山西分公司100M~2转鼓赤泥过滤机是引进法国道尔公司产品,用于拜耳法生产系统的赤泥分离和洗涤工作。本文,结合作者多年的生产实践经验,系统分析了影响100M~2赤泥过滤机产能的各种因素,提出提高底流固舍、降低溶液粘度、加强设备检修:提高系统的真空度以及抓好滤布的再生等措施,来提高100M~2赤泥过滤机的产能。 相似文献
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考虑低、特低渗透油藏裸眼压裂水平井流体从基质-裂缝-水平井筒及基质-水平井筒的耦合流动,以等值渗流阻力法及叠加原理为基础,将裸眼压裂水平井渗流区域划分为三个流动区域:流体在水平井压裂裂缝内的达西线性流动区域、水力压裂裂缝泄流引起的非达西椭圆渗流区域和流体在地层中的径向渗流区域.建立裸眼水平井水力压裂多条横向裂缝相互干扰的非达西产能预测模型,分析水力裂缝参数对产能影响,揭示裸眼压裂水平井开采变化规律.模拟结果表明:裂缝条数越多,裂缝干扰越强,水平井压裂存在一最优裂缝条数;裂缝沿水平井筒排布靠近两端、中间相对较稀,且两端长、中间短的开发效果最好. 相似文献
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塔河油田奥陶系油藏是经过多期构造运动和古岩溶共同作用形成的岩溶缝洞型碳酸盐岩油藏.利用成像测井资料及双侧向电阻率测片资料识别裂缝和溶洞,是目前测井资料综合解释应用的热点.当储层中存在缝和洞时,电阻率幅度应有不同程度的变化,根据这些变化,能有效的研究裂缝参数.对塔河油田A区B组裂缝性储层进行研究,分析了裂缝倾角、致密碳酸盐岩电阻率、泥浆电阻率、FMI成像测井资料处理参数与双侧向测井响应的关系. 相似文献
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通过对相关产业转移理论、国际投资理论和国内国外政策的研究,利用依靠云南省紧邻南亚东南亚国家相对具有的天然区位和资源优势,研究云南省在东南亚国家、特别是缅甸开展钢铁工业国际产能合作问题,务实地提出云南钢铁产业产能合作的建议和意见,具有一定的借鉴意义。 相似文献
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为了掌握页岩气藏生产动态特征,提高页岩气井产能,对页岩气藏渗流机理及产能评价进行研究.页岩气藏与常规气藏最主要的差异在于页岩气藏存在吸附解吸特性.利用Lang-muir等温吸附方程描述页岩气的吸附解吸现象,点源函数及质量守恒法,结合页岩气渗流特征建立双重介质压裂井渗流数学模型,通过数值反演及计算机编程绘制了产能递减曲线图版.分析了Langmuir体积、Langmuir压力、弹性储容比、窜流系数、边界、裂缝长度等因素对页岩气井产能的影响. 相似文献
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The management process of any construction operation usually can be defined as a chain of decisions. A decision-maker can bid, plan, and organize the bored pile projects based on an accurate estimate of productivity. To estimate productivity efficiently, piling process qualitative and quantitative factors have to be considered. This paper focuses on assessing the effect of subjective factors on bored pile construction productivity. A productivity index (PI) model is developed to represent this subjective effect in refining productivity assessment using simulation and deterministic techniques. The analytic hierarchy process and fuzzy logic are used to develop the proposed PI model that relies on the actual performance of 10 main piling process subjective factors. Subjective data were collected from bored pile (drilled shaft) contractors considering these subjective factors. The developed PI model implementation to piling process resulted in PI=0.7. This value has been validated using simulation model outputs. 相似文献
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心血管疾病死亡率始终居我国居民死因首位,且呈不断上升趋势,主要是由于心血管危险因素的流行。心血管疾病的发病是多种危险因素共同作用的结果,故其科学的整体危险评估和危险分层在心血管疾病一级预防非常重要。我国缺血性心血管病的的危险因素包括年龄、性别、血压、总胆固醇水平、超重与肥胖、糖尿病和吸烟。 相似文献
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由于碳酸盐岩储层存在严重的非均质性,常用的根据孔渗关系求取储层渗透率的方式得到的渗透率与实际相差较大,不适用于现实的生产。根据碳酸盐岩渗透率的大小主要受到孔隙结构的制约,而核磁共振(NMR)的T2分布情况、压汞的毛管压力曲线和储层孔隙结构关系密切的实情,给出了基于NMR与压汞资料的渗透率模型,该模型与经典的SDR模型和Timur-Coates模型相比精度较高。通过分析中东H油田M层组121块碳酸盐岩样品的NMR和压汞资料,可以看出Swanson参数、R35、R40与储层渗透率有较好的相关关系,同时在Swanson参数、R35、R40中Swanson参数与核磁共振T2LM之间的相关性最好。因此针对压汞资料较少的问题,给出了利用NMR的T2LM计算Swanson参数,从而获得储层渗透率的方法。将该方法应用于中东H油田M井,计算获得的渗透率大小与储层的岩心渗透率大小相近,证明该方法是可靠的。 相似文献
