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oil-source correlation and Paleozoic source rock analysis in the Siwa Basin,Western Desert:Insights from well-logs,Rock-Eval pyrolysis,and biomarker data

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Energy Geoscience 2024年第3期5卷 313-327页

作者： Mohamed I.Abdel-Fattah Mohamed Reda Mohamed Fathy Diaa A.Saadawi Fahad Alshehri Mohamed S.Ahmed Petroleum Geosciences and Remote Sensing Program Department of Applied Physics and AstronomyCollege of SciencesUniversity of SharjahSharjah27272United Arab Emirates Geology Department Faculty of ScienceSuez Canal UniversityIsmailiaEgypt Faculty of Science Geology DepartmentAl-Azhar UniversityP.O.Box 11884Nasr CityCairoEgypt Abdullah Alrushaid Chair for Earth Science Remote Sensing Research Geology and Geophysics DepartmentCollege of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

Understanding the origins of potential source rocks and unraveling the intricate connections between reservoir oils and their source formations in the Siwa Basin(Western Desert,Egypt)necessitate a thorough oil-source correlation *** objective is achieved through a meticulous analysis of well-log responses,Rock-Eval pyrolysis,and biomarker *** analysis of Total Organic Carbon across 31 samples representing Paleozoic formations in the Siwa A-1X well reveals a spectrum of organic richness ranging from 0.17 wt%to 2.04 wt%,thereby highlighting diverse levels of organic content and the presence of both Type II and Type III *** of the fingerprint characteristics of eight samples from the well suggests that the Dhiffah Formation comprises a blend of terrestrial and marine organic ***,a significant contribution from more oxidized residual organic matter and gas-prone Type III kerogen is ***,the Desouky and Zeitoun formations exhibit mixed organic matter indicative of a transitional environment,and thus featuring a pronounced marine influence within a more reducing setting,which is associated with Type II *** analysis of five oil samples from different wells—SIWA L-1X,SIWA R-3X,SIWA D-1X,PTAH 5X,and PTAH 6X,it is evident that terrestrial organic matter,augmented by considerable marine input,was deposited in an oxidizing environment,and contains Type III *** scrutiny confirms the coexistence of mixed terrestrial organic matter within varying redox *** is the uniformity of identified kerogen Types II and III across all samples,known to have potential for hydrocarbon *** discovery presented in this paper unveils captivating prospects concerning the genesis of oil in the Jurassic Safa reservoir,suggesting potential links to Paleozoic sources or even originating from the Safa Member *** revelations mark a substantial advancement in understanding source

关键词： Biomarker data oil-source correlation Rock-Eval pyrolysis source rocks Siwa Basin

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Distribution and isotopic signature of 2-alkyl-1,3,4-trimethylbenzenes in the Lower Paleozoic source rocks and oils of Tarim Basin:Implications for the oil-source correlation

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Petroleum Science 2022年第6期19卷 2572-2582页

作者： Tao-Hua He Wen-Hao Li Shuang-Fang Lu Er-Qiang Yang Tao-Tao Jing Jun-Feng Ying Peng-Fei Zhu Xiu-Zhe Wang Wen-Qing Pan Zhong-Hong Chen Key Laboratory of oil and Gas Resources and Exploration Technology Yangtze UniversityWuhanHubei430100China School of Geosciences China University of Petroleum(East China)QingdaoShandong266580China Key Laboratory of Deep oil and Gas China University of Petroleum(East China)QingdaoShandong266580China Sanya Offshore oil&Gas Research Institute Northeast Petroleum UniversitySanyaHainan 572025China Petroleum Exploration&Production Research Institute Tarim Oilfield CompanyPetro ChinaKorlaXinjiang841000China

