scholarly journals Pengaruh Kelas Kemiringan Lereng dan Penggunaan Lahan terhadap Sifat Fisik Tanah di Kawasan Penyangga Waduk Cirata Kecamatan Cipeundeuy Kabupaten Bandung Barat

SoilREns ◽  
2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Apong Sandrawati ◽  
Ade Setiawan ◽  
Gilang Kesumah
Keyword(s):  
Bulk Density ◽  
Power Plants ◽  
Water Reservoir ◽  
Physical Property ◽  
Analysis Data ◽  
Rubber Plantation ◽  
Landuse Change ◽  
Land Unit ◽  
Porosity And Permeability ◽  
Independent Variable

 Waduk Cirata  is  one of  impormant  water reservoir  in West  Java.  This  reservoir  was  used  for supporting  power plants  for Java  and Bali’s  area.  It’s  need  more attention  to  keep  the  function continuity  of  Waduk Cirata.  Greenbelt  area  was  one  of  factor determinant  for  establishment  of Waduk Cirata. Landuse change in greenbelt area is a great threat for greenbelt area sustainability, future more to establishment of Waduk Cirata. This research was aimed to study the effect of landuse and slope combination to physical property of soil. The research was conducted in greenbelt area of Waduk  Cirata,  located  in  Margalaksana  and Nenggeleng Village,  Cipeundeuy  District,  Bandung Barat.  The  independent  variable was  three landuse  type  and two  class  of  slope,  so  that  were six combination variable that repeated four times, so there was 24 land unit. This land unit determinedwith  overlay  tools  in ArcGIs software.  Statistical  analysis  used  for determined  the effect  andrelationship between parameter. Based on analysis data, combination of landuse type and class of slope not  influence  bulk density,  porosity,  and permeability  value.  Rubber plantation with  class  of slope 8-15%  has  higher bulk density  (1.24  g/cm3) and higher porosity  (66.7  %),  meanwhile,  the higher of permeability (9.31cm/hour) found in cocoa plantation with class of slope 16-25%.Keywords: greenbelt area, landuse, class of slope, bulk density, porosity, permeability.

Research on the Distriution Rules and Calculation Method of the Parameters of Reservoir of Putaohua Groups in Yushulin Oil Field

2014 ◽  
Vol 490-491 ◽  
pp. 468-472
Author(s):  
Ke Zeng ◽  
Zheng Zhou ◽  
Mei Ling Zhang
Keyword(s):  
Physical Property ◽  
Analysis Data ◽  
Well Logging ◽  
Oil Field ◽  
Core Analysis ◽  
The Core ◽  
Reservoir Property ◽  
Porosity And Permeability ◽  
The Relationship ◽  
Parameters Calculation

Based on the Putaohua groups in Yushulin oil field, and through the statiscics and analyses, weve found that the reservoir property of this area is in the range of specially low permeability level. So due to the low porosity and permeability, its necessary to do some reaearch on the parameters calculation method.This papers analysed the relationships between the physical property parameters such as porosity, permeability, shale content and the well logging responses such as AC, SP, GR, then we built the distribution rules histograms of each physical property parameter. And we got the distribution situations of the parameters of the oil groups. Through the multiple regression, we built the relationship formulas between the reservoir property parameters and the well logging responses by using the core analysis data of 53 test wells. Afetr comparing the parameters of calculation and the core analysis data, we found that the deviation is small, which meets the production requires of oil field.

