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Factors controlling the development of carbonate reservoirs of Ordovician Yingshan formation in the Gucheng area, Tarim Basin

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Energy Geoscience 2023年第3期4卷 18-25页

作者： juan He Exploration&Production Research Institute SINOPECBeijing102206China

deep carbonate rocks are important targets for oil and gas exploration in China. In recent years, significant oil/gas discoveries have been made in the deep carbonate sequences in the Tarim, Sichuan, Ordos, and Bohai Bay basins. despite significant oil/gas discoveries, large-scale exploration has not been conducted in the Gucheng area in the Tarim Basin. To break the bottleneck restricting the petroleum exploration in the Gucheng area, this study analyzed the factors controlling the formation of carbonate reservoirs of the Yingshan Formation in the Gucheng area in detail based on the basic geological conditions of the study area and the data from cores, thin sections, well logging, testing, and 3-d seismic survey. The inner shallow-ramp in the Gucheng area acts as the main sedimentary facies zone for the development of high-quality reservoirs. The grainstones formed in the high-energy environment of the inner shallow-ramp laid the foundation for subsequent reservoir development in the study area. The dolomitized shoal grainstones in the inner shallow-ramp have well-developed intercrystalline pores and intercrystalline dissolved pores due to later dolomitization, thus serving as high-quality reservoirs. Strike-slip faults are crucial to reservoir reformation and determine whether high production can be achieved in oil and gas exploitation in the study area. Moreover, later reformation by hydrothermal solutions also plays a constructive role in reservoir formation.

关键词： Inner shallow ramp dolonitized shoal Strike-slip fault Hydrothermal process Yingshan Formation Tarim Basin

Binding Capacity for Aflatoxin B_1 by different Adsorbents

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Agricultural Sciences in China 2010年第3期9卷 449-456页

作者： LI juan-juan SUO de-cheng SU Xiao-ou Institute of Quality Standard and Testing Technology for Agro-Product Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

In this article, in vitro adsorption of aflatoxin B1 （AFB1） onto different adsorbents was characterized and the result was verified by comparing the growth performance and serum protein levels of broilers exposed to aflatoxin-contamination feed. Main components of adsorbents selected were yeast cell extracts （Product A）, HSCAS （Product B）, and a mixture of yeast product and HSCAS （Product C）, respectively. A total of 240 broilers were assigned to eight treatments, and the effects of three types of adsorbents on growth performance and serum protein levels were evaluated. Results indicated that Product B had the highest in vitro affinity for AFB1, followed by Product C and Product A. Product B bound 97.69% of the AFB1 in solution in 10 min, and it remained over 96.03% in 60 min at pH 8.0. The B-AFB1 complex was much stronger than the other two complexes in vitro condition （P 〈 0.05）. Feed intake （FI） and average daily gain （AdG） decreased （P 〈 0.05） and feed gain ratio increased （P 〈0.05） in the treatment fed aflatoxin-contaminated feed versus treatment on the basal feed. Serum total protein （TP）, albumin （ALB）, and globulin （GLOB） levels were significantly decreased （P〈0.05）. Product B （0.15%） increased growth performance and improved serum protein levels, Product A and Product C were not as effective as Product B. Three adsorbents tested here had sufficient potential to AFBt in some extents and Product B could bind AFB1 more effectively than Product A and Product C. These results indicated that Product B could alleviate some of the AFBt toxic effect in broilers.

关键词： adsorbent AFB 1 absorption efficacy

Relation among C-curve characterization diagrams

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第10期8卷 1663-1670页

作者： CAO juan WANG Guo-zhao Institute of Computer Graphics and Image Processing Department of Mathematics Zhejiang University Hangzhou 310027 China

As three control points are fixed and the fourth control point varies, the planar cubic C-curve may take on a loop, a cusp, or zero to two inflection points, depending on the position of the moving point. The plane can, therefore, be partitioned into regions labelled according to the characterization of the curve when the fourth point is in each region. This partitioned plane is called a "characterization diagram". By moving one of the control points but fixing the rest, one can induce different characterization diagrams. In this paper, we investigate the relation among all different characterization diagrams of cubic C-curves based on the singularity conditions proposed by Yang and Wang (2004). We conclude that, no matter what the C-curve type is or which control point varies, the characterization diagrams can be obtained by cutting a common 3d characterization space with a corresponding plane.