Series of 2-alkyl-1,3,4-trimethylbenzenes(ATMBs)were detected in most of crude oils and source rocks collected from various strata and locations of the Tarim *** appeared to have heavy carbon isotopic signatures(δ13C,up to~-16‰)compared to those hydrocarbons from oxygenic phototrophic organisms,indicating that the unequivocal source of green sulfur bacteria(GSB)and photic zone euxinia(PZE)existed in the original *** the high paleoproductivity,the PZE may have enhanced the preservation of organic matter,which triggered the formation of extremely organic-rich source rocks with TOC up to 29.8%for the Lower Cambrian Yuertus Formation(€1y).The coexistence of ATMBs and the diagnostic products from secondary alterations(e.g.,abundant 25-norhopanes,thiadiamondoids,and diamondoids)indicated a stronger ability of *** with the results of quantitatively de-convoluting mixed oil,the oil-source correlation based on ATMBs from a large number of Lower Paleozoic samples of the Tarim Basin suggested that the abundant deep crude oil resources co ntained a dominant contribution(>50%)from the€1y source ***,the ATMBs,as diagnostic biomarkers indicating unequivocal precursors under special habitat conditions,might provide important insights for the exploration of deep Lower Paleozoic crude oils in the Tarim Basin.

关键词： 2-alkyl-1,3,4-trimethylbenzenes Carbon isotopes Deep lower paleozoic crude oils Thiadiamondoid oil-source correlation Tarim Basin

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Effective source rock selection and oil–source correlation in the Western Slope of the northern Songliao Basin,China

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Petroleum Science 2021年第2期18卷 398-415页

作者： He Bi Peng Li Yun Jiang Jing-Jing Fan Xiao-Yue Chen Research Institute of Petroleum Exploration and Development PetroChinaBeijing100083China Petroleum Exploration and Production Research Institute SINOPECBeijing100083China China National oil and Gas Exploration and Development Co.Ltd. Beijing100034China

This study considers the Upper Cretaceous Qingshankou Formation,Yaojia Formation,and the first member of the Nenjiang Formation in the Western Slope of the northern Songliao *** mudstone with high abundances of organic matter of Gulong and Qijia sags are considered to be significant source rocks in the study *** evaluate their development characteristics,differences and effectiveness,geochemical parameters are ***-dimensional basin modeling and hydrocarbon evolution are also applied to discuss the effectiveness of source *** the biomarker characteristics,the source–source,oil–oil,and oil–source correlations are assessed and the sources of crude oils in different rock units are *** on the results,Gulong and Qijia source rocks have different organic matter primarily detrived from mixed sources and plankton,*** source rock has higher thermal evolution degree than Qijia source *** biomarker parameters of the source rocks are compared with 31 crude oil *** studied crude oils can be divided into two *** oil–source correlations show that group I oils from Qing II–III,Yao I,and Yao II–III members were probably derived from Gulong source rock and that only group II oils from Nen I member were derived from Qijia source rock.

关键词： Songliao basin Western slope source rock distinction Crude oils Biomarker oil-source correlation

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The Occurrence of Oleananes in the Beibuwan Basin and Its Application to the Study of Maturity and oil-source Rock correlation

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Acta Geologica Sinica(English Edition) 2008年第3期82卷 585-595页

作者： LI Meijun WANG Tieguan LIU Ju ZHANG Meizhu LU Hong MA Qinglin GAO Lihui State Key Laboratory of Petroleum Resource and Prospecting Earth Sciences and Geoinformatics School China University of Petroleum Beijing 102249 China Southern oil Exploration and Development Company PetroChina Guangzhou 510640 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510240 China

The oleanane parameter, i.e., OP （oleananes/（oleananes＋C30hopanes）） in the two sedimentary columns of the Beibuwan Basin, South China Sea, can be used to delimit the top of oil generation window, with Ro （/%） of 0.53 in Well M1 and 0.55 in Wells H1/Hd1/Hd2, respectively. Comparing with vitrinite reflectance （Ro/%）, the OP features a dynamic range and can indicate the oil generation window more precisely. By using OP and other geochemical indices, the oil-source correlation is also conducted. It suggests that the oils in wells M1 and M2 are derived from the source rocks in situ. The mudstone in Huachang uplift is not the main source rocks for oils in this area, The OP is also a useful oil-source correlation parameter in some Tertiary lacustrine basins.