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Based on the theory of system energy-saving, a multilevel input-output computational model of the iron and steel enterprise was established. And one example was calculated using this model to analyze the product energy value, the process of energy consumption and energy consumption per ton of steel of an iron and steel enterprise. The influences of factory layout, steel ratio and production structure arc calculated and analyzed. The calculation example indicates that reasonable factory layout is helpful to reduce its transportation energy consumption, decrease loss of heat, improve product rate and reduce environmental contamination; ore to steel ratio and iron to steel ratio decrease at the same degree; the influence of ore to steel ratio on energy intensity per ton is less than that of iron to steel ratio. The lord process product structure has a certain effect on comprehensive energy consumption per ton of steel. 相似文献
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综合对比了5种目前常用的铜板带材综合成材率的计算方法,包括阶段成材组合法、产成品计算法、计算盘点法、单卷算术平均法、成品跟踪计算法。分析认为计算盘点法数据统计及计算简单,准确性高,受其他因素影响较小,可用于当月或更长时期的成材率计算;单卷算术平均法可用于周成材率计算,仅需要对每日成材率进行汇总,计算简单,且指导生产意义更大。阐述分析了卷重大小、断带、轧机头尾料、裂边切边、熔铸铣面及分切损失等因素对成材率的影响,指出了在实际生产中针对各影响因素需要重点关注的细节。分析总结了提高成材率的相关措施,以减少产品过程损耗,提高产品成材率。 相似文献
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Tarek M. Zayed 《Canadian Metallurgical Quarterly》2005,131(6):677-688
Continuous flight auger (CFA) piles do not receive sufficient research attention although they are widely used in the United States, United Kingdom, and other countries in the world. Therefore, this paper focuses on describing the CFA pile installation features, exploring its construction methods, and determining the factors that affect the CFA pile productivity and cost. A productivity index (PI) is developed to quantify the effect of subjective factors on the CFA process productivity. Current research concludes a PI value of 0.78 out of 1.0 (efficiency). Several models are designated to assess the CFA pile’s cycle time, productivity, and cost using deterministic approach. Various charts are developed to show this assessment based upon these models. Results show that the cycle time for 12.19?m depth and (0.36?m) (14?in) diameter piles is 16?min; however, its productivity is 24 piles (holes)/day. The developed tools play an essential role in the CFA decision making process. This paper is relevant to both researchers and practitioners. It provides charts for practitioners’ usage to schedule and price out the CFA pile construction projects. In addition, it provides the researchers with a methodology of applying the deterministic approach to the CFA pile construction process and its limitations. 相似文献
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采用有限元方法对热压缩物理模拟过程进行了模拟,分析了接触静摩擦系数、形变量、应变速率对热压缩方向应变及应变速率均匀性的影响,对不同取样位置及分析方向的形变均匀性进行了分析,并观察相对应的原奥氏体晶粒,进行验证。结果表明,试样热压缩方向的应变及应变速率由心部向端部逐步减小,距试样中心1/4位置处最接近设定的应变及应变速率;接触静摩擦系数对试样热压缩方向形变不均匀性影响显著,形变量、应变速率对形变不均匀性的影响较小;推荐自热压方向1/4位置处取样,该处应变及应变速率基本符合设定条件,且形变均匀性最好。 相似文献