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3D Property Modeling of Void Ratio by Cokriging 被引量:2
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作者 姚凌青 潘懋 成秋明 《Journal of China University of Geosciences》 SCIE CSCD 2008年第4期410-415,共6页
Void ratio measures compactness of ground soil in geotechnical engineering. When samples are collected in certain area for mapping void ratios, other relevant types of properties such as water content may be also anal... Void ratio measures compactness of ground soil in geotechnical engineering. When samples are collected in certain area for mapping void ratios, other relevant types of properties such as water content may be also analyzed. To map the spatial distribution of void ratio in the area based on these types of point, observation data interpolation is often needed. Owing to the variance of sampling density along the horizontal and vertical directions, special consideration is required to handle anisotropy of estimator. 3D property modeling aims at predicting the overall distribution of property values from limited samples, and geostatistical method can be employed naturally here because they help to minimize the mean square error of estimation. To construct 3D property model of void ratio, cokriging was used considering its mutual correlation with water content, which is another important soil parameter. Moreover, K-D tree was adopted to organize the samples to accelerate neighbor query in 3D space during the above modeling process. At last, spatial configuration of void ratio distribution in an engineering body was modeled through 3D visualization, which provides important information for civil engineering purpose. 展开更多
关键词 property modeling COKRIGING VARIOGRAM ANISOTROPY K-D tree
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Application of 3-D Geoscience Modeling Technology for the Estimation of Solid Mineral Reserves 被引量:15
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作者 PAN Mao LI Jun +1 位作者 WANG Zhangang JIN Jiangjun 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2009年第3期655-660,共6页
Applying new approaches, methods, and technologies for the estimation of reserves can effectively improve the efficiency and accuracy of assessments of solid mineral resources. After analyzing the development of 3-D g... Applying new approaches, methods, and technologies for the estimation of reserves can effectively improve the efficiency and accuracy of assessments of solid mineral resources. After analyzing the development of 3-D geoscience modeling technology (3-D GMT), this paper discusses the application of 3-D GMT for the estimation of solid mineral reserves, emphatically introducing its workflow and two key technologies, 3-D orebody surface modeling, and property modeling. Moreover, the paper analyzes the limitations of traditional methods, such as the section method and geological block method, and points out the advantages of 3-D GMT: building more accurate 3-D orebody models, expressing the internal inhomogeneous attributes of an orebody, reducing the potential for errors in the estimation of reserves, and implementing dynamic estimations of reserves. 展开更多
关键词 3-D geoscience modeling solid mineral resource estimation of reserves surface modeling property modeling
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A novel method of rapidly modeling optical properties of actual photonic crystal fibres 被引量:2
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作者 王立文 娄淑琴 +1 位作者 陈卫国 李宏雷 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第8期1-7,共7页
The flexible structure of photonic crystal fibre not only offers novel optical properties but also brings some difficulties in keeping the fibre structure in the fabrication process which inevitably cause the optical ... The flexible structure of photonic crystal fibre not only offers novel optical properties but also brings some difficulties in keeping the fibre structure in the fabrication process which inevitably cause the optical properties of the resulting fibre to deviate from the designed properties. Therefore, a method of evaluating the optical properties of the actual fibre is necessary for the purpose of application. Up to now, the methods employed to measure the properties of the actual photonic crystal fibre often require long fibre samples or complex expensive equipments. To our knowledge, there are few studies of modeling an actual photonic crystal fibre and evaluating its properties rapidly. In this paper, a novel method, based on the combination model of digital image processing and the finite element method, is proposed to rapidly model the optical properties of the actual photonic crystal fibre. Two kinds of photonic crystal fibres made by Crystal Fiber A/S are modeled. It is confirmed from numerical results that the proposed method is simple, rapid and accurate for evaluating the optical properties of the actual photonic crystal fibre without requiring complex equipment. 展开更多
关键词 photonic crystal fibre digital image processing finite element method modeling optical properties
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Microstructure observation and mechanical behavior modeling for limnetic nacre 被引量:9
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作者 Shuchun Zuo Yueguang Wei 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2008年第1期83-89,共7页
