Hydrocarbon prospects across Narmada-Tapti rift in Deccan trap, central India: Inferences from integrated interpretation of magnetotelluric and geochemical prospecting studies     

K.K. Abdul Azeez  T. Satish Kumar Sharana Basava  T. Harinarayana A.M. Dayal 《Marine and Petroleum Geology》2011,28(5):1073-1082

As the Mesozoic sediments contribute most of the oil and gas reserves of the world, we present an integrated interpretation approach using magnetotellurics (MT) and surface geochemical prospecting studies to demarcate hydrocarbon prospective Gondwana (Mesozoic) formations underneath the Deccan flood basalts of Late Cretaceous age across Narmada-Tapti rift (between Bhusawal and Barwah) in Central India. The MT interpretation shows deep (∼5 km) basement structure between southern and central part of the MT profile however, it gradually becomes shallower to either ends of the profile with a predominant basement depth reduction in the northern end compared to the southern end. The geophysical results suggest thick (2-3.5 km) Mesozoic sediments in the area characterized by deep basement structure. The geochemical analysis of the near surface soil samples indicate higher concentrations of light gaseous hydrocarbons constituents over the area marked with thick sub-basalt Mesozoic formations. Analyses of the geochemical data imply that these hydrocarbons are genetically related, generated from a thermogenic source and these samples fall in the oil-producing zone. The temperature-depth estimations in the region supports favorable temperature conditions (80-120 °C) for oil generation at basement depths.  相似文献   

Evaluation of an Ultrafiltration Method for Surfactant Recovery and Reuse During In Situ Washing of Contaminated Sites: Laboratory and Field Studies   总被引：1，自引：0，他引：1  

Carolina C. Ang  Abdul S. Abdul 《Ground Water Monitoring & Remediation》1994,14(3):160-171

Feasibility studies were conducted on the use of ultrafillration to recover surfactant from aqueous waste streams generated from the in situ surfactant washing of a site contaminated with poly-chlorinated biphenyls (PCBs) and oils. A Romicon Model HF-Lab-5 ultrafiltration unit and three types of ultrafillration membranes (PM500, XM50, and CM50) were evaluated for their permeability to a nonionic surfactant previously selected for the in situ washing. Results from laboratory studies using the XM50 membrane cartridge showed that 78 percent of the surfactant passed through the membrane surface (permeate) and was recovered.
Two field-pilot tests of the ultrafiltralion system were conducted using leachate containing a mixture of water, oils, PCBs, and surfactant that was collected from an in situ surfactant-washing demonstration test. Forty-six percent of the surfactant (mass) was recovered during the first field test using the XM50 membrane. The membrane retained 94 percent of the PCBs and 89 percent of the oils. The second field test showed that the PM500 membrane recovered 67 percent of the surfactant in the permeate and retained more than 90 percent and 83 percent of the PCBs and oils, respectively. This study indicates that a significant volume of a nonionic surfactant can be recovered from leachatc mixture containing PCBs and oils by ultrafillration. The recovered surfactant could be reused to improve the economic viability of in situ surfactant washing of contaminated sites.  相似文献   

Selection of Surfactants for the Removal of Petroleum Products from Shallow Sandy Aquifers   总被引：5，自引：0，他引：5  

Abdul S. Abdul  Thomas L. Gibson  Devi N. Rai 《Ground water》1990,28(6):920-926

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Migration of Petroleum Products Through Sandy Hydrogeologic Systems   总被引：5，自引：0，他引：5  

Abdul S. Abdul 《Ground Water Monitoring & Remediation》1988,8(4):73-73

Laboratory column experiments were carried out to study the migration of petroleum products through a sandy porous medium. It was found that the oil pressure needed to displace water from the pores of the sand medium increased with depth below the top of the column. While oil under negative pressure displaced water through the variably unsaturated zone, a significant vertical column of oil was needed to displace water from the pores at the water table. These results indicate that oil penetration to and below the water table will occur only if the porous medium is highly conductive and the rate of oil leak is high. For small to moderate leak rates and hydraulic conductivities, oil would preferentially spread laterally through the zones above the water table. This process of spreading could serve as a natural barrier to severe aquifer contamination by petroleum products.
A simplified procedure was developed to give an order-of-magnitude estimate of the preferred subsurface migration pathways of leaked petroleum products. This procedure utilizes the main drainage and wetting curves for oil and water and the interfacial pressure between these two fluids. This approach could be useful in guiding exploratory investigations, reducing both the risk for further spreading of the contaminants and the investigative cost.  相似文献   

Prediction of climate change in Brunei Darussalam using statistical downscaling model     

