Investigation of the wide-range maturity indices for sedimentary organic matter

沉积物有机质宽范围成熟度指数研究

• 批准号: 10640439
• 负责人: SAMPEI Yoshikazu
• 金额: $ 2.43万
• 依托单位: SHIMANE UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640439/
• 关键词: pyrolysis gas chromatograph; pyrolyzed hydrocarbon; organic carbon content; methylphenanthrenes; methylbenzothiophenes; black shale; contact metamorphism; H; C比; 有機熟成度; 堆積盆の埋没史; 石油・天然ガス鉱床

1.Characterization of Methylphenanthrene with Methyldibenzothiophen as wide-range maturity indicator in mudrocks, Japan :Methylphenanthrene index (PFI), a wide-range maturation indicater, was characterized with methyldebenzothiophen for the Cretaceous-tertialy mudstones in Japan. Mudstones from Miocene Nanatani-Teradomari Formation (MITI Tomikura and Tojo) in Niigata Prefecture, Onnagawa Formation in Akita prefecture, Josoji Formation in Shimane Prefecture and Cretaceous-Tertiary Shimanto Group in Kochi Prefecture were investigated to know the variation of MPI and its relation to %Ro. For all rock samples, the MPI showed increase from 0.7 to 4.2 in the mature zone (%Ro=0.5-1.9) and decrease from 4.2 to 1.3 in the over-mature zone (%Ro=1.9-4.5). The upper slope in these trends was discussed by means of geochemical kinetics, suggesting that the MPI change depend on production of intermediate MPI and the methyl-shift from α-isomer to β-isomer.2.Geochemical kinetic parameters for isomeriza … More tion of Methylphenanthrene :To know the variation of MPI in the oil window, the geochemical dynamics of MPI change were examined by the heating experiment of Sarukawa crude oil from Onnagawa Formation with clay mineral (bentonite) and water in the heat/pressure-stable reactor at 300, 350, 370, 380, 400 and 450℃. The activation energy (E) and frequency factor (A) of the MPI change within the upper slope were obtained by the heating experiment as follows : E = 57.2 kcal/mol and A = 2.23 x 10^<12> s^<-1>. Based on the results, the relationship between MPI and maximum paleo-temperature was estimated for some basin.3.Contact metamorphism of Miocene Josoji black mudstones in Shimane Peninsula, southwest Japan :Compositional changes in organic matter by contact metamorphism were investigated for Miocene Josoji black mudstones in Shimane Peninsula. Three representative outcrops were selected, where the black mudstones have invaded by ryorite and andesite lava. Several rock samples were collected from the contact plane to about 30m distance. The ryorite supposed to have thermally influenced the mudstones more than the andesite. This is due to size of the intrusion. The ryorite decomposed organic matter to be less than 10%, but the andesite to be only about 70%.4.Compositional changes in organic matter artificially heated black mudstone from Miocene Josoji formation, southwest Japan :This study is a preliminary experimental work on decomposition of organic matter in sedimentary rocks. Compositional changes in the organic matter after heating blask mudstone from Miocene Josoji formation, Shimane peninsula were investigated. The mud rocks were heated in an oven at constant temperature. i. e. 200, 250, 300, 350, 400, 450, 500, 550 and 600℃, for 2 days. After the experiment of 60O℃, TOC (total organic carbon), TN (total nitrogen) and TS (total sulfur) decreased to 50%, 25% and 20% of the initial rocks, respectively. Pristane/Phytane ratio and CPI (carbon preference index) decreased from 4.3 to 0.3 and from 1.1 to 0.25, respectively. HI (hydrogen index) abnormally decreased from 43 to 1. Less