In the present research, microstructure of akind of limnetic shell (Hyriopsis cumingii) is observed and measured by using the scanning electron microscopy, and mechanical behavior experiments of the shell nacre are ... In the present research, microstructure of akind of limnetic shell (Hyriopsis cumingii) is observed and measured by using the scanning electron microscopy, and mechanical behavior experiments of the shell nacre are carried out by using bending and tensile tests. The dependence of mechanical properties of the shell nacre on its microstructure is analyzed by using a modified shear-lag model, and the overall stress-strain relation is obtained. The experimental results reveal that the mechanical properties of shell nacre strongly depend on the water contents of the limnetic shell. Dry nacre shows a brittle behavior, whereas wetting nacre displays a strong ductility. Compared to the tensile test, the bending test overestimates the strength and underestimates the Young's modulus. The modified shear-lag model can characterize the deformation features of nacre effectively. 展开更多
关键词 Nacre. Microstructure Shear-lag model .Mechanical property
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Modeling oxidation damage of continuous fiber reinforced ceramic matrix composites 被引量:4
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作者 Cheng-Peng Yang Gui-Qiong Jiao Bo Wang 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2011年第3期382-388,共7页
For fiber reinforced ceramic matrix composites(CMCs),oxidation of the constituents is a very important damage type for high temperature applications. During the oxidizing process,the pyrolytic carbon interphase grad... For fiber reinforced ceramic matrix composites(CMCs),oxidation of the constituents is a very important damage type for high temperature applications. During the oxidizing process,the pyrolytic carbon interphase gradually recesses from the crack site in the axial direction of the fiber into the interior of the material. Carbon fiber usually presents notch-like or local neck-shrink oxidation phenomenon,causing strength degradation. But,the reason for SiC fiber degradation is the aw growth mechanism on its surface. A micromechanical model based on the above mechanisms was established to simulate the mechanical properties of CMCs after high temperature oxidation. The statistic and shearlag theory were applied and the calculation expressions for retained tensile modulus and strength were deduced,respectively. Meanwhile,the interphase recession and fiber strength degradation were considered. And then,the model was validated by application to a C/SiC composite. 展开更多
关键词 CMCs- Oxidation- Interface- Mechanical properties - Micromechanical model
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Shear creep characteristics and constitutive model of limestone 被引量:9
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作者 Yu Mei Mao Xianbiao Hu Xinyu 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第3期423-428,共6页
The characters of limestone in weak interlayer of a high rocky slope in Xuzhou, China, are studied by shear static test and shear creep test. The results show that limestone specimens have attenuation creep properties... The characters of limestone in weak interlayer of a high rocky slope in Xuzhou, China, are studied by shear static test and shear creep test. The results show that limestone specimens have attenuation creep properties and constant rate creep properties, almost have no accelerated creep properties. The exponential type empirical formula is selected to fit creep grading curves by polynomial regression analysis method, and the square sums of the fitting results residual are in the order of 10^(-7). Then grade creep curves at every shear loads are set up. Combining creep rate-time curve, the creep properties of limestone are analyzed. As the physical meaning of component model is clearer, the Poytin–Thomson model is set up. Through the least square method, the optimal parameters of Poytin–Thomson model are obtained,and the sums of squared residuals belong to 10^(-3)order of magnitude, which can meet the accuracy requirements of engineering calculation. So the Poytin–Thomson model can reflect the shear creep characteristics of limestone very well. 展开更多
关键词 Limestone Shear creep property Empirical formula Poytin–Thomson model
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Constitutive Model of Friction Stir Weld with Consideration of its Inhomogeneous Mechanical Properties 被引量:3
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作者 ZHANG Ling MIN Junying +3 位作者 WANG Bin LIN Jianping LI Fangfang LIU Jing 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第2期357-364,共8页
In practical engineering, finite element(FE) modeling for weld seam is commonly simplified by neglecting its inhomogeneous mechanical properties. This will cause a significant loss in accuracy of FE forming analysis... In practical engineering, finite element(FE) modeling for weld seam is commonly simplified by neglecting its inhomogeneous mechanical properties. This will cause a significant loss in accuracy of FE forming analysis, in particular, for friction stir welded(FSW) blanks due to the large width and good formability of its weld seam. The inhomogeneous mechanical properties across weld seam need to be well characterized for an accurate FE analysis. Based on a similar AA5182 FSW blank, the metallographic observation and micro-Vickers hardness analysis upon the weld cross-section are performed to identify the interfaces of different sub-zones, i.e., heat affected zone(HAZ), thermal-mechanically affected zone(TMAZ) and weld nugget(WN). Based on the rule of mixture and hardness distribution, a constitutive model is established for each sub-zone to characterize the inhomogeneous mechanical properties across the weld seam. Uniaxial tensile tests of the AA5182 FSW blank are performed with the aid of digital image correlation(DIC) techniques. Experimental local stress-strain curves are obtained for different weld sub-zones. The experimental results show good agreement with those derived from the constitutive models, which demonstrates the feasibility and accuracy of these models. The proposed research gives an accurate characterization of inhomogeneous mechanical properties across the weld seam produced by FSW, which provides solutions for improving the FE simulation accuracy of FSW sheet forming. 展开更多