Hasan  Dk. Siti Nurul Ain binti Pg. Ali  Ratnayake  Uditha  Shams  Shahriar  Nayan  Zuliana Binti Hj  Rahman  Ena Kartina Abdul 《Theoretical and Applied Climatology》2018,133(1-2):343-360

Theoretical and Applied Climatology - Climate is changing and evidence suggests that the impact of climate change would influence our everyday lives, including agriculture, built environment,...  相似文献   

Continuous velocity fields for collapse and blowout of a pressurized tunnel face in purely cohesive soil   总被引：1，自引：0，他引：1  

Guilhem Mollon  Daniel Dias  Abdul‐Hamid Soubra 《国际地质力学数值与分析法杂志》2013,37(13):2061-2083

Face stability analysis of tunnels excavated under pressurized shields is a major issue in real tunnelling projects. Most of the failure mechanisms used for the stability analysis of tunnels in purely cohesive soils were derived from rigid block failure mechanisms that were developed for frictional soils, by imposing a null friction angle. For a purely cohesive soil, this kind of mechanism is quite far from the actual velocity field. This paper aims at proposing two new continuous velocity fields for both collapse and blowout of an air‐pressurized tunnel face. These velocity fields are much more consistent with the actual failures observed in undrained clays. They are based on the normality condition, which states that any plastic deformation in a purely cohesive soil develops without any volume change. The numerical results have shown that the proposed velocity fields significantly improve the best existing bounds for collapse pressures and that their results compare reasonably well with the collapse and blowout pressures provided by a commercial finite difference software, for a much smaller computational cost. A design chart is provided for practical use in geotechnical engineering. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   

Kinetics of Methyldiethanolamine Mineralization by Using UV/H2O2 Process     

Sabtanti Harimurti  Anisa Ur Rahmah  Abdul Aziz Omar  Murugesan Thanapalan 《洁净——土壤、空气、水》2013,41(12):1165-1174

The UV/H₂O₂ is one of the popular techniques in the advanced oxidation processes (AOPs) and has been applied in the wastewater treatment during recent two decades. UV exposure on the H₂O₂ generate highly reactive hydroxyl radicals (OH^?), which are used to degrade organic contaminants through oxidation processes in wastewater. This present study involves the estimation of hydroxyl radical rate constants of methyldiethanolamine (MDEA) mineralization at different temperatures by using UV/H₂O₂ in aqueous solution. Laboratory experiments have been conducted and the profile of MDEA mineralization has been established. The hydroxyl radical rate constants and the activation energy of mineralization process have been calculated. The estimated hydroxyl rate constants and the activation energy are in good agreement with those reported in the literature.  相似文献   

Geotopes of mountain territories: Definitions, approaches to the study, protection     

V. Yu. Khalatov  S. N. Abdul’myanov 《Geography and Natural Resources》2013,34(1):14-19

Geographical places of interest of mountain territories are discussed. A comprehensive definition of the notion of “geotope” is provided, which takes into consideration its uniqueness, individuality and accessibility for study and popularization. A relevant classification of geotopes and approaches in studying them have been developed. Attention is drawn to the possibilities of protecting mountain geotopes, and to the need fro a popularization of geotopes in the geographical knowledge system. A case in point is provided by the record cards and the catalogue of geotopes as well as by websites with information bases of data on geographical attractions of mountain territories.  相似文献   

Considerations about the occurrence of pollen grains of theValeriana eichleriana （C. A. Muller） Graebner, in sediments ofthe Upper Quaternary in the state of Rio Grande do Sul, Brazil     

PauloC.P.Neves SoraiaG.Bauermann MariaG.Rossoni JoseR.R.Coiro MarleniM.Toigo AbdulR.Ashraf 《东北亚地学研究》2004,7(1):1-7

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巴基斯坦西俾路支省Chagai地区Saindak斑岩铜金矿床高锶低钇中酸性岩地球化学     

Abdul Shakoor MASTOI  DENG Jianghong  YANG Xiaoyong 《地质论评》2016,62(S1):157-158

The Chagai arc is located in southwest of Pakistan and extends into Iran and Afghanistan (Fig.1A). The border between eastern Iran and western Pakistan roughly coincides with the transition from the collisional Zagros orogenic belt in the west to the Makran accretionary complex and Chagai magmatic arc in the east Siddiqui (2004). The Baluchistan (or Makran) magmatic arc, is an east-west trending, ~500 km long and up to 140 km wide belt of calc-alkaline plutonic, volcanic, and sedimentary rocks, which is part of the continental-scale Tethyan belt that spans eastern Europe and Asia. Activity along the arc began in the Late Cretaceous and continued through into the Quaternary.  相似文献