Study on Primary Controlling Factors to Carbonate Reservoir Physical Properties of Zhanazhol Oilfield

2013 ◽  
Vol 734-737 ◽  
pp. 183-188
Author(s):  
Ling He ◽  
Jian Xin Li ◽  
Rui Lin Liu ◽  
Da Hua Zhao ◽  
Man Luo
Keyword(s):  
Physical Properties ◽  
Physical Property ◽  
Analysis Data ◽  
Controlling Factors ◽  
Carbonate Reservoir ◽  
Fracture Type ◽  
Pore Connectivity ◽  
Thin Sections ◽  
Porosity And Permeability ◽  
Physical Property Data

By the aid of such core analysis data as lithochemical data, physical property data, thin sections and capillary pressure curves, studies were made on the physical properties and its primary controlling factors of carboniferous carbonate reservoirs of Zhanazhol oilfield. The studies were focused on such aspects as lithology, void type, pore connectivity, developing degree of vugs and fractures and fracture type. The study shows that the reservoirs of KT-I are principally multiple void-typed with middle porosity and permeability, with lithology, developing degree of vugs and fractures and fracture type being the primary controlling factors to their physical properties, and that the reservoirs of KT-II are principally fracture-pore typed with low to middle porosity and permeability, with lithology, void type, pore connectivity and fracture type being the primary controlling factors.

scholarly journals Correlation between the Porosity and Permeability of a Polymer Filter Fabricated via CO2-Assisted Polymer Compression

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 391 ◽  
Author(s):  
Takafumi Aizawa ◽  
Yoshito Wakui
Keyword(s):  
Pore Size ◽  
Gas Permeability ◽  
Physical Property ◽  
Polymer Fibers ◽  
Darcy Law ◽  
Compression Method ◽  
Porosity Reduction ◽  
Sintered Porous Material ◽  
Porosity And Permeability ◽  
Size Data

A porous filter was fabricated by plasticizing polymer fibers with CO2, followed by pressing and adhering; then, its gas permeability, a basic physical property of filters, was measured using N2. The as-obtained filter was well compressed and expected to approximate a sintered porous material. Therefore, the fabricated filter was analyzed by applying the Darcy law, and the correlation between its gas permeability and porosity was clarified. The gas permeability decreased owing to both pore size and porosity reduction upon increasing the degree of compression, which is a feature of the CO2-assisted polymer compression method. In particular, without any contradiction of pore size data previously reported, the gas permeability was clearly determined by the filter porosity and pore size. This study can serve as a guide for designing filters via CO2-assisted polymer compression.

scholarly journals Fluid Saturation Predictions in a “Transition Zone” Carbonate Reservoir, Abu Dhabi

GeoArabia ◽  
1996 ◽  
Vol 1 (4) ◽  
pp. 551-566
Author(s):  
Anthony Kirkham ◽  
Mohamed Bin Juma ◽  
Tilden A.M. McKean ◽  
Anthony F. Palmer ◽  
Michael J. Smith ◽  
...  
Keyword(s):  
Transition Zone ◽  
Free Water ◽  
Analysis Data ◽  
Carbonate Reservoir ◽  
Rock Types ◽  
Fluid Saturation ◽  
Porosity And Permeability ◽  
Capillary Pressures ◽  
Seismic Amplitudes ◽  
Low Amplitude

ABSTRACT The field is a low amplitude structure with a chalky, Lower Cretaceous, Thamama reservoir characterised by a large hydrocarbon transition zone. Porosity generally decreases with depth within the trap although porosity versus depth trends are skewed by tilting. Porosity and permeability mapping was therefore achieved using templates based on seismic amplitudes. Special core analysis data were used to construct algorithms of Leverett J functions versus saturation for a variety of rock types mapped throughout the 3-D geological model of the field. The templated poroperms were then combined with capillary pressures to predict fluid saturations from these algorithms. The modelling of fluid distributions was therefore dependent upon heterogeneities imposed by the rock fabrics. Calibrating the model-predicted saturations against log-derived saturations at the wells involved regression techniques which were complicated by: notional structural tilting of the free water level, imbibition, hysteresis and permeability averaging procedures. Filtered “stick displays” proved useful in assessing the quality of the calibrations and were invaluable tools for highlighting and investigating data anomalies.