关键词 constitutive model inhomogeneous mechanical property friction stir welding tailor welded blanks
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Antibacterial Properties of Nano Silver-containing Orthodontic Cements in the Rat Caries Disease Model 被引量:1
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作者 李福军 FANG Ming +1 位作者 PENG Yuying ZHANG Jiayin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第6期1291-1296,共6页
The purpose of this study was to evaluate the antibacterial properties of experimental nano silver-containing cements(NSCs) using rat caries disease model. Nano silver base inorganic antibacterial powder was added t... The purpose of this study was to evaluate the antibacterial properties of experimental nano silver-containing cements(NSCs) using rat caries disease model. Nano silver base inorganic antibacterial powder was added to the reinforced glass ionomer cement at three different weight ratios to obtain a series of nano silver-containing cements, then two orthodontic cement products and three NSC samples were implanted into rat caries disease model, and their antibacterial properties were evaluated by the scanning electron microscope(SEM). Moreover, the rat caries disease model were established by inoculating cariogenic bacteria S mutans into antibiotics treated rat mouths and feeding with cariogenic diet. The tested materials were bonded on the surface of the buccal half crowns of the upper fi rst premolar, and then fi xed under the rats' front teeth lingual side to acquire enough retention. The SEM results indicated that the growth of streptococcus mutans was very active in group of Transbond XT. One month later, S mutans scattered on the GC Fuji ORTHO LC surface, and then the number signifi cantly increased and arranged in chains after three months. In groups of NSC2, NSC3 and NSC4, the number of S mutans presented the downward trend and tended to disperse individually with the increase of silver nanoparticle content. We may conclude that the incorporation of silver nanoparticle enhanced GC Fuji ORTHO LC the adhesion restrain and killing effect to S mutans. 展开更多
关键词 nano silver-containing orthodontic cements rat caries disease model antibacterial properties
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A novel progress of leg tissue properties modeling based on biomechanics
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作者 王沫楠 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第1期57-60,共4页
To describe strategies for addressing technical aspects of computational modeling of leg tissue with the finite element (FE) method, a patient's leg sample was selected and scanned by CT at the direction parallel t... To describe strategies for addressing technical aspects of computational modeling of leg tissue with the finite element (FE) method, a patient's leg sample was selected and scanned by CT at the direction parallel to the Frankfort Horizontal plane. A three-dimensional (3D) finite element model of the human leg was developed using the actual geometry of the leg skeleton and soft tissues, which were obtained from 3D reconstruction of CT images. All joints were defined as contact surfaces, which allow relative articulating movement. The major ligaments were simulated using tension-only truss elements by connecting the corresponding attachment points on the bone surfaces. The bony and ligamentous structures were embedded in a volume of soft tissues. The muscles were defined as non-linear viscoelastic material, and the skin, ligaments and tendons were defined as hyperelastic, while the bony structures were assumed to be linearly elastic. The muhilayer FEM model containing thighbone, tibia, fibula, kneecap, soft tissue was formed after meshing. Diverse forces were imposed on the FEM model. The results show that the multilayer FEM model can represent tissue deformation more accurately. 展开更多
关键词 virtual reality tissue properties model 3D reconstruction finite element method surgery simulation
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Dynamic Mechanical Characteristics and Damage Evolution Model of Granite
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作者 Shuaifeng Wu Yingqi Wei +2 位作者 Hong Cai Bei Jia Dianshu Liu 《Journal of Beijing Institute of Technology》 EI CAS 2018年第2期302-311,共10页
