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Advances in sediment geochemistry and chemostratigraphy for reservoir characterization

Energy Geoscience 2021年第4期2卷 308-326页

作者： Mu ramkumar r.nagarajan M.Santosh Department of Geology Periyar UniversitySalem636011India Department of Applied Geology Curtin UniversityMalaysia Curtin Malaysia research Institute Curtin UniversityMalaysia School of Earth Sciences and resources China University of Geosciences BeijingBeijingChina Department of Earth Sciences University of AdelaideAdelaideSA5005Australia

Sedimentary sequences preserve the records of changes in major controls of sedimentation namely,tectonics,climate,relative sea level and sediment production and *** potential to characterize these changes in spatial and temporal scales has led to the development of the branch of *** study of sedimentary sequences commenced from recognizing identical/contrasting geochemical features across major geochronological boundaries,and evolved into one of the essential tools in exploration,characterization,and well development *** incorporates applications on continuous,real-time geochemical mapping and direction of lateral drilling,and machine learning,among *** the sedimentary systems operate on a variety of temporal scales that range from few hours(tidal cycles)to few tens of millions of years,within which many perturbations such as catastrophic and diagenetic events take place,that lead to unique geochemical signature which can be correlated at appropriate spatial and temporal *** application of chemostratigraphic technique in hydrocarbon exploration and reservoir characterization has gained momentum in recent years,particularly with the advent of developments in analytical *** has also led to the integration of a variety of data from field sedimentary structures,mineralogy,major,trace and isotopic chemical compositions of whole rock,selected components of rocks,organic and inorganic components of oil and gas,etc.,for reservoir characterization more accurately than *** geochemical fingerprinting of oil and gas reservoir components plays a major role in the identification of source rocks,discrimination of oil families,characterization of reservoir,source,and seal segments in petroleum *** trends indicate the relevance and growing applications of machine learning techniques,artificial intelligence in real-time assessment,monitoring and planning of hydrocarbon

关键词： Biomarker Chemostratigraphy Geochemical fingerprinting Machine learning Oil family Stratigraphic correlation

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reservoir characterization and enhanced oil recovery: Preface

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Energy Geoscience 2021年第4期2卷 285-286页

作者： Mu ramkumar r.nagarajan M.Santosh Department of Geology Periyar UniversitySalem636011India Department of Applied Geology Faculty of Engineering and ScienceCurtin UniversityMalaysia Curtin Malaysia research Institute Curtin UniversityMalaysia China University of Geosciences Beijing No.29 Xueyuan RoadHaidian DistrictBeijing100083PR China

A systematic and thorough understanding of the reservoir facies,commencing from exploration methods,identification,and precise characterization and predicting applicable analogues are essential tasks that form the cru... 详细信息

关键词： reservoir facies exploration

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Petrography and stable isotopic variations in Dalmiapuram Formation of Cauvery Basin, South India: implication on OAE1d

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Chinese Journal Of Geochemistry 2015年第3期34卷 447-458页

作者： J.Madhavaraju A.N.Sial S.M.Hussain r.nagarajan S.ramasamy Estación regional del Noroeste Instituto de GeologíaUniversidad Nacional Autónoma de México Nucleo de Estudos Geoquímicos e Laborató rio de Isótopos Estáveis (NEG - LABISE) Departmento de GeologiaUniversidade Federal de Pernambuco Department of Geology University of Madras Department of Applied Geology School of Engineering and Science Curtin University

Petrography, carbon and oxygen isotopic study was carried out to interpret isotopic variations on the predominant carbonate sequence of the Dalmiapuram Formation of the Cauvery Basin, South India. The common petrographic types identified in the Dalmiapuram Formation range from wackestone to boundstone. The gray shale and limestone members show large variations in d13 C and d18 O values(Gray shale member: +1.44 to +2.40 %VPDB,-3.05 to-5.92 % VPDB, respectively; Limestone member:-6.07 to +2.93 % VPDB;-7.08 to-0.39 %VPDB; respectively). In the present study, the carbon and oxygen values are not correlated, which supports the fact that these limestones retain their primary isotopic signatures. In carbon isotope curve, one negative shift is identified in the gray shale member and a positive isotopic excursion is detected in the coral algal limestone(CAL).The observed positive isotopic excursion in the lower part of the CAL correlates with OAE1 d and suggests the global nature of the late Albian OAE1 d in the Cauvery Basin.