Experimental Study of Selected Properties of Heavyweight Concrete Based on Analysis of Chemical Composition and Radioactive Elements of its Components

2021 ◽  
Vol 321 ◽  
pp. 113-118
Author(s):  
Janette Dragomirová ◽  
Martin T. Palou ◽  
Katalin Gméling ◽  
Veronika Szilágyi ◽  
Ildikó Harsányi ◽  
...  
Keyword(s):  
Bulk Density ◽  
Nuclear Power ◽  
Power Plants ◽  
Concrete Strength ◽  
Prompt Gamma ◽  
Longitudinal Deformation ◽  
Heavyweight Concrete ◽  
Furnace Slag ◽  
Selection Of

Heavyweight concrete is mostly used for its shielding properties in the nuclear power plants. These properties can already be influenced by the selection of the input materials. In the present study, concrete samples comprised of four-component binders based on CEM I 42.5 R, blast furnace slag, metakaolin and limestone and a mixture of barite and magnetite aggregate, were investigated. Based on Energy Dispersive X-ray Fluorescence, Neutron Activation, and Prompt-Gamma Activation analyses, three concrete designs were prepared and tested. Mechanical, physical (namely cubic compressive strength, bulk density, longitudinal deformation, and dynamic modulus of elasticity) and thermal properties (thermal conductivity coefficient, specific heat capacity, and thermal diffusivity), which should be influenced by the long-term exposure to irradiation were investigated. Presented results confirmed that the prepared samples are heavyweight concrete with bulk density higher than 3400 kg.m-3 with a low level of longitudinal deformation (between 0.265 ‰ and 0.352 ‰). All the prepared samples belong to the C 35/45 concrete strength class.

On: “Causes of compressional wave anisotropy in carbonate bearing deep sea sediment” by R. L. Carlson, C. H. Schaftenaar, and R. P. Moore (GEOPHYSICS, 49, 525– 532, May, 1984).

Geophysics ◽  
1985 ◽  
Vol 50 (3) ◽  
pp. 505-505
Author(s):  
H. N. Collins
Keyword(s):  
Linear Regression ◽  
Bulk Density ◽  
Deep Sea ◽  
Compressional Wave ◽  
Regression Equation ◽  
Fluid Density ◽  
Deep Sea Sediment ◽  
Independent Variable ◽  
Calcareous Sediment

In the course of presenting data on the application of linear regression, the authors included in Figure 1 an equation representing the regression of wet‐bulk density on porosity in the form [Formula: see text], where [Formula: see text] and [Formula: see text] are wet‐bulk and grain densities, respectively, in [Formula: see text]. Based on the data of the selected samples shown in Figure 1, they have inferred a grain density of [Formula: see text], and a fluid density of [Formula: see text], not unreasonable values for a brine‐saturated calcareous sediment. However, it is incorrect to draw such inferences from this regression equation without the qualification that the independent variable, in this case porosity, is error free. Based on the porosity values shown in Table 1 (see my Table 1) those data are indeed subject to error.

Reservoir Physical Property and Controlling Factors for the Lower Youshashan Formation in Youshashan-Dawusi Area, Southwestern Qaidam Basin

2014 ◽  
Vol 675-677 ◽  
pp. 1363-1367 ◽  
Author(s):  
Guo Min Chen ◽  
Quan Wen Liu ◽  
Min Quan Xia ◽  
Xiang Sheng Bao
Keyword(s):  
Qaidam Basin ◽  
Sedimentary Environment ◽  
Physical Property ◽  
Controlling Factors ◽  
Reservoir Rock ◽  
High Porosity ◽  
Delta Front ◽  
Thin Sections ◽  
Rock Types ◽  
Porosity And Permeability