1.以甲基二苯并硫酚为广泛成熟度指示剂的甲基菲在泥岩中的表征日本白垩纪-三叠纪泥岩的甲基菲指数(PFI)是一种广泛的成熟度指示剂。通过对新泻县中新世那那谷-Teradomari组(MITI Tomikura和Tojo)、秋田县Onnagawa组、岛根县Josoji组和高知县白垩纪-第三系岛岛群泥岩的研究，了解MPI的变化及其与Ro的关系。在所有岩石样品中，成熟带(%Ro=0.5-1.9)的MPI从0.7增加到4.2，过成熟带(%Ro=1.9-4.5)的MPI从4.2下降到1.3。用地球化学动力学的方法讨论了这些趋势的上斜率，认为MPI的变化取决于中间体MPI的产生和从α-异构体到β-异构体的甲基转移。2.异构化…的地球化学动力学参数甲基菲的增加：为了了解石油窗口中甲基菲的变化，通过在热/压稳定反应器中对翁长川组沙鲁川原油与粘土矿物(膨润土)和水在300、350、370、380、400和450℃下的加热实验，研究了石油窗口中甲基菲的变化规律。通过加热实验得到上斜率范围内MPI变化的激活能(E)和频率因子(A)分别为：E=57.2kcal/mol和A=2.23×10~(-1)·lt；12~gt；S~(-1)3.岛根半岛中新世Josoji黑色泥岩接触变质作用：研究了岛根半岛中新世Josoji黑色泥岩接触变质作用对有机质成分的影响。选择了三个具有代表性的露头，黑色泥岩已被流纹岩和安山岩熔岩侵入。从接触面上采集了几个岩石样品，距离约30米。据推测，沸石对泥岩的热影响比安山岩更大。这是由于入侵的规模所致。流纹石对有机质的分解小于10%，而安山岩仅占70%左右。4.中新世日本西南部Josoji组人工加热黑色泥岩的有机质组成变化：本研究是沉积岩有机质分解的初步实验工作。研究了岛根半岛中新统Josoji组砂质泥岩加热后有机质组成的变化。泥岩在烤箱中恒温加热。即200、250、300、350、400、450、500、550和600℃，为期2天。经600O℃试验后，总有机碳、总氮和总硫分别降至原始岩石的50%、25%和20%。普里斯坦/植烷比和CPI(碳偏好指数)分别从4.3降至0.3和1.1降至0.25。HI(氢指数)从43异常下降到1。更少

项目成果

Ishihara, T., Ohira, H.and Tateishi, M.: "Fission-track ages of the Oriwatari Formation in the Shinjo Basin, Yamagata Prefecture, Northeast Japan"Journal of the Geological Society of Japan. 106. 905-908 (2000)

Ishihara, T.、Ohira, H. 和 Tateishi, M.：“日本东北部山形县新庄盆地 Oriwatari 地层的裂变径迹年龄”日本地质学会杂志。

Sawada,Y.,Sampei,Y.,Hyodo,M.,Yagami,T.and ukue,M.: "Estimation of emplacement temperature of pyroclastic flow using by H/C ratios of carbonaceous wood."Journal of Volcanology and Geothermal Research Geothermal Research. 104. 1-20 (2000)

Sawada，Y.，Sampei，Y.，Hyodo，M.，Yagami，T. 和 ukue，M.：“利用碳质木的 H/C 比率估算火山碎屑流的就位温度。”火山学与地热研究杂志

Sampei, Y., Suzuki, N., Kogane, N., Komatsu, H., Kawamura, A., Moko, H., Mano, K., Echigo, K.and Hosaka, M.: "Organic carbon contents of Neogene mudstones in Japan"Geoscience Report of Shimane University. 19. 77-95 (2000)

Sampei, Y.、Suzuki, N.、Kogane, N.、Komatsu, H.、Kawamura, A.、Moko, H.、Mano, K.、Echigo, K. 和 Hosaka, M.：“有机碳含量

Ishiga, H., Nakamura, T., Sampei, Y., Tokuoka, T.and Takayasu, K: "Geochemical record of the Holocene Jomon transgression and human activity in coastal lagoon sediments of the San' in district, SW Japan"Global and Planetary Change. 25. 223-237 (2000)

Ishiga, H.、Nakamura, T.、Sampei, Y.、Tokuoka, T. 和 Takayasu, K：“日本西南地区 San 沿海泻湖沉积物中全新世绳文海侵和人类活动的地球化学记录”全球

Sawada, Y., Sampei, Y., Hyodo, M., Yagami, T.and ukue, M.: "Estimation of emplacement temperature of pyroclastic flow using by H/C ratios of carbonaceous wood"Journal pf Volcanology and Geothermal Research Geothermal Research. 104. 1-20 (2000)

Sawada, Y.、Sampei, Y.、Hyodo, M.、Yagami, T. 和 ukue, M.：“利用碳质木材的 H/C 比率估算火山碎屑流的就位温度”火山学与地热研究杂志 地热