关键词：稳定同位素岩相学盆地印度蕴涵碳酸盐岩氧同位素偏移检测

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Evaluation of hydrogeochemical characteristics and the impact of weathering in seepage water collected within the sedimentary formation

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Acta Geochimica 2017年第1期36卷 44-51页

作者： M.V.Prasanna r.nagarajan S.Chidambaram A.Anand Kumar C.Thivya Department of Applied Geology Faculty of Engineering and ScienceCurtin University Sarawak Department of Earth Sciences Annamalai University Department of Geology University of Madras

A study was conducted by collecting eight seepage water samples that drain through the sedimentary rocks, mainly sandstone and shale, to evaluate the hydro- geochemical characteristics. The collected samples were analyzed for physico-chemical parameters using standard procedures. Three water types were identified in the Piper plot and the hydrogeochemical evolution starts from a Ca- C1 facies （type 1） via mixed Ca-Mg-C1 and Ca-Na-HCO3 facies （type 2） to Na-C1 facies （type 3）. Increasing trend of electrical conductivity （EC） values were observed from type 1 water to type 3 water. Lower ionic concentrations with an average EC value of 35.7 kts/cm in Ca-C1 facies indicate the recharge water by monsoonal rainfall, and ion exchange/weathering process is reflected in the mixing zone. Higher ionic concentration with an average EC value of 399 kts/cm is noted in Na-C1 facies, which indicates the ion exchange during water-rock interaction. Higher log pCO2 values are also found in this facies, revealing the longer residence time of seepage water in the rock matrix, which release more ions into the water. The relative mobility of elements during weathering suggest that the order of mobility in both sandstone and shale is Na 〉 Ca 〉 Mg 〉 K. It was observed that thehydrogeochemistry of seepage water is mainly controlled by the bedrock geology.

关键词： Hydrogeochemistry Seepage water Water rock interaction Weathering Mobility of elements

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Hydrocarbon reserves of the South China Sea:Implications for regional energy security

Energy Geoscience

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Energy Geoscience 2020年第1期1卷 1-7页

作者： Mu ramkumar M.Santosh Manoj J.Mathew David Menier r.nagarajan Benjamin Sautter Department of Geology Periyar UniversitySalem636011India School of Earth Sciences and resources China University of Geosciences Beijing29 Xueyuan RoadBeijing100083China Department of Earth Sciences University of AdelaideSA5005Australia Shale Gas research Group Institute of Hydrocarbon RecoveryUniversiti Teknologi PETRONAS32610Seri IskandarMalaysia Laboratoire Geosciences Ocean(LGO) GMGL UMR CNRS 6538Universite de Bretagne Sud56017 Vannes CedexFrance Department of Applied Geology Curtin University SarawakMalaysia Department of Geosciences Universiti Teknologi PETRONAS32610Seri IskandarMalaysia

The countries such as China,Vietnam,Philippines,Malaysia,Indonesia and Brunei that border South China Sea region have immense stakes in exploring and exploiting the natural resources of the region including *** than the hydrocarbon reserves,the South China Sea is home to World’s high-networth trade route that brings the interests of non-geographic entities to this ***,the purported reserves of hydrocarbon in the region are in the orders of Persian Gulf but are not yet properly explored and the reserves recovered owing to territorial and non-claimant stakeholder’s influences/*** paper is a synopsis of information on the hydrocarbon reserves of the South China Sea region,and evaluates the territorial and extra-territorial interests in the light of energy security and equitable development and utilization of natural resources from a geological *** also suggest several measures for future consideration and implementation.

关键词： Energy security South China Sea Hydrocarbon-flashpoint Exploration Marine resources

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Episodic dolomitization of Paleozoic limestones in the Kinta Valley,Malaysia:Implications on porosity evolution and reservoir properties

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Energy Geoscience 2021年第4期2卷 298-307页

作者： Poon Xin Hui Mu.ramkumar r.nagarajan Manoj J.Mathew T.F.Ng South East Asia Carbonate research Laboratory(SEACarL) Universiti Teknologi PETRONASBandar Seri Iskandar31750TronohPerakMalaysia Department of Geology Periyar University636011SalemIndia Department of Applied Geology Curtin UniversityMalaysia98009MiriSarawakMalaysia Shale Gas research Group Institute of Hydrocarbon RecoveryUniversiti Teknologi PETRONAS31750TronohPerakMalaysia Department of Geology University of MalayaKuala LumpurMalaysia

Carbonates undergo a variety of physical,mineralogical,chemical changes during depositional and postdepositional stages that are of interest to exploration geologists and *** over,about 60%of hydrocarbon reserves occur in carbonates with the dominant proportion associated with dolomitic reservoirs,in particular fault-associated dolomites which appear to be proven hydrocarbon *** as the critical diagenetic process thus plays an important role in determining reservoir characteristics and in designing exploration *** buried Paleozoic dolomites exhibit relatively higher porosity than their counterparts,Paleozoic ***-associated dolomites are usually targets of hydrocarbon exploration due to their good reservoir *** heterogeneity in carbonate reservoirs due to varied porosity types and distribution makes reservoir characterization a daunting ***,the key elements that control porosity development and evolution in these dolomites remain *** the influence of multiphase dolomitization,associated diagenetic events,hydrothermal alteration and their causative thermo-tectonic events on porosity evolution and reservoir quality is essential to understanding the critical processes and controlling factors that result in diverse impacts on reservoir *** this paper,an attempt is made to characterize dolomitization in homogeneous carbonate mud and its relationship with porosity evolution and reservoir *** the field,six facies types excluding host limestone are recognized,which are in turn characterized into seven petrographically recognizable phases,namely the host limestone,early replacement dolomite,sucrosic dolomite,metamorphosed dolomite,late replacement dolomite,brecciated limestone and dolomite and late stage *** analyses reveal the dominance of stoichiometric dolomites,followed by calcareous dolomites and magnesium *** all the field-based f

