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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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India at crossroads for energy

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Geoscience Frontiers 2021年第6期12卷 356-360页

作者： mu ramkumar M.Santosh Manoj J.Mathew Numair A.Siddiqui Department of Geology Periyar UniversitySalem636011India School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing100083China Department of Earth Science University of AdelaideAdelaideSAAustralia Shale Gas Research Group Institute of Hydrocarbon RecoveryUniversiti Teknologi PETRONAS32610Seri IskandarMalaysia Department of Geosciences Universiti Teknologi PetronasTronohMalaysia

As one of the fastest growing economies and further larger consumer of energy in the world, there has been a paradigm shift in India’s energy demand. Here we evaluate the growth of Indian economy its, diversification of agriculture-based economy to industrial production, service and digital-technology based economy and deepening of income sources, although the dependence on foreign sources for energy demands has not markedly *** situation has placed India at the crossroads for energy sufficiency, especially under the highly fluid and changing geopolitical, strategic, environmental and economic scenarios of the World order. We attempt to understand the issue from geological perspective and address some of the impediments.

关键词： Economy Energy sources Technology Geological impediments India

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High Ba-Sr adakitic charnockite suite from the Nagercoil Block,southern India:Vestiges of Paleoproterozoic arc and implications for Columbia to Gondwana

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Geoscience Frontiers 2021年第3期12卷 577-596页

作者： Pin Gao M.Santosh Cheng-Xue Yang Sanghoon Kwon mu.ramkumar School of Earth Sciences and Resources China University of Geosciences(Beijing)29 Xueyuan RoadBeijing 100083PR China Department of Earth Sciences University of AdelaideAdelaideSA 5005Australia Department of Earth Sciences Yonsei UniversitySeoul 03772Republic of Korea Department of Geology Periyar UniversitySalem 636011India

The Nagercoil block is the southernmost crustal segment of the Southern Granulite Terrane(SGT)in India and is mainly composed of charnockitic rocks and felsic gneisses(charnockite suite).In this study,we present petrologic,geochemical,zircon U-Pb,REE,and Hf isotopic studies on the charnockites and leucogneiss from the Nagercoil *** on field investigations and petrologic studies,the charnockites can be divided into garnet-bearing and garnet-absent anhydrous granulite facies rocks with *** charnockites and leucogneiss show transition from adakites to non-adakitic magmatic rocks,with enrichment in LREEs(light rare earth elements)and LILEs(large ion lithophile elements),and depletion in HREEs(heavy rare earth elements)and HFSEs(high field strength elements).Some of the charnockites and the leucogneiss show typical HSA(high silica adakite)characters,(high SiO_(2),Al_(2)O_(3),Ba-Sr,La/Yb,and Sr/Y).The HSA is considered to have formed from the interaction of slab derived melts and peridotitic mantle *** high Ba-Sr features were possibly inherited from subducted oceanic crust melting under high thermal gradient during *** magmas were underplated and subjected to fractional *** grains from the charnockite and leucogneiss show zoned magmatic cores surrounded by structureless metamorphic *** zircon grains from the charnockites show ages ranging from 1983±8.8 Ma to 2046±14 Ma,and the metamorphic domains show an age range of 502±14 Ma to 547±8.7 *** from the leucogneiss yielded magmatic and metamorphic ages of 1860±20 Ma and 575.6±8.8 *** charnockites and leucogneiss show two prominent age peaks at 1987 Ma and 568 *** REE data of the zircon grains show LREE depletion and HREE enrichment,with the metamorphic grains showing more depletion in *** Hf isotopic data of the magmatic cores of zircon grains from the charnockite yieldedε_(Hf)(t)values from-1.17 to 0.46 with T_(DM)and T_(DM)~C and age

关键词： Charnockite Adakitic rocks High Ba-Sr granitoids Geochemistry and zircon geochronology Nagercoil block Columbia and Gondwana supercontinents

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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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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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High resolution facies architecture and digital outcrop modeling of the Sandakan formation sandstone reservoir, Borneo:Implications for reservoir characterization and flow simulation

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Geoscience Frontiers 2019年第3期10卷 957-971页