关键词： Spline C-curve Characterization diagram Singularity

MECHANISM FOR VISCOELASTIC POLYMER SOLUTION PERCOLATING THROUGH POROUS MEdIA

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Journal of Hydrodynamics 2007年第2期19卷 241-248页

作者： ZHANG Li-juan YUE Xiang-an Ministry of Education Key Laboratory of Petroleum Engineering China University of Petroleum Beijing 102249 China

The pore throat of porous media is modeled as a constricted channel or expanded channel. The flow of viscoelastic polymer solution in pore throat model is studied by numerical method. Relationship between pressure drop and flow rate is developed, viscoelasticity and throat size are found to be two main factors in high flow resistance. According to pore throat model, 2-d stochastic channel bundle is put forward to model porous media, which is composed of pore throat models in series - parallel connection with size and length accord to Hating Greenkorn stochastic distribution. Percolation model of viscoelastic fluid is developed on the basis of darcy equation and pressure drop vs. flow rate relation in 2-d stochastic channel bundle. Results indicate that the seepage ability of viscoelastic polymer solution decreases with the increase of viscoelasticity, injection rate, and heterogeneity as well as the decrease of mean pore size of porous media. The high pressure drop of viscoelastic fluid at the connection of pore to throat plays a great role in its anomalous high flow resistance through porous media.

关键词： polymer flooding viscoelastic fluid,flow resistance percolation pore throat

Visualizing nanopore blinkings in parallel:a high-throughput nanopore array potential for ultra-rapid dNA sequencing

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Science Bulletin 2015年第23期60卷 2067-2068页

作者： Jing-juan Xu State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences School of Chemistry and Chemical EngineeringNanjing University

Upon finishing the sequencing of the first complete human genome in 2004[1],the demand for fast dNA reading with less than$1,000 has been fueled by the ever-increasing awareness for personalized medicine and clinical diagnosis[2,3].Plenty of sequencing techniques,from the original Sanger sequencing method to novel sequencing-by-synthesis technologies(Roche,Solexa,SOLi d,etc.)[3],have been developed rapidly in past decades,which are sug-

关键词： dNA测序纳米孔阵列高通量可视化超快速人类基因组测序平行临床诊断

Precise drag prediction of airfoil flows by a new algebraic model

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Acta Mechanica Sinica 2020年第1期36卷 35-43页

作者： Meng-juan Xiao Zhen-Su She State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking UniversityBeijing100871China

We report the results of accurate prediction of lift(C L)and drag(C d)coefficients of two typical airfoil flows(NACA0012 and RAE2822)by a new algebraic turbulence model,in which the eddy viscosity is specified by a stress length(SL)function predicted by structural ensemble dynamics(SEd)*** accuracy of the prediction of C d with error of a few counts(one count is 10−4)and of C L with error under 1%-2%are uniformly obtained for varying angles of attack(AoA),indicating an order of magnitude improvement of drag prediction accuracy compared to currently used models(typically around 20 to 30 counts).More interestingly,the SEd-SL model is distinguished with fewer parameters of clear physical meaning,which quantify underlying turbulent boundary layer(TBL)with a universal multi-layer structure,and is thus promising to be more easily generalizable to complex *** use of the new model for the calibration of flow condition in experiment and the extraction of flow physics from numerical simulation data of aeronautic flows are discussed.