By using the technique of the split Hopkinson pressure bar( SHPB),impact tests at different stress wavelengths( 0. 8-2. 0 m) and strain rates( 20-120 s^(-1)) were conducted to study the dynamic mechanical prop... By using the technique of the split Hopkinson pressure bar( SHPB),impact tests at different stress wavelengths( 0. 8-2. 0 m) and strain rates( 20-120 s^(-1)) were conducted to study the dynamic mechanical properties and damage accumulation evolution lawof granite. Test results showthat the dynamic compressive strength and strain rate of granite have a significantly exponential correlation;the relationship between peak strain and strain rate is approximately linear,and the increase of wavelengths generally makes the level of peak strain uplift. The multiple-impacts test at a lowstrain rate indicates that at the same wavelength,the cumulative damage of granite shows an exponential increasing form with the increase of strain rate; when keeping the increase of strain rate constant and increasing the stress wavelength,the damage accumulation effect of granite is intensified and still shows an exponential increasing form; under the effect of multiple impacts,the damage development trend of granite is similar overall,but the increase rate is accelerating. Therefore the damage evolution model was established on the basis of the exponential function while the physical meaning of parameters in the model was determined. The model can reflect the effect of the wave parameters and multiple impacts. The validity of the model and the physical meaning of the parameters were verified by the test,which further offer a reference for correlational research and engineering application for the granite. 展开更多
关键词 split Hopkinson pressure bar(SHPB) stress wave parameter dynamic mechanical property damage model
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A General Representation of Geometrical Solution Model for Predicting Ternary Thermodynamic Properties
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作者 K.-C.Chou 《Rare Metals》 SCIE EI CAS CSCD 1989年第4期22-26,共5页
The existing geometrical solution models for predicting ternary thermodynamic properties from relevant binary ones have been analysed,and a general representation was proposed in an integral form on the bases of these... The existing geometrical solution models for predicting ternary thermodynamic properties from relevant binary ones have been analysed,and a general representation was proposed in an integral form on the bases of these models. 展开更多
关键词 A General Representation of Geometrical Solution model for Predicting Ternary Thermodynamic Properties EG
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Properties of Optical and X-ray Selected AGN-Probing the Unified Model of AGN
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作者 Karsten Bischoff 《天文研究与技术》 CSCD 北大核心 2003年第S1期74-77,共4页
We have compiled a sample of two subsets of AGN selected from their optical and X ray data. The first subset was selected for very broad and/or peculiar optical emission line profiles, the second for a high X ray flux... We have compiled a sample of two subsets of AGN selected from their optical and X ray data. The first subset was selected for very broad and/or peculiar optical emission line profiles, the second for a high X ray flux. Here we will discuss properties of these galaxies and show that both subsets are very similar in the multi wavelength view. Furthermore, we will discuss differences between the two subsets and their implications for a Unified Model of AGN. 展开更多
关键词 Properties of Optical and X-ray Selected AGN-Probing the Unified model of AGN Figure FWHM of
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A New Symmetric Model for Predicting Ternary Thermodynamic Properties from its Three Binary Systems
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作者 K.-C.Chou R.-Q.Li 《Rare Metals》 SCIE EI CAS CSCD 1989年第4期12-17,共6页
A new symmetric model for predicting ternary thermodynamic properties from its three binary systems has been presented. The application of this new model to the prediction of the ternary mixing enthalpy of Ga-Bi-Sn sy... A new symmetric model for predicting ternary thermodynamic properties from its three binary systems has been presented. The application of this new model to the prediction of the ternary mixing enthalpy of Ga-Bi-Sn system and the ternary excess Gibbs energy of AgCl-LiCl-KCl system shows that the calculated results are close to the experimental data. 展开更多
关键词 A New Symmetric model for Predicting Ternary Thermodynamic Properties from its Three Binary Systems
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Effective electromechanical properties of cellular piezoelectret:A review 被引量:1
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作者 Yong-Ping Wan Zheng Zhong 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2012年第4期951-959,共9页
Due to the large quasi-piezoelectric d33 coefficient in the film thickness direction, cellular piezoelectret has emerged as a new kind of compliant electromechanical transducer materials. The macroscopic piezoelectric... Due to the large quasi-piezoelectric d33 coefficient in the film thickness direction, cellular piezoelectret has emerged as a new kind of compliant electromechanical transducer materials. The macroscopic piezoelectric effect of cellular piezoelectret is closely related to the void microstructures as well as the material constants of host polymer. Complex void microstmctures are usually encountered in the optimum design of cellular piezoelectret polymer film with ad- vanced piezoelectric properties. Analysis of the effective electromechanical properties is generally needed. This article presents an overview of the recent progress on theoretical models and numerical simulation for the effective electromechanical properties of cellular piezoelectret. Emphasis is placed on our own works of cellular piezoelectret published in past several years. 展开更多