关键词： oleanane parameter (OP) biomarker maturity oil-source correlation Fushan Depression

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Potential petroleum sources and exploration directions around the Manjar Sag in the Tarim Basin

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Science China Earth Sciences 2017年第2期60卷 235-245页

作者： JIN ZhiJun LIU QuanYou YUN JinBiao Tenger State Key Laboratory of Shale oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083 China Petroleum Exploration and Production Research Institute ofSINOPEC Beijing 100083 China

Since the discovery of the Tahe oilfield, it has been controversial on whether the main source rock is in the Cambrian or Middle-Upper Ordovician strata. In this paper, it is assumed that the crude oil from the Wells YM 2 and TD 2 was derived from the Middle-Upper Ordovician and Cambrian source rocks, respectively. We analyzed the biomarkers of the crude oil, asphalt-adsorbed hydrocarbon and saturated hydrocarbon in bitumen inclusions from the Lunnan and Hade areas in the North Uplift of the Tarim Basin. Results show that the ratios of tricyclic terpane C2~/C23 in the crude oil, asphalt-adsorbed hydrocarbon and saturated hydrocarbon in bitumen inclusions are less than 1.0, indicating that they might be from Upper Ordovician source rocks; the ratios of C28/（C27＋C28＋C29） steranes in the saturated hydrocarbon from reservoir bitumen and bitumen inclusions are higher than 25, suggesting that they might come from the Cambrian source rocks, however, the ratios of C28/（C27＋C28＋C29） steranes in oil from the North Uplift are less than 25, suggesting that they might be sourced from the Upper Ordovician source rocks. These findings demonstrate that the sources of crude oil in the Tarim Basin are complicated. The chemical composition and carbon isotopes of Ordovician reservoired oil in the Tarim Basin indicated that the crude oil in the North Uplift （including the Tahe oilfield） and Tazhong Depression was within mixture areas of crude oil from the Wells YM 2 and TD 2 as the end members of the Cambrian and Middle-Upper Ordovician sourced oils, respectively. This observation suggests that the crude oil in the Ordovician strata is a mixture of oils from the Cambrian and Ordovician source rocks, with increasing contribution from the Cambrian source rocks from the southern slope of the North Uplift to northern slope of the Central Uplift of the Tarim Basin. Considering the lithology and sedimentary facies data, the spatial distribution of the Cambrian, Middle-Lower Ordovician and Upp

关键词： Tarim Basin Marine source rock oil-source correlation Biomarker

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oil source and migration process in oblique transfer zone of Fushan Sag,northern South China Sea

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Journal of Central South University 2016年第3期23卷 654-668页

作者：王观宏王华甘华军时阳赵迎冬陈善斌 Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education(China University of Geosciences) Wuhan 430074China Faculty of Earth Resources China University of GeosciencesWuhan 430074China Exploration and Development Corporation PetroChinaGuangzhou 510000China

The oblique transfer zone in the Fushan Sag, a syndepositional dome sandwiched between the Bailian and Huangtong sub-sags, has been the most important exploration target. The major oil observation occurs in the E_2l_1^(L+M) and the E_2l_3~U. 46 oil and rock samples reveal that the oil in the transfer zone is mostly contributed by the Bailian sub-sag, though the source rock conditions, hydrocarbon generation and expulsion histories of the Bailian and Huangtong sub-sags are similar. The E_2l_3~U oil, characterized by high maturity, Pr/Ph ratio and oleanane/C_(30)-hopane ratio, shows a close genetic affinity with the E_2l_3~b source rocks, while the E_2l_1^(L+M) oil, characterized by lower maturity, Pr/Ph ratio and oleanane/C_(30)-hopane ratio, is suggested to be derived from the E_2l_(1+2)~b source rocks. The homogenization temperatures of aqueous fluid inclusions, taking the burial history of the reservoirs into account, reflect that the oil charge mainly occurred from mid-Miocene to Pliocene in the oblique transfer zone. The oil transporting passages include connected sand bodies, unconformities and faults in the Fushan Sag. Of these, the faults are the most complicated and significant. The faults differ sharply in the west area, the east area and the oblique transfer zone, resulting in different influence on the oil migration and accumulation. During the main hydrocarbon charge stage, the faults in the west area are characterized by bad vertical sealing and spatially dense distribution. As a result, the oil generated by the Huangtong source rocks is mostly lost along the faults during the vertical migration in the west area. This can be the mechanism proposed to explain the little contribution of the Huangtong source rocks to the oil in the oblique transfer zone. Eventually, an oil migration and accumulation model is built in the oblique transfer zone, which may provide theoretical and practical guides for the oil exploration.