The core data, casting thin sections and scanning electron microscopy are used to study the clastic reservoir characteristics and controlling factors of reservoir growth. It indicated that the main reservoir rock types are lithic arkose, Feld spathic sandstone, and a small amount of feldspar lithic sandstone, and with compositional maturity and low to middle structural maturity. Moreover, the primary reservoir space types are mainly intergranular pores, secondary are secondary pores, and reservoir types belong to the medium-high porosity and permeability, and the average porosity and permeability of lower Youshashan formation are 17.70% and 112.5×10-3μm2 separately. Furthermore, the reservoir body is mainly sand body result from deposits of distributary channel and mouth bar of which belong to the braided delta front, and the planar physical property tends to be better reservoir to worse reservoir from northwest to southeast. Finally, mainly factors to control the distribution of reservoir physical property, are the sedimentary environment and lithology, were worked out.

scholarly journals Evaluation of Property Methods for Modeling Direct-Supercritical CO2 Power Cycles

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Charles W. White ◽  
Nathan T. Weiland
Keyword(s):  
Power Plants ◽  
Physical Property ◽  
Aspen Plus ◽  
Cost Effective ◽  
Operating Conditions ◽  
Working Fluid ◽  
Power Cycles ◽  
As Species ◽  
Cost Effective Method ◽  
Open Nature

Direct supercritical carbon dioxide (sCO2) power cycles are an efficient and potentially cost-effective method of capturing CO2 from fossil-fueled power plants. These cycles combust natural gas or syngas with oxygen in a high pressure (200–300 bar), heavily diluted sCO2 environment. The cycle thermal efficiency is significantly impacted by the proximity of the operating conditions to the CO2 critical point (31 °C, 73.7 bar) as well as to the level of working fluid dilution by minor components, thus it is crucial to correctly model the appropriate thermophysical properties of these sCO2 mixtures. These properties are also important for determining how water is removed from the cycle and for accurate modeling of the heat exchange within the recuperator. This paper presents a quantitative evaluation of ten different property methods that can be used for modeling direct sCO2 cycles in Aspen Plus®. Reference fluid thermodynamic and transport properties (REFPROP) is used as the de facto standard for analyzing high-purity indirect sCO2 systems, however, the addition of impurities due to the open nature of the direct sCO2 cycle introduces uncertainty to the REFPROP predictions as well as species that REFPROP cannot model. Consequently, a series of comparative analyses were performed to identify the best physical property method for use in Aspen Plus® for direct-fired sCO2 cycles. These property methods are assessed against several mixture property measurements and offer a relative comparison to the accuracy obtained with REFPROP. The Lee–Kessler–Plocker equation of state (EOS) is recommended if REFPROP cannot be used.

Study on Plastic Strain and Plastic Strain Rate in Machining of Steel AISI 1020 Using FEM Analysis

2014 ◽  
Vol 960-961 ◽  
pp. 245-248
Author(s):  
Qi Qin ◽  
Shi Zhong Ma ◽  
Peng Yun Li ◽  
Ming Wei Wang
Keyword(s):  
Plastic Strain ◽  
Physical Property ◽  
Fem Analysis ◽  
Plastic Strain Rate ◽  
Distribution Area ◽  
Physical Parameters ◽  
Distribution Diagram ◽  
Porosity And Permeability ◽  
The Difference ◽  
Physical Property Data

Based on analyzing and testing the core samples of three inspection wells, we research in-layer heterogeneity of the main types monosandbody; in order to build macroscopic analysis on the difference of physical properties in reservoir interbedded, we can also draw distribution diagram of the interbedded sandstone’s average porosity and permeability through the physical property data in the study area, meanwhile it is necessary to use statistic data of physical parameters including variation coefficient, mutation coefficient and range to draw tables，which can show the degree of heterogeneity of monosandbody in the reservoir become much stronger from top to bottom; In addition, according to the study of plane microfacies and monosandbody, the information relating to the heterogeneity of the main monosandbody can be acquired. In conclusion, it is clear to know the distribution characteristics of remaining oil deriving from FuYu oil layer in the Chao 45 Block, and the distribution area of residual potential of microfacies by reducing the heterogeneity of reservoir to improve the connectivity, and then increase the mining effect.

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