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A novel method of quantitative evaluation and comprehensive classification of low permeability-tight oil reservoirs: A case study of Jidong Oilfield, China

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Petroleum Science 2022年第4期19卷 1527-1541页

作者： Dong-Liang Jiang Hao Chen Jian-Peng Xing Lin Shang Qun-Hui Wang Yan-Chun Sun Yao Zhao Jian Cui Ian duncan State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China Key Lab of Petroleum Eng.of MOE China University of Petroleum(Beijing)Beijing102249China Postdoctoral Station of PetroChina Jidong Oilfield Company TangshanHebei 063000China Postdoctoral Program of PetroChina Research Institute of Petroleum Exploration and Development Beijing100083China Exploration and Development Research Institute PetroChina Jidong Oilfield CompanyTangshanHebei063000China Bureau of Economic Geology The University of Texas at Austin78705United States

The classification of low permeability-tight reservoirs is the premise of development. The deep reservoir of Shahejie 3 member contains rich low permeability-tight reserves, but the strong heterogeneity and complex micro pore structure make the main controlling factors subjective and the classification boundaries unclear. Therefore, a new indicator considering the interaction between fluid and rock named Threshold Flow Zone Indicator(TFZI) is proposed, it can be used as the main sequence of correlation analysis to screen the main controlling factors, and the clustering algorithm is optimized combined with probability distribution to determine the classification boundaries. The sorting coefficient, main throat radius, movable fluid saturation and displacement pressure are screened as the representative parameters for the following four key aspects: rock composition, microstructure, flow capacity and the interaction between rock and fluid. Compared with the traditional probability distribution and clustering algorithm, the boundary of the optimized clustering algorithm proposed in this paper is more *** classification results are consistent with sedimentary facies, oil levels and oil production *** method provides an important basis for the development of low permeability-tight reservoirs.

关键词： Low permeability-tight reservoir Classification boundary Correlation analysis Probability distribution Clustering algorithm

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JAMIE OLIVER

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海外英语 2011年第1期 42-43页

作者： duncan McQueen

他因帮助英国学校改变饮食习惯而被人们熟知。他甚至对政府部门也产生了影响。如今，他正在努力改变世界。他就是擅长使用有机食材的餐饮界明星——杰米·奥利弗。

关键词：英语课外阅读翻译方法阅读材料

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“Sister Friend”

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China Today 1995年第6期44卷 30-31页

作者： $$$$CHARLENE duncan

“ＳｉｓｔｅｒＦｒｉｅｎｄ”ＴＨＥＥＶＥＮＩＮＧｏｆＦｒｉｄａｙ，Ａｕｇｕｓｔ１９，１９９４，ｗａｓｎｏｔａＴｙｐｉｃａｌｅｖｅｎｉｎｇｆｏｒｍｅ．Ｉｈａｄｔｏｒｕｓｈｈｏｍｅｆｒｏｍｗｏｒｋ，ｐａｃｋｍｙｓｕｉｔｃ...

“ＳｉｓｔｅｒＦｒｉｅｎｄ”ＴＨＥＥＶＥＮＩＮＧｏｆＦｒｉｄａｙ，Ａｕｇｕｓｔ１９，１９９４，ｗａｓｎｏｔａＴｙｐｉｃａｌｅｖｅｎｉｎｇｆｏｒｍｅ．Ｉｈａｄｔｏｒｕｓｈｈｏｍｅｆｒｏｍｗｏｒｋ，ｐａｃｋｍｙｓｕｉｔｃａｓｅａｎｄｈｕｒｒｙｏｕｔｔｏＣ...

