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Geochemical Analysis of Albian-Maastrichtian Formations in the Offshore Basin of the Abidjan Margin: Rock-Eval Pyrolysis Study

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Open Journal of Geology 2024年第8期14卷 805-822页

作者： N’Guessan Donald Ahoure Blandine Akissi Egoran Guy Richard N’Dri Kouadio Zokagon Sylvain Sehi Emmanuelle Laure oura Zéli Bruno Digbehi UFR of Sciences and Technologies Alassane Ouattara Bouak Laboratory of Plant Biology and Earth Sciences Bouak Cte dIvoire UFR Marine Sciences San Pedro University San Pedro Cte dIvoire PETROCI Geochimistry Department at the Center for Analysis and Research Abidjan Cte dIvoire UFR/STRM Felix Houphout Boigny University of Abidjan Abidjan Cte dIvoire

The Albian-Maastrichtian interval of the Ivorian sedimentary basin has been the subject of numerous sedimentological, biostratigraphic, and geophysical studies. However, its geochemical characteristics remain relatively unexplored. This study aims to determine the oil potential and the nature of the organic matter it contains. It focuses on the geochemical analysis (physicochemical method) of two oil wells located in the offshore sedimentary basin of Côte d’Ivoire, specifically in the Abidjan margin. A total of 154 cuttings samples from wells TMH-1X and TMH-2X were analyzed to determine their oil potential and the nature of the organic matter (OM) they contain. The analyses were performed using Rock-Eval pyrolysis, a method that characterizes the amount of hydrocarbons generated by the organic matter present in the rocks. The key parameters measured include Total Organic Carbon (TOC), Hydrogen Index (HI), oil potential (S2), and maximum pyrolysis temperature (Tmax). These parameters are used to assess the amount of organic matter, its thermal maturity, and its potential to generate hydrocarbons in the studied wells. The results show significant variations between different stratigraphic levels. In well TMH-1X, the Cenomanian and Campanian intervals stand out with very good quantities of organic matter (OM) with good oil potential, although often immature. In contrast, other stages such as the Albian and Turonian contain organic matter in moderate to low quantities, often immature and of continental type, which limits their capacity to generate hydrocarbons. In well TMH-2X, a similar trend is observed. Despite an abundance of organic matter, the oil potential remains low in most of the studied stages. The organic matter is primarily of type III (continental origin) and thermally immature, indicating a low potential for hydrocarbon generation. The study reveals that, although some intervals exhibit high-quality organic matter, the majority of the samples show insuffic

关键词： Geochemistry Rock-Eval Pyrolysis Upper Senonian Petroleum Potential Côte d’Ivoire

Study of Inner-Shell Excitation and Relaxation Processes in Atomic and Ionic Neon by Means of Soft X-Ray Spectroscopy

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Plasma Science and Technology 2010年第3期12卷 353-360页

作者： M.oura RIKEN SPring-8 Center 1-1-1 KoutoSayo-choSayo-gun

By using soft X-ray spectroscopy, we investigate the inner-shell excitation and relaxation processes in atomic and ionic neon targets. Resonant X-ray emission spectroscopy was applied to neutral neon atom in the regions of the [1s]np （n = 3, 4,…, ε） excited states and [1s2p]3pmp （m = 3,4） doubly excited states to obtain the spectroscopic information on the [2p]np and [2p^2]3prnp final electronic states, where square brackets indicate hole states. The energy levels of the [2p^2]3prnp （m = 3,4） electronic states were spectroscopically measured for the first time. As for the ionic neon target, on the other hand, the photoion yield spectroscopy was adopted to survey the 1s→ np （n = 2, 3） resonant excitation and subsequent Auger decay processes for Ne^＋ target-ions. The observed Ne^2＋ photoion yield spectrum is successflllly explained by the theoretical calculations based on the nmlticonfiguration Dirac-Fock method

关键词： neon photoexcitation soft X-ray emission spectroscopy merged-beam method multi-configuration Dirac-Fock (MCDF) calculation

A Probable Connection between a Bitumen Sample from the Western Niger Delta and Isan Well Sample from the Lower Cretaceous (Neocomian) Shale

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Open Journal of Geology 2022年第12期12卷 1081-1092页

作者： Selegha Abrakasa Koffi Eugene Kouadio Franck-Hilaire Essiagne Emma Laure oura Department of Geology University of Port Harcourt Rivers State Nigeria Institut National Polytechnique Felix Houphouë t-Boigny Yamoussoukro C&#244 te d’Ivoire Civil Engineering Geoscience and Geographic Sciences Laboratory Yamoussoukro Cote d’Ivoire Center of Analysis and Research PETROCI Abidjan Cote d’Ivoire