关键词 Cellular piezoelectret film. Effective electromechanical properties ~ Theoretical models Numerical simulation
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Influence of core sand properties on flow dynamics of core shooting process based on experiment and multiphase simulation 被引量:2
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作者 Chang-jiang Ni Gao-chun Lu +1 位作者 Tao Jing Jun-jiao Wu 《China Foundry》 SCIE 2017年第2期121-127,共7页
The influence of core sand properties on flow dynamics was investigated synchronously with various core sands, transparent core-box and high-speed camera. To confirm whether the core shooting process has significant t... The influence of core sand properties on flow dynamics was investigated synchronously with various core sands, transparent core-box and high-speed camera. To confirm whether the core shooting process has significant turbulence, the flow pattern of sand particles in the shooting head and core box was reproduced with colored core sands. By incorporating the kinetic theory of granular flow(KTGF), kinetic-frictional constitutive correlation and turbulence model, a two-fluid model(TFM) was established to study the flow dynamics of the core shooting process. Two-fluid model(TFM) simulations were then performed and a areasonable agreement was achieved between the simulation and experimental results. Based on the experimental and simulation results, the effects of turbulence, sand density, sand diameter and binder ratio were analyzed in terms of filling process, sand volume fraction(αs) and sand velocity(Vs). 展开更多
关键词 core shooting process sand property binder ratio two-fluid model flow dynamic turbulence
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Mechanical properties of lattice grid composites 被引量:2
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作者 Hualin Fan Daining Fang Fengnian Jin 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2008年第4期409-418,共10页
An equivalent continuum method only considering the stretching deformation of struts was used to study the in-plane stiffness and strength of planar lattice grid com- posite materials. The initial yield equations of l... An equivalent continuum method only considering the stretching deformation of struts was used to study the in-plane stiffness and strength of planar lattice grid com- posite materials. The initial yield equations of lattices were deduced. Initial yield surfaces were depicted separately in different 3D and 2D stress spaces. The failure envelope is a polyhedron in 3D spaces and a polygon in 2D spaces. Each plane or line of the failure envelope is corresponding to the yield or buckling of a typical bar row. For lattices with more than three bar rows, subsequent yield of the other bar row after initial yield made the lattice achieve greater limit strength. The importance of the buckling strength of the grids was strengthened while the grids were relative sparse. The integration model of the method was used to study the nonlinear mechanical properties of strain hardening grids. It was shown that the integration equation could accurately model the complete stress-strain curves of the grids within small deformations. 展开更多
关键词 Lattice grid composites· Mechanical properties·Buckling ·Plastic deformation·Analytical modeling
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Structural, Anisotropic and Thermodynamic Properties of Imm2-BCN
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作者 邢孟江 li binhua +1 位作者 yu zhengtao chen qi 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第6期1272-1279,共8页
Structural, anisotropic, and thermodynamic properties of Imm2-BCN were studied based on density function theory with the ultrasoft psedopotential scheme in the frame of the generalized gradient approximation(GGA). T... Structural, anisotropic, and thermodynamic properties of Imm2-BCN were studied based on density function theory with the ultrasoft psedopotential scheme in the frame of the generalized gradient approximation(GGA). The elastic constants were confirmed that the predicted Imm2-BCN is mechanically stable. The anisotropy of elastic properties were also studied systematically. The anisotropy studies of Young's modulus, shear modulus, linear compressibility, and Poisson's ratio show that the Imm2-BCN exhibits a large anisotropy. Through the quasi-harmonic Debye model, the relations between the equilibrium volume V, thermal expansion α, the heat capacity C_V and CP, the Grüneisen parameter γ, and the Debye temperature Θ_D with pressure P and temperature T were also studied systematically. 展开更多
关键词 anisotropic properties thermodynamic properties the quasi-harmonic Debye model BCN
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Nonlinearity of muscle stiffness
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作者 Jan Awrejcewicz G.Kudra B.Zagrodny 《Theoretical & Applied Mechanics Letters》 2012年第5期46-48,共3页
In this letter, a comparison between three types (two linear and one nonlinear) of models of skeletal muscle stiffness is shown. Results are compared with experimental data for biceps brachii in the case of muscle s... In this letter, a comparison between three types (two linear and one nonlinear) of models of skeletal muscle stiffness is shown. Results are compared with experimental data for biceps brachii in the case of muscle stretching and with the Hill equation for a biological muscle. It is shown that results for nonlinear stiffness model in case of length-force relationship fits to the experimental data. 展开更多
关键词 muscle modeling muscle stiffness biological and muscle model properties