关键词： Lift and drag coefficients Airfoil Flows Stress Length Structural ensemble dynamics

Need for infliximab dose intensification in Crohn's disease and ulcerative colitis

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World Journal of Gastroenterology 2014年第27期20卷 9170-9177页

作者： Carlos Taxonera david Olivares juan L Mendoza Manuel díaz-Rubio Enrique Rey Inflammatory Bowel disease Unit Department of Gastroenterology Hospital Clínico San Carlos Instituto de Investigación del Hospital Clínico San Carlos (IdISSC) department of Gastroenterology Hospital Clínico San Carlos

AIM: To compare the need for infliximab dose intensification in two cohorts of patients with Crohn’s disease (Cd) or ulcerative colitis (UC).

关键词： Crohn's disease Ulcerative colitis Infliximab dose intensification Costs

Numerical study on indoor environment and thermal comfort in train station waiting hall with two different air-conditioning modes

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Building Simulation 2021年第2期14卷 337-349页

作者： Biyao Zhuang juan Shi Zhenqian Chen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education of China School of Energy and EnvironmentSoutheast UniversityNanjing210096China

With the increasing size of the waiting hall,the large-area use of transparent envelope materials makes the interior surface temperature of the envelope too high,which puts forward higher requirements for the control of environment and thermal comfort *** this paper,the characteristics of indoor temperature distribution,relative humidity distribution and thermal comfort under the all air system(AAs)and the radiant floor cooling and wall cooling combined with air supply system(RC/ASs)were investigated in the large *** computational fluid dynamics(CFd)method was used,and the performance of the CFd model was validated by comparing the measured results with CFd simulation results in the *** numerical results clearly showed that the temperature and relative humidity indoors could satisfy the design requirement both in the AAs and RC/*** indoor air distribution in most areas under the RC/ASs was more uniform based on the indoor heat and humidity requirements under the cooling load of measured *** the AAs,the total cooling capacity of air conditioning unit was the highest when indoor thermal comfort was the best,that meant that to achieve the best working condition,the air-conditioning system need high energy ***,the RC/ASs addressed the problem that the temperature around the seated passengers in the waiting area was relatively high in the *** paper will provide reference for the air conditioning system design in the similar large spaces in the future.

关键词： radiant floor cooling radiant wall cooling large spaces thermal comfort

Effects of Variable Jet Nozzle Angles on Cross-Flow Suppression and Heat Transfer Enhancement of Swirl Chamber

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Journal of Thermal Science 2022年第1期31卷 214-223页

作者： XIAO Kun HE juan FENG Zhenping Institute of Turbomachinery School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China

This paper investigated the effects of variable jetting nozzle angles on the cross-flow suppression and heat transfer enhancement of swirl cooling in gas turbine leading edge. The swirl chamber with vertical jet nozzles was set as the baseline, and its flow fields and heat transfer characteristics were analyzed by 3d steady state Reynolds-averaged numerical methods to reveal the mechanism of cross-flow weakening the downstream jets and heat transfer. On this basis, the flow structure on different cross sections and heat transfer characteristics of swirl chamber with variable jetting nozzle angels were compared with the baseline swirl chamber. The results indicated that for the baseline swirl chamber the circumferential velocity gradually decreased and the axial velocity gradually increased, and the cross-flow gradually formed. The cross-flow deflected the downstream jets and drawn them to the center of the chamber, thus weakening the heat transfer. For swirl chamber with variable jetting nozzle angles, the air axial velocity is axial upstream, opposite to the mainstream, so that the impact effects of cross-flow on the jets were reduced, and the heat transfer was enhanced. Furthermore, with the increase of axial velocity along the swirl chamber, the jetting nozzle angle also gradually increased, as well as the effect of cross-flow suppression, which formed a relative balance. For all swirl chambers with variable jet nozzle angles, the thermal performance factors were all larger than 1, which indicated the heat transfer was enhanced with less friction increment.

关键词： swirl cooling cross-flow heat transfer enhancement variable jet nozzle angle