作者： Numair A.Siddiqui mu.ramkumar Abdul Hadi A.Rahman Manoj J.Mathew M.Santosh Chow W.Sum David Menier Department of Petroleum Geosciences Universiti Teknologi PETRONAS Department of Geology Periyar University Institute of Oceanography and Environment Universiti Malaysia Terengganu Department of Earth Sciences University of Adelaide School of Earth Sciences and Resources China University of Geosciences Beijing Laboratoire Géosciences Océan UMR CNRS 6538Campus de Tohannic

Advances in photogrammetry have eased the acquisition of high-resolution digital information from outcrops, enabling faster, non-destructive data capturing and improved reservoir modeling. Geocellular models for flow dynamics with in the virtual outcrop in siliciclastic deposits at different sets of sandstone facies architecture remain, however, a challenge. Digital maps of bedding, lithological contrast, spatial-temporal variations of bedding and permeability characteristics make it more easy to understand flow tortuosity in a particular architecture. An ability to precisely model these properties can improve reservoir characterization and flow modeling at different scales. Here we demonstrate the construction of realistic 2 D sandstone facies based models for a pragmatic simulation of flow dynamics using a combination of digital point clouds dataset acquired from LiDAR and field investigation of the Sandakan Formation, Sabah, ***, we present methods for enhancing the accuracy of outcrop digital datasets for producing high resolution flow simulation. A well-exposed outcrop from the Sandakan Formation, Sabah, northwest Borneo having a lateral extent of 750 m was chosen in order to implement our research approach. Sandstone facies and its connectivity are well constrained by outcrop observations, data from air-permeability measurements, bilinear interpolation of permeability, grid construction and water vector analysis for flow *** proportions were then enumerated in terms of static digital outcrop model(DOM) and facies model based on sandstone facies bedding characteristics. Flow simulation of water vector analysis through each of the four sandstone facies types show persistent spatial correlation of permeability that align with either cross-bedded orientation or straight with more dispersion high quality sandstone(porosity 21.25%-41.2%and permeability 1265.20-5986.25 mD) and moderate quality sandstone(porosity 10.44%-28.75% and permeabili

关键词： Siliciclastic sandstone facies Connectivity Heterogeneity Digital outcrop model Flow dynamics

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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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Hierarchical delineation and multivariate statistical discrimination of chemozones of the Cauvery Basin,south India:Implications on spatio-temporal scales of stratigraphic correlation

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Petroleum Science 2010年第4期7卷 435-447页

作者： ramkumar mu. BERNER Z. STBEN D. Department of Geology Periyar University Institute of Palaeoenvironment University of Erlangen-Nuernberg Institute of Mineralogy and Geochemistry University of Karlsruhe

Success in locating oil pools in the Cauvery Basin,south India had been found to be based on the ability to delineate precisely the stratigraphic traps resulting from frequent sea level ***,recognition and delineation of them in terms of depositional units through conventional stratigraphic methods have been elusive owing to the limitations of such methods and lack of unified stratigraphic markers that could be traced at regional and basinal *** paper attempts to recognize depositional units in terms of chemozones,chronologic and lithostratigraphic units by assigning distinct geochemical *** signatures were assigned through hierarchical delineation and discriminant function *** is observed that individual depositional units could be recognized statistically with whole-rock geochemical *** strata under study show two second order chemozones comprising six major chemozones that in turn correspond to third order sea level cycles and minor chemozones at the scale of fourth order and/or further shorter sea level *** geochemical signatures showed 100% distinctness between sample populations categorized according to chronostratigraphy and *** durations of these stratigraphic units range from 18 million years to less than a million years and indicate distinct geochemical compositional change at different time *** implication and also due to the close correspondence between sea level variations reported from this basin and global sea level cycles,it is suggested that recognition and correlation of individual depositional units with distal counterparts could be made *** of these results is that stratigraphic units,at varying scales either temporally or spatially,could be assigned with unique geochemical signature,with which accurate prediction and correlation of similar units elsewhere is possible with measurable accuracy.

关键词： Chemostratigraphy statistical discrimination petroleum exploration stratigraphic correlation

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