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Composite structural modeling and tensile mechanical behavior of graphene reinforced metal matrix composites 被引量:9
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作者 苏益士 李赞 +5 位作者 俞洋 赵蕾 李志强 郭强 熊定邦 张荻 《Science China Materials》 SCIE EI CSCD 2018年第1期112-124,共13页
Owing to its distinguished mechanical stiffness and strength, graphene has become an ideal reinforcing material in kinds of composite materials. In this work, the graphene(reduced graphene oxide) reinforced aluminum... Owing to its distinguished mechanical stiffness and strength, graphene has become an ideal reinforcing material in kinds of composite materials. In this work, the graphene(reduced graphene oxide) reinforced aluminum(Al)matrix composites were fabricated by flaky powder metallurgy. Tensile tests of pure Al matrix and graphene/Al composites with bioinspired layered structures are conducted.By means of an independently developed Python-based structural modeling program, three-dimensional microscopic structural models of graphene/Al composites can be established, in which the size, shape, orientation, location and content of graphene can be reconstructed in line with the actual graphene/Al composite structures. Elastoplastic mechanical properties, damaged materials behaviors, grapheneAl interfacial behaviors and reasonable boundary conditions are introduced and applied to perform the simulations. Based on the experimental and numerical tensile behaviors of graphene/Al composites, the effects of graphene morphology,graphene-Al interface, composite configuration and failure behavior within the tensile mechanical deformations of graphene/Al composites can be revealed and indicated, respectively.From the analysis above, a good understanding can be brought to light for the deformation mechanism of graphene/Al composites. 展开更多
关键词 graphene/Al composites structural modeling mechanical properties composite configuration failure behavior
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3D geocellular modeling for reservoir characterization of lacustrine turbidite reservoirs:Submember 3 of the third member of the Eocene Shahejie Formation,Dongying depression,Eastern China
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作者 Marco Shaban Lutome Chengyan Lin +2 位作者 Dong Chunmei Xianguo Zhang Januarius Matata Bishanga 《Petroleum Research》 2022年第1期47-61,共15页
3D geocellular modeling is increasingly essential in the petroleum industry;it brings together all petroleum disciplines,and it is commonly used in simulation and production forecast.However,modeling slope and deep-wa... 3D geocellular modeling is increasingly essential in the petroleum industry;it brings together all petroleum disciplines,and it is commonly used in simulation and production forecast.However,modeling slope and deep-water turbidite reservoirs using conventional modeling methods pose a significant challenge due to the structural complexity and thin-beds associated with these reservoirs.Through the innovative modeling technology of PaleoScan,the reservoirs in Sub member 3 of the third member of the Shahejie Formation are modeled to understand the structural framework.The resulting model is populated with petrophysical properties i.e.,porosity and permeability to predict their lateral and vertical distribution within these sandstone reservoirs.The study suggests that the reservoir in the highstand system tract(HST)is characterized by the clinoforms configuration framework.The reservoir is highly faulted mainly in the northern and southeastern parts of the depression.The sedimentary layers are deposited across the slope and downlapping,thinning,and terminating toward to the west.The two isochore surface maps reveal sediment thickness variation and depositional trends within each individual depositional layer.The zones or areas that corresponds to low values on the thickness maps suggest minor uplifts associated with intensive faulting in the Eocene period.These topographical highs played a fundamental role in distributing the sediments delivered to the basin from distant sources.The maps reveal that sediments that filled the basin appear to come from different source points,primarily delivered from the north,southeast,and northeast of the basin with varying depositional trends.The modeled porosity and permeability indicate that the delta fed turbidite reservoirs are characterized by medium to high porosity values of 10e20%and low to medium permeability values of 30-410mD,respectively.The porosity values increase to the southeast and toward the basinwards(west)while permeability varies within the individual sedimentary layers.The distribution of porosity and permeability is not uniform vertically.This suggests the presence of mixed none-reservoir layers with locally and periodically deposited sandstone reservoirs within the stratigraphic during rapid delta progradation.The HST is characterized by six different delta progradation cycles;each phase produced locally deposited lacustrine turbidite sandstones in the basin,which are essential reservoirs in this Formation.The innovative PaleoScan interpretation technology has successfully created a high-resolution 3D reservoir model of this complex geology-such innovative technology is vital to similar complex geology globally. 展开更多
关键词 Geomodelling Geocellular modelling Dongying depression property modelling Reservoir characterization Lacustrine turbidites
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