关键词： oblique transfer zone oil-source correlation oil loss oil migration and accumulation model Fushan Sag

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Discovery of a new Proterozoic paleo-reservoir and its oil source in the Jianchang Sag,Yanliao Faulted-Depression Zone,North China

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Petroleum Science 2022年第5期19卷 1927-1938页

作者： Hong Xiao Mei-Jun Li Tie-Guan Wang Dong-Xia Chen Wu-Jiang Kang Yan-Shan Wang State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China College of Geosciences China University of PetroleumBeijing102249China Research Institute of Petroleum Exploration and Development Liaohe Oilfield CompanyPetroChinaPanjinLiaoning 124010China

The discovery of many Proterozoic primary oil and gas reservoirs around the world testifies that the Meso-Neoproterozoic petroleum is an energy resources realm worthy of *** paper firstly reports the occurrence of hydrocarbon accumulations in the Neoproterozoic Luotuoling Formation in the Jianchang Sag,the Yanliao Faulted-Depression *** observation shows that the lower sandstone member of the Luotuoling Formation contains yellow fluorescent liquid hydrocarbons,while the upper sandstone member is rich in solid *** analysis of the biomarkers and isotopic compositions reveals that the upper and lower reservoirs have different oil *** bitumen in the lower reservoir is rich in C_(19)-C_(20)tricyclic terpanes(TTs),13α(n-alkyl)-tricyclic terpanes and rearranged hopanes,but lacks gammacerane and steranes and depletes ^(13)C isotope(-33.4‰to-30.6‰).This is consistent with the properties of the Hongshuizhuang Formation source *** upper reservoir bitumen has C_(23)TT as the major peak among C_(19)-C_(23)TTs,lacks 13α(n-alkyl)-tricyclic terpanes,has a low abundance of rearranged hopanes,obvious distribution of gammacerane and steranes,and depletion of the^(13)C isotope;essentially the same as the Gaoyuzhuang Formation source *** discovery of oil seepage in the Luotuoling Formation of the Han-1 well is a promising indicator of the Precambrian oil and gas exploration potential of the Jianchang Sag.

关键词： Proterozoic paleo-reservoir Biomarkers Carbon isotope oil-source correlation Jianchang sag

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source and accumulation process of Jurassic biodegraded oil in the Eastern Junggar Basin,NW China

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Petroleum Science 2021年第4期18卷 1033-1046页

作者： Mao-Guo Hou Ming Zha Xiu-Jian Ding He Yin Bao-Li Bian Hai-Lei Liu Zhong-Fa Jiang School of Geosciences China University of PetroleumQingdaoShandong 266580China Research Institute of Exploration and Development Xinjiang Petroleum Administration BureauKaramay 834000China

Biodegradation usually obscures or even radically alters the original characteristics of oil *** mixing of oil from multiple sources makes each source difficult to *** the source of biodegraded oil from multiple sources has always been a hard nut to *** to this challenge,in this study-we carried out a comprehensive investigation of biodegradation impacts,oil-source correlation,and oil charging history to trace the source and reveal the mixing process of biodegraded oil in the Toutunhe Formation(J_(2)t)in the eastern Junggar Basin,NW *** oil of this area was biodegraded to different extent,consequently,many commonly used biomarker parameters(***/Ph,Pr/n C_(17))became less powerful for oil-source *** address this problem,the resistance of many biomarkers to biodegradation was analyzed,and those of high bio resistance were selected to generate a more reliable oil-source *** results revealed that biodegraded oil was a mixture of oil sourced from Lucaogou Formation(P_(2)l)and Xiaoquangou Formation(T_(2-3)xq).Core sample observation,microscopic fluorescent analysis and fluid inclusion analysis were combined to analyze comprehensively oil charging *** analysis of accumulation process exhibited that the existing oil in J_(2)t was a mixture originated from the P_(2)l and T_(2-3)xq source rocks in two separate charging stages when it underwent a complicated process of charging,biodegradation,recharging and mixing.

