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.日本泥岩中用甲基二苯并噻吩作为宽范围成熟度指标表征甲基菲：用甲基二苯并噻吩对日本中新世七谷-寺泊马里泥岩进行了宽范围成熟度指标甲基菲指数（PFI）的表征。编队（通产省富仓和东条）对新泻县、秋田县的恩纳川组、岛根县的常总寺组和高知县的白垩纪-第三纪四万十群进行了调查，以了解 MPI 的变化及其与 %Ro 的关系。对于所有岩石样品，MPI 均从 0.7 增加到 0.7。成熟区为 4.2 (%Ro=0.5-1.9)，成熟区从 4.2 降至 1.3通过地球化学动力学讨论了过成熟区（%Ro=1.9-4.5），表明 MPI 的变化取决于中间体 MPI 的产生以及甲基从 α 异构体向 β 的转变。 -异构体.2.甲基菲异构化的地球化学动力学参数：为了了解油窗中MPI的变化，通过加热实验考察了MPI变化的地球化学动力学女川组猿川原油与粘土矿物（膨润土）和水在热/压稳定反应器中在 300、350、370、380、400 和 450℃ 下的活化能（E）和频率因子（A）。通过加热实验获得上斜率内的 MPI 变化如下：E = 57.2 kcal/mol 和 A = 2.23 x 10^<12>s^<-1>据此估算了部分盆地MPI与最高古气温的关系。3.日本西南部岛根半岛中新世Josoji黑色泥岩的接触变质作用：成分变化。选择了岛根半岛中新世常寺黑色泥岩的三个代表性露头，通过接触变质作用对有机质进行了研究。从接触面约 30m 处采集到的几个岩石样品被认为比安山岩对泥岩的热影响更大。低于10%，但安山岩仅占70%左右。4.中新世常寺地层人工加热黑色泥岩有机质成分变化，日本西南部：这项研究是对沉积岩中有机质分解的初步实验工作，研究了岛根半岛中新世 Josoji 地层的白岩泥岩在恒温炉中加热后有机质的成分变化。 i. 200、250、300、350、400、450、500、550 和 600℃ 60O℃实验2天后，TOC（总有机碳）、TN（总氮）和TS（总硫）分别降至初始岩石的50%、25%和20%。 CPI（碳偏好指数）从4.3下降到0.3，HI（氢指数）从1.1下降到0.25。 43 比 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

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

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

石原敬久,大平寛人,立石雅昭: "山形県新庄盆地に分布する折渡層のフィンショントラック年代"地質学雑誌. 106. 905-908 (2000)

Takahisa Ishihara，Hiroto Ohira，Masaaki Tateishi：“山形县新庄盆地分布的Oriwata组的Finchon径迹年龄”地质杂志106。905-908（2000）。