An earlier study of GC-MS analysis on bitumen samples from the Agbabu area in Western Niger Delta showed the significant presence of gammacerane and no Oleanane and is suggested to be generated from the Lower Cretaceous (Neocomian) source rock, however, twelve core samples were obtained from the geological survey of Nigeria for both optical geochemical and biomarker analysis, two of the samples from Isan-9 well indicated the presence of Botryococcus braunii a freshwater alga which is characteristic of a lacustrine lake type environment. The extracts from the same core showed m/z = 191 chromatogram with the significant presence of gammacerane which is diagnostic for stratified water columns and characterizes a typical lake environment. However, the m/z = 191 chromatogram also shows the presence of Oleanane which is diagnostic for vascular plant materials, this doesn’t corroborate with that of the Ise-2 well. The Isan-9 well source rock is suggested to have occurred due to the evolving structural geology of the continental shelf after the onset of the rifting, whereby the dominant lake-type environment in the Early Cretaceous was accompanied by a sediment fill of continental runoffs containing vascular plant materials. This implies that an ancient lacustrine lake system was gradually modified as a result of sedimentary infill. And that the bitumen is sourced from the lower Cretaceous Neocomian source rocks.

关键词： Amorphous Botryococcus Braunii Bitumen Gammacerane Neocomian Niger Delta Basin Oleanane

纸尿裤芯层吸收液体的速度与漩涡时间相关吗？

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生活用纸 2015年第3期15卷 71-74页

作者： Katarzyna Dobrosielska—oura 巴斯夫欧洲公司

漩涡时间[即烧杯中2g高吸收性树脂（SAP）将搅动的50g液体（09％盐水溶液）变成凝胶所需的时间]是经常被用来确定SAP之间差别的方法，而一种流行的观点是漩涡时间越短，液体吸收的速度越快。但是，如果没有准确理解漩涡时间的定义以及... 详细信息

漩涡时间[即烧杯中2g高吸收性树脂（SAP）将搅动的50g液体（09％盐水溶液）变成凝胶所需的时间]是经常被用来确定SAP之间差别的方法，而一种流行的观点是漩涡时间越短，液体吸收的速度越快。但是，如果没有准确理解漩涡时间的定义以及其与纸尿裤的吸收速度的相关性，可能会造成很大误解。

关键词：高吸收性树脂时间相关液体吸收吸收速度纸尿裤漩涡芯层盐水溶液

应用高效液相色谱从人参皂甙中分离人参甙-Rb1,-Rb2,-Rc,-Rd,-Re,-Rg1

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现代药物与临床 1981年第4期 48-49+44页

作者： oura H 张小青

用高效液相色谱法从粗皂甙中分离了人参皂甙的主要成分人参皂甙-Rb1,-Rb2,-Rc,-Rd,-Re,-Rg1。首先以硅胶进行 HPLC制备分离,然后用碳水化物为填料的分析柱进行HPLC半制备层析,这个方法使人参皂甙分离时间缩短。此外还用碳水化物分析柱... 详细信息

用高效液相色谱法从粗皂甙中分离了人参皂甙的主要成分人参皂甙-Rb1,-Rb2,-Rc,-Rd,-Re,-Rg1。首先以硅胶进行 HPLC制备分离,然后用碳水化物为填料的分析柱进行HPLC半制备层析,这个方法使人参皂甙分离时间缩短。此外还用碳水化物分析柱进行人参皂甙的分析,对人参皂甙的

关键词：人参 Rd Rg1 补气药 Rc Rb2 Re

LSHELLELECTRONPOPULATIONSOF95MeVArIONSINPASSINGTHROUGHTHICKSOLIDTARGETS

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Journal of Shanghai Jiaotong university(Science) 1996年第1期1卷 56-59页

作者： Ya-Ming Zou Y. Awaya T. Kambara Y. Kanai M. oura Y. Nakai K. Ando

ＬＳＨＥＬＬＥＬＥＣＴＲＯＮＰＯＰＵＬＡＴＩＯＮＳＯＦ９５ＭｅＶＡｒＩＯＮＳＩＮＰＡＳＳＩＮＧＴＨＲＯＵＧＨＴＨＩＣＫＳＯＬＩＤＴＡＲＧＥＴＳＺｏｕＹａｍｉｎｇ（ＡｐｐｌｉｅｄＰｈｙｓｉｃｓＤｅｐａｒｔｍｅｎｔ，Ｓｈ... 详细信息

ＬＳＨＥＬＬＥＬＥＣＴＲＯＮＰＯＰＵＬＡＴＩＯＮＳＯＦ９５ＭｅＶＡｒＩＯＮＳＩＮＰＡＳＳＩＮＧＴＨＲＯＵＧＨＴＨＩＣＫＳＯＬＩＤＴＡＲＧＥＴＳＺｏｕＹａｍｉｎｇ（ＡｐｐｌｉｅｄＰｈｙｓｉｃｓＤｅｐａｒｔｍｅｎｔ，ＳｈａｎｇｈａｉＪｉａｏｔｏｎｇＵｎｉ...