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Human African trypanosomiasis in endemic focus of Abraka,Nigeria

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Asian Pacific Journal of Tropical Medicine 2010年第6期3卷 448-450页

作者： Onyebiguwa Patrick Goddey Nmorsi Clement Isaac Igho Benjamin Igbinosa duncan Ogheneocovo Umukoro Dafe Palmer Aitaikuru Tropical Disease Research Unit Department of ZoologyAmbrose Alli UniversityEkpomaNigeria Family Medicine Department Delta State UniversityAbraka Department of Science Laboratory Technology Delta State PolytechnicOtefeOghara

Objective:To investigated the prevalence of human African trypanosomiasis(HAT),a neglected tropical disease caused by Trypanosoma brucei gambiens in an endemic focus of Nigeria,as it relates to age,sex and occupational ***:A total of 474 human subjects were screened using card agglutination test for trypanosomiasis *** samples were further investigated for parasite positivity in blood/serum and cerebrospinal fluid(CSF).Results:Of the 474 screened,44(9.3%) were seropositive with seroprevalence of 22(9.6%) in Urhouka,14(9.5%) in Umeghe and 8(7.9%) for *** number of seropositives,observed for weakly,moderately and strongly positives for the three communities were 4,7 and 11 in Urhouka,4,5 and 5 in Umeghe and 3,2 and 3 in Ugonu *** the 16 volunteers with detected parasite in their blood,4 of them were weakly positive,5 of them were moderately positive and 7 of them strongly positive.4 volunteers from Urhouka community were found parasites in their CSF and they were all strongly *** difference between the seroprevalence of males and females was not statistically significant(OR=1.14,95%CI=0.37-3.4,P>0.05).The prevalence difference between age group 21-30 years old and the youngest and oldest age groups was statistically significant(OR=3.5,95%CI= 1.08-12.57,P0.05),It was observed that farmers had significantly higher prevalence of HAT infection as well as greater risk of Trypanosoma brucei gambiense infection than inhabitants with other occupations (OR=3.25,95%CI=0.99-11.79,P<0.05).Conclusions:Human activities such as farming and visits to the river have been identified as major risk factors to *** the breakdown of HAT control program has been advanced for the rise in HAT in Abraka,an endemic focus in Nigeria.

关键词： Human African trypanosomiasis Trypanosoma brucei gambiense Seropositivity Risk factors Nigeria

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Carbon Emissions Embodied in China’s International Trade of Textiles and Clothing

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Journal of Donghua University(English Edition) 2012年第6期29卷 515-519页

作者：王来力丁雪梅孙菲菲 NDWIGA duncan-Kariuki 吴雄英 Fashion Institute Donghua University School of Art and Design South-Central University for Nationalities International Cultural Exchange School Donghua University Shanghai Entry-Exit Inspection and Quarantine Bureau

International trade of textiles and clothing has numerous environmental implications, such as carbon leakage. In order to estimate the CO2 emissions embodied in China's imports and exports of textiles and clothing, an empirical analysis was carried out with environmental input-output analysis (EIOA) method using the most recent data available. The results indicate that China is a net exporter of embodied CO2 emissions on account of its international trade of textiles and clothing. The amount of the net exported embodied CO2 emissions increases from 110 million metric tons(Mt) of CO2 in 2002 to 280 Mt of CO2 in 2011. In particular, United States, Japan, and European Union transfer to China 339 Mt of CO2, 291 Mt of CO2 and 396 Mt of CO2 respectively during the period of 2002 -2011.

关键词： embodied CO2 emissions international trade textiles and clothing

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Like a Boss!How to speak like the big Chinese cheese in the office

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The World of Chinese 2013年第3期 76-78,4页

作者： duncan POUPARD

Being in charge in Mandarin is a little trickier than you might think; this guide will put you on the path to speaking Chinese like a big wig

关键词： than

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Towards the optimization of management of hepatocellular carcinoma

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Frontiers of Medicine 2011年第3期5卷 271-276页

作者： Xi Feng Madhava Pai Malkhaz Mizandari Tinatin Chikovani duncan Spalding Long Jiao Nagy Habib Division of Surgery Department of Surgery and CancerImperial College LondonLondon W120NNUK Tbilisi 1st Hospital University Clinic High Technology Medical CenterTbilisi 0144Georgia

Hepatocellular carcinoma(HCC)is the fifth most common neoplasm in the world,closely correlated with viral hepatitis and liver *** vast majority of HCC patients present at a late stage and are unsuitable for surgery due to limited liver functional *** can involve major vessels or hilar structures,necessitating major liver resection and/or rendering liver resection unfeasible.A series of new technologies have been developed to optimise HCC *** cell therapy improves impaired liver functional reserve prior to liver *** radiofrequency ablation recanalises the portal vein invaded by tumour thrombus and endobiliary radiofrequency ablation restores and extends biliary patency of the bile duct invaded by *** radiofrequency assisted liver resection minimizes blood loss and avoids liver warm ischemia,while increasing parenchymal *** benefits combined maximize the safety of liver resection.

