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致密气田产能分区定量评价研究
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作者 段宝江 《承德石油高等专科学校学报》 CAS 2024年第4期22-25,31,共5页
致密气具有低压、低渗、非均质性强等特点,开发难度大,为经济有效地开发,往往采用先肥后瘦、滚动开发的策略开发,因此对致密气田进行产能分区十分必要。目前致密气田产能有利分区常用的方法是地质多因素定性分析和储能系数法。地质多因... 致密气具有低压、低渗、非均质性强等特点,开发难度大,为经济有效地开发,往往采用先肥后瘦、滚动开发的策略开发,因此对致密气田进行产能分区十分必要。目前致密气田产能有利分区常用的方法是地质多因素定性分析和储能系数法。地质多因素分析法主观性强,只能做到定性分析;储能系数法虽然可以做到定量分析,但忽略了致密气储层渗透率的作用,仅能体现储层气的富集程度,无法真实反映产能。将储层渗透率纳入考虑,提出产能综合系数QI(Kh?S_g)的概念,建立产能综合系数与气井无阻流量的关系,以经济极限无阻为界限,提出产能评价标准,对致密气田进行产能分区,找出区块真正意义的可动用甜点,为气田井位部署提供有利指导。 展开更多
关键词 致密气 产能综合系数 产能分区 定量评价
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复杂渗流条件下致密气藏压裂气井分区产能计算方法 被引量:3
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作者 丁景辰 《科学技术与工程》 北大核心 2021年第3期991-995,共5页
致密气藏压裂气井渗流机理复杂,压裂改造区内外渗流机理和影响因素也截然不同,常规的产能计算模型不能准确描述这种存在区域差异的渗流特征,造成最终产能计算误差较大。以气体渗流理论为基础,分析了在致密气藏压裂气井分区域渗流机理,... 致密气藏压裂气井渗流机理复杂,压裂改造区内外渗流机理和影响因素也截然不同,常规的产能计算模型不能准确描述这种存在区域差异的渗流特征,造成最终产能计算误差较大。以气体渗流理论为基础,分析了在致密气藏压裂气井分区域渗流机理,明确了压裂气井不同区域的渗流特征及影响因素。在此基础上建立了复杂渗流条件下的致密气藏压裂气井分区产能计算方法并开展了实例验证。计算结果表明,分区产能计算模型计算产能更加接近气井实际,较现有模型更加准确可靠。 展开更多
关键词 产能计算 分区产能 致密气藏 压裂气井
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Artemia cyst production in Russia
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作者 Liudmila I.LITVINENKO Aleksandr I.LITVINENKO +1 位作者 Elena G.BOIKO Kirill KUTSANOV 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2015年第6期1436-1450,共15页
In Western Siberia(Russia) there are about 100 Artemia lakes with total area over 1 600 km 2.Geographically these lakes are located between 51°–56°N and 61°–82°E.In general these lakes are shallo... In Western Siberia(Russia) there are about 100 Artemia lakes with total area over 1 600 km 2.Geographically these lakes are located between 51°–56°N and 61°–82°E.In general these lakes are shallow(depth less than 1.5 m),small or medium size(0.1 to 10 km 2);they are chloride;their total salinity is from 40 to 250 g/L.The harvesting of cysts per year is only in 20–40 lakes.In Russia 550 tons of dry Artemia cysts(14%–18% of the world production) were harvested annually.This includes about 350 tons in the Altai region and 200 tons in other regions.During our regular 20-year study period the cyst harvest was:95 tons in Kurgan;65 tons in Omsk,20 tons in Novosibirsk,20 tons in Tyumen.Ways of increasing cyst harvest in Russia are considered in this article.During the last 30 years the harvest of cysts in Russia has increased from 7–20 to 500–600 tons.A significant influence of dryness of the year was found on productivity in selected lakes,but taken for all the lakes together,the relationship was not significant.The optimal salinity for productivity of cysts in the lakes was determined.Analysis of productivity of the lakes and the harvesting results showed that the stocks of cysts are underutilized by approximately 1.7 times. 展开更多
关键词 ARTEMIA brine shrimp cyst production Russian saline lakes population dynamics aquacultureindustry
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Regional Distribution and Pollution of Energy-lntensive Industries in China
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作者 龚健健 沈可挺 《China Economist》 2011年第5期93-103,共11页
This paper investigates the regional distribution and pollution of energyintensive industries in China. Through the analysis of provincial panel data collected during 1998-2008, this work estimates the drivers of poll... This paper investigates the regional distribution and pollution of energyintensive industries in China. Through the analysis of provincial panel data collected during 1998-2008, this work estimates the drivers of pollution in 30 of China's provincial-level divisions. The paper concludes that while China's energy-intensive industries are heavily distributed in eastern and central China, the speed of development toward central and western China has, in recent years, risen continuously. Industries located in eastern China do, however, remain the primary polluters in the country. Notably, regional agglomeration of energy-intensive industries plays a positive role in energy conservation and pollution control in China. This paper also finds that patterns of pollution in China follow the environmental Kuznets curve (EKC) with strong inter-provincial discrepancies. 展开更多
关键词 energy-intensive industry POLLUTION regional distribution industrial meration environmental Kuznets curve (EKC)
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Proficiency Testing in Analysis of Wine Products
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作者 Jarmila Lastincova Eubica Pospisilova Ernest Beinrohr 《Journal of Chemistry and Chemical Engineering》 2013年第8期774-778,共5页
The quality variety wines which are produced in specified regions of Slovakia are mostly watched category of wine in European Union. Quality of the measurement for appropriate parameter in wine sample is given by unce... The quality variety wines which are produced in specified regions of Slovakia are mostly watched category of wine in European Union. Quality of the measurement for appropriate parameter in wine sample is given by uncertainty. Therefore, protocol of analysis has to have an uncertainty of measurement and should be made in accredited laboratory. In Slovakia, there are six wine growing regions (Tokaj, east Slovakia region, south Slovakia region, middle Slovakia region, Nitriansky region and Little-Carpathian region) where the quality wines with protected designation of origin are produced. Central Controlling and Testing Institute in Agriculture in Bratislava is a state organization, which has an accredited laboratory for testing wine products before introduction into the market. This article presents the results of the authors' measurements in proficiency testing FAPAS (food analysis performance assessment scheme) which were organized by Central Science Laboratory in York (England) in 2011. The authors add also interlaboratory comparison in 2012 between Slovak accredited laboratories. The results show very good agreement. Quality control in the wine sector presents very important feature in the market, therefore, using certified reference materials and checking the accredited laboratories with interlaboratory comparisons is very helpful. Testing of wine in the authors' laboratory is performed by EN ISO/IEC: 17025. The results show that z-score lies not outside the range ±2 and this is a chance that the authors' results are actually acceptable. 展开更多
关键词 Wine analysis COMPARISON proficiency tests.
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