关键词： shell electron Ar ions solid targets fast heavy ions electron populations

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非洲猪瘟

国外畜牧学（猪与禽） 2015年第3期35卷 1-3页

作者：潘余乐何闪 Chris oura 江西农业大学动物科学与技术学院

非洲猪瘟(African Swine Fever,ASF)是猪的一种高度传染出血性疾病,能够产生大量类似于古典猪瘟的临床症状和器官损伤。在许多非洲国家和地中海岛、撒丁岛,它是一种对经济会有严重影响的动物地方流行性疾病。2007年6月,ASF首次在高加索... 详细信息

非洲猪瘟(African Swine Fever,ASF)是猪的一种高度传染出血性疾病,能够产生大量类似于古典猪瘟的临床症状和器官损伤。在许多非洲国家和地中海岛、撒丁岛,它是一种对经济会有严重影响的动物地方流行性疾病。2007年6月,ASF首次在高加索地区的格鲁吉亚被发现。自从其传入格鲁吉亚以来,非洲猪瘟病毒(African Swine Fever Virus,ASFV)已迅速蔓延到俄罗斯西部和南部的大部分地区,目前(2013年)它正在家猪和野猪群中广泛传播。该病毒已蔓延至欧洲的边界,2013年,非洲猪瘟在乌克兰和白俄罗斯出现,正危及东欧现有的大量猪群。

关键词：非洲猪瘟 African 高度传染 Swine 古典猪瘟撒丁岛器官损伤 Fever 病毒基因组临床症状

激光束直接照射球面石英晶片引起的热-频特性

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宇航计测技术 1984年第S1期 22-28页

作者： Nobunori oura Naimu Kuramochi 杨容芳

石英晶片的振荡频率特性是在把激光束作为一种探试器照射其各主要面的不同点时进行观测的。这种频率特性是各个切角所特有的,并且与几何形状和电极或支架的类型无关。 AT切晶片有三种部位显示出不同的热频特性。当激光器的照射功率相同... 详细信息

石英晶片的振荡频率特性是在把激光束作为一种探试器照射其各主要面的不同点时进行观测的。这种频率特性是各个切角所特有的,并且与几何形状和电极或支架的类型无关。 AT切晶片有三种部位显示出不同的热频特性。当激光器的照射功率相同时,IT切和SC切晶片的频率漂移总量约为AT切晶片频率漂移总量的1/5到1/10。这些结果使我们联想起可以通过使结构及电极对红外线的反射系数最佳来补偿晶体元件的热频瞬变。

关键词：晶片热冲击激光束电极结构频率偏移 AT

Distal Sensory Polyneuropathy among HIV Patients in Libreville in Gabon

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Neuroscience & Medicine 2015年第3期6卷 84-89页

作者： Kouna-Ndouongo Philomène Adoukonou Thierry oura Landry Ibole James Assengone-Zeh Yvonne Moubeka Mounguengui Martine Mouangue Minso Gertrude Service de Neurologie Centre Hospitalier Universitaire de Libreville Libreville Gabon Unité d’Enseignement et de Recherche de Neurologie Faculté de Médecine Université de Parakou Parakou Benin Hôpital d’Instruction des Armées Omar Bongo Ondimba Service de Neurologie Libreville Gabon

Distal sensory polyneuropathy (DSP) was more frequent among Human Immunodeficiency Virus (HIV) patients. The reliable tool for its diagnosis is not available everywhere in sub-Saharan Africa. We aimed to estimate the frequency of DSP among HIV patients in Libreville. We’ve conducted a cross-sectional study including all consecutives HIV-patients admitted to the HIV clinic in the University Teaching Hospital of Libreville (Gabon) between 1 May and 31 July 2014. All patients underwent a full neurological examination doing by two neurologists. The diagnosis of DSP was based on Brief Peripheral Neuropathy Screen (BPNS). We also collected the data concerning past medical history, the use of neurotoxic drug, history of disease and data of High Active Antiretroviral Therapy (HAART). The logistic regression was used to study the factors associated with DSP. They were 620 patients aged from 17 to 74 years with the mean age of 42.1 years ± 11.0 years and 570 (91.9%) were on HAART. The mean duration of disease was 57.6 ± 42.5 months. Among the 620 patients 170 fulfilled criteria for DSP, and the overall frequency of DSP was 27.4%. The associated factors in univariate analysis were the age, the occupation, the use of HAART, the HAART option, the stage of the disease, opportunistic disease, alcohol consumption, exposure to isoniazid, diabetes mellitus and the modes of contamination. But in multivariate analysis the associated factors were the stage of disease OR 2.7 [1.2 - 3.7], diabetes mellitus OR 2.4 [1.4 - 5.8] and the use of D4T in HAART OR 1.9 [1.1 - 4.9]. The main symptoms among the patients were burning feet (47.6%), the tingling (40.0%), numbness (27.6%), alteration of ankle reflex (87.6%) and alteration of vibration sensation (27.6%). The DSP was more frequent among HIV patients and could be explained by the duration of the disease, the association with metabolic disease and the use of D4T.

关键词： Distal Sensory Polyneuropathy HIV HAART Epidemiology Sub-Saharan Africa Frequency