关键词： management hepatocellular carcinoma(HCC) radiofrequency(RF)ablation laparoscopic liver resection stem cell intravascular RF ablation endobiliary RF ablation

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Mobile Phones

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英语世界 2017年第10期 127-128页

作者： Craig duncan

When Scotsman Alexander Graham Bell invented the telephone in 1876,it was a revolution in com *** the first time,people could talk to each other over great distances almost as clearly as i they were in the same ***,though,we increasingly use Bell’s invention for taking photo graphs,accessing the internet,or watching video clips,rather than *** the last two decades a new means of spoken communication has emerged:the mobile phone.

关键词： Mobile Phones

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Comparative Evaluation of the Performance of SWAT, SWAT+, and APEX Models in Simulating Edge of Field Hydrological Processes

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Open Journal of Modelling and Simulation 2023年第2期11卷 37-49页

作者： duncan Kikoyo Tobias Oker Texas Water Resources Institute Texas A & M University College Station USA UC Cooperative Extension University of California Bakersfield USA

Hydrologic and water quality models are often used in assessing the response of environmental processes to human activities and climatic change. However, these models differ in terms of their complexity, requirements, underlying equations, and assumptions, and as such their performance in simulating landscape processes varies. Consequently, a key question that has to be addressed is to select the most suitable model that gives results closest to reality for an intended purpose. In this study, the performance of the basin-wide older version of SWAT is compared with that of the small watershed model APEX to assess the performance of both models at a field scale level. The new restructured version of SWAT (SWAT+) is compared with the older version to determine whether the new changes incorporated in SWAT+ have improved model performance, particularly for small watersheds. The three models were used to simulate the edge of field processes for a 6.6 ha plot located at the USDA-Agricultural Research Station near Riesel, Texas, and to predict water yield, soil, and mineral phosphorous loss from the micro watershed. Results showed that all the uncalibrated models over-predict soil and phosphorous loss in a micro watershed. Uncalibrated SWAT and SWAT+ models simulated water yield satisfactory albeit with low-performance metrics. The calibrated versions simulated water yield with indices close to optimal values. PBIAS as a performance assessment metric was determined to be overly sensitive and prone to numerical errors. SWAT+ will be helpful in the understanding of hydrological and water quality processes at micro watersheds considering that it addresses structural flaws associated with the older version, and the manually calibrated version matches the performance of both APEX and SWAT, despite the latter two undergoing rigorous automatic calibration.

关键词： Erosion Modelling Phosphorous Loss Riesel Water Yield

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Incident flow effects on the performance of piezoelectric energy harvesters from galloping vibrations

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Theoretical & Applied Mechanics Letters 2014年第2期4卷 91-96页

作者： Abdessattar Abdelkefi Armanj Hasanyan Jacob Montgomery duncan Hall Muhammad R.Hajj Department of Engineering Science and Mechanics Virginia Tech

In this paper, we investigate experimentally the concept of energy har- vesting from galloping oscillations with a focus on wake and turbulence effects. The .harvester is composed of a unimorph piezoelectric cantilever beam with a square cross-section tip mass. In one case, the harvester is placed in the wake of another galloping harvester with the objective of determining the wake effects on the response of the harvester. In the second case, meshes were placed upstream of the harvester with the objective of investigating the effects of upstream turbulence on the response of the harvester. The results show that both wake effects and up- stream turbulence significantly affect the response of the harvester. Depending on the spacing between the two squares and the opening size of the mesh, wake and upstream turbulence can positively enhance the level of the harvested power.

关键词： energy harvesting galloping oscillations incident flow effects experimentalmeasurements

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