关键词： Biodegraded oil Mixed oil oil-source correlation oil accumulation process Junggar Basin

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Aromatic Hydrocarbons as Indicators of Origin and Maturation for Light oils from Panyu Lower Uplift in Pearl River Mouth Basin

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Journal of Earth Science 2009年第5期20卷 824-835页

作者：郭小文何生 Faculty of Earth Resources Key Laboratory of Tectonics and Petroleum Resources of the Ministry of EducationChina University of Geosciences

Aromatic fractions of six light oils and two source rock samples from Panyu（番禺） lower uplift of Pearl River Mouth basin were analyzed using GC-MS（gas chromatography-mass spectrometric） *** aromatic series of hydrocarbons detected such as biphenyls,naphthalenes,phenanthrenes,dibenzothiophenes（more than two hundred aromatic hydrocarbon compounds） were used to analyze the origin and maturity of the light *** study indicates that the distribution of aromatic hydrocarbon compounds in the light oils of wells L1 and P1 differs from those of wells P2,P3 and *** light oil samples from wells L1 and P1 contain more dibenzofuran and fluorence hydrocarbons and less naphthalene *** contents of fluorene,dibenzothiophene and dibenzofuran in the two groups of light oils also show their difference in sedimentary ***,the diversity of the relative distributions of biphenyl and naphthalene is apparent between the two groups of light *** mentioned above,the origin of the light oils from wells L1 and P1 varies from that of wells P2,P3 and *** to the result of oil-source correlation,the light oils from wells P2,P3 and P4 mainly originated from the source rocks in the Enping（恩平） ***,the light oils from wells L1 and P1 may have been derived from the lacustrine shales in the Wenchang（文昌） Formation or from the mixed source of the Wenchang Formation and the Enping *** maturity parameters of methylnaphthalenes,methylphenanthrenes and methyldibenzothiophenes from the aromatic hydrocarbons to the study of the maturity of light oils from Panyu lower uplift indicates that the maturity has reached the high mature stage.

关键词： light oil aromatic hydrocarbon oil-source correlation light oil maturity Pearl RiverMouth basin.

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Geochemical Characteristics and Accumulated Process of Heavy Crude oil of Chunguang oilfield in Junggar Basin, China

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Journal of Earth Science 2016年第5期27卷 846-855页

作者： Yuanfang Fan Lianfu Mei Hongjun Liu Key Laboratory of Tectonics and Petroleum Resources Ministry of Education China University of Geosciences School of Earth Sciences and Engineering Xi’an Shiyou University

Chunguang oilfield is a new focus of the exploration in Junnggar Basin with the heavy crude oil distributing in Jurassic, Cretaceous and Tertiary strata. Based on the analysis of the geochemistry and fluid inclusion in the reservoirs, the source, accumulated period and process of the heavy crude oil reservoir has been investigated. The results indicate that the heavy crude oil can be divided into three types based on the degradation and sources. The heavy crude oil was mainly derived from the Permian source rocks, and latterly mixed by the heavy crude oil generated by the Jurassic source rocks. The accumulated period of the heavy crude oil has two stages. One was ranged from Cretaceous to Paleogene and the heavy crude oil was sourced from Permian source rocks of the Shawan depression and latterly mixed by the heavy crude oil generated by the Jurassic source rocks. The second period was from Neogene to present and the heavy crude oil was mainly derived from the Jurassic source rocks. Combined with the geological evolution, the heavy crude oil accumulated process has been recovered.

关键词： oil-source correlation fluid inclusions accumulated stages accumulated process.

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