关键词： Dolomitization Porosity evolution Paleozoic Kinta Valley Malaysia

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应用Mr成像确定在机器人辅助腹腔镜前列腺切除术中神经血管束的保留

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国际医学放射学杂志 2012年第3期 271-272页

作者： T.D.McClure D.J.A.Margolis r.E.reiter J.W.Sayre M.A.Thomas r.nagarajan 张华 Department of radiology David Geffen School of Medicine at UCLA200 Medical Plaza

目的确定术前直肠内线圈MrI的表现是否影响机器人辅助性腹腔镜前列腺切除术(rALP)中神经血管束的保留和手术切缘的范围。材料与方法本研究符合HIPAA,经伦理审查委员会批准,免除病人知情同意书。在2004年1月—2008年4月间有104例经活检... 详细信息

目的确定术前直肠内线圈MrI的表现是否影响机器人辅助性腹腔镜前列腺切除术(rALP)中神经血管束的保留和手术切缘的范围。材料与方法本研究符合HIPAA,经伦理审查委员会批准,免除病人知情同意书。在2004年1月—2008年4月间有104例经活检证实为前列腺癌的男性

关键词：血管束腹腔镜前列腺切除术手术计划 Mr 神经

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removal notice to“Hydrocarbon reserves of the south China sea:Implications for regional energy security”[Energy Geosci.1/1-2(2020)1-7]

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Energy Geoscience 2020年第1期1卷 I0002-I0002页

作者： Mu ramkumar M.Santosh Manoj J.Mathew David Menier r.nagarajan Benjamin Sautter Department of Geology Periyar UniversitySalem636011India School of Earth Sciences and resources China University of Geosciences Beijing29 Xueyuan RoadBeijing100083China Department of Earth Sciences University of AdelaideSA5005Australia Shale Gas research Group Institute of Hydrocarbon RecoveryUniversiti Teknologi PETRONAS32610Seri IskandarMalaysia Laboratoire Geosciences Ocean(LGO) GMGL UMR CNRS 6538Universite de Bretagne Sud56017Vannes CedexFrance Department of Applied Geology Curtin University SarawakMalaysia Department of Geosciences Universiti Teknologi PETRONAS32610Seri IskandarMalaysia

Available onlineThis article has been removed:please see Elsevier Policy on Article Withdrawal(https://***/about/our-business/policies/article-withdrawal).This article has been removed at the request of all the Author... 详细信息

关键词： removed Hydrocarbon please

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DFT investigation of NH3 gas interactions on TeO2 nanostructures

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Progress in Natural Science:Materials International 2016年第2期26卷 129-138页

作者： V.nagarajan r.Chandiramouli School of Electrical & Electronics Engineering SASTRA University

The structural, electronic and adsorption properties of NH3on pristine, Sn and F substituted TeO2nanostructures were investigated using density functional theory with B3LYP/Lan L2 DZ basis set. The electronic properties of pristine, Sn and F incorporated TeO2nanostructures were explained with ionization potential, HOMO–LUMO gap and electron af fi nity. The dipole moment and point group of rutile TeO2nanostructures were also reported. The structural stability of pristine, Sn and F substituted TeO2nanostructures were investigated in terms of formation energy. The adsorption properties of NH3 on TeO2were studied and the proper adsorption sites of NH3on TeO2materials were identi fi ed and discussed with the suitable parameters such as adsorption energy, HOMO–LUMO gap, Mulliken population analysis and average energy gap variation. The results show that the substitution of fl uorine in TeO2nanostructure enhances NH3 adsorption properties in mixed gas environment.

关键词： TeO2 Gas sensing Adsorption Mulliken charge Dipole moment Energy gap

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Optical absorption of Tl^+ ions in KBr_(1-x)I_x:TlI mixed crystals

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Nuclear Science and Techniques 2009年第4期20卷 208-218页

作者： Eswaran P ravisankar r.nagarajan S Department of Physics SMK Fomra Institute of Technology Department of Physics Government Arts CollegeThiruvannamalai Department of Physics Pondicherry Engineering College

Optical absorption spectra of the mixed crystals of KBr1-xIx:Tl+ crystals studied at room temperature are *** absorption spectra indicated the appearance of additional bands on the low energy side of the Characteristic A,B and C absorption bands of KBr:Tl+ single crystals with increasing iodine *** with earlier reports,the additional bands were attributed to the complex Tl+centers in the mixed configuration surrounded by Br-and I-ions as nearest *** absorption spectra of gamma irradiated mixed crystals showed F band,which shifts towards low energy side with the composition of iodine ions in the mixed crystals.

关键词：能级核技术光谱吸收碘离子

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