The Occurrence of Oleananes in the Beibuwan Basin and Its Application to the Study of Maturity and Oil-Source Rock Correlation   总被引：3，自引：0，他引：3  

LI Meijun WANG Tieguan State Key Laboratory of Petroleum Resource  Prospecting  Earth Sciences  Geoinformatics School  China University of Petroleum  Beijing  China LIU Ju ZHANG Meizhu MA Qinglin GAO Lihui Southern Oil Exploration  Development Company  PetroChina  Guangzhou  China LU Hong Guangzhou Institute of Geochemistry  Chinese Academy of Sciences  Guangzhou  China 《《地质学报》英文版》2008,82(3):585-595

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.  相似文献   

烃源岩中矿物沥青基质成烃潜力探讨   总被引：4，自引：1，他引：4  

陈建平  黄第藩 《地球化学》1997,26(6):18-24

烃源岩中存在大量矿物沥青基质，目前对其成烃潜力知之甚少。本文以酒东盆地侏罗系和白垩系烃源岩为例，从矿物沥青基质与有机显微组分，无机矿物、有机质丰度、有机质类型，有机质成熟度的关系及其荧光变化特点探讨其组成及成烃潜力，结果表明，矿物沥青基质中有机质含量低，且以次生有机质为主，原生有机质含量较少，成烃潜力有限。  相似文献   

固沙林的经营基础与技术对策   总被引：28，自引：1，他引：28  

姜凤岐  曾德慧 《中国沙漠》1997,17(3):250-254

在分析固沙林经营目的的基础上，提出了该林种的防护成熟定义，用郁闭度（覆盖度）达到π４为成熟的主要特征，通过冠幅与胸径、胸径与年龄的关系确定防护成熟龄；此外以初始成熟龄和更新龄为时间界限将林分分成３个经营时期：郁闭前期、防护成熟期和更新期，并提出了各个时期相应的经营对策。  相似文献   

应重视选用芳烃演化参数评价高演化碳酸盐岩     

高志龙 《海相油气地质》1997,2(1):11-14

现被广泛应用的测定高演化碳酸盐岩成熟度指标的多项有机岩石学评价方法，各有其不同的局限性，应用效果并不理想。研究发现，可利用芳烃演化新参数来代替其它失效的分子参数来评价碳酸盐岩有机质。芳烃因其结构、组成的特殊性和稳定性，在高演化阶段与油气生成及煤源岩成熟度有着良好的相关性，具有成为高演化碳酸盐岩成熟度指标的基础。从生产实践的角度看，芳烃演化参数有特殊适用性及选取的可行性。  相似文献   

长岭断陷东岭鼻状构造带沙河子组烃源岩特征及评价     

刘曼丽  高福红  徐文 《世界地质》2016,35(1):184-190

为确定东岭鼻状构造带沙河子组烃源岩的发育程度,本文应用有机地球化学分析方法,对沙河子组的暗色泥岩进行了有机质丰度、类型和成熟度的研究。研究结果显示:有机碳平均含量为2.21%,生烃潜量平均值为9.13 mg/g,氯仿沥青"A"含量0.5%,总烃含量500×10~(-6),说明沙河子组暗色泥岩有机质丰度较高;有机显微组分中惰质组分含量较低,"壳质组+腐泥组"相对含量远远高于镜质组和惰质组。T_(max)为446℃~462℃,结合T_(max)与氢指数和降解指数的关系,指示有机质干酪根类型以II1~I型为主;镜质体反射率(Ro)为0.56%~0.71%,处于低成熟-成熟阶段。综合分析认为沙河子组烃源岩有机质丰度高,有机质类型好,有机质成熟度处于低成熟-成熟阶段,属于中等-好的烃源岩,以生油为主。东岭断鼻构造带沙河子组具有较大的勘探潜力。  相似文献   

Assessing thermal maturity of Palaeozoic rocks from reflectance of chitinozoa as constrained by geochemical indicators: an example from southern Ontario, Canada     

M. Obermajer  M.G. Fowler  F. Goodarzi  L.R. Snowdon 《Marine and Petroleum Geology》1996,13(8):907-919

The reflectance of chitinozoa (%ChR₀) was investigated as an alternative technique of determining the level of thermal maturity of organic-rich Palaeozoic rocks in southern Ontario. These sedimentary strata, which include the Ordovician Collingwood Member and the Blue Mountain Formation, as well as the Devonian Marcellus Formation, lack vitrinite precluding the application of a standard vitrinite reflectance (%VR₀) technique. ChR₀ shows a proportional increase at marginal to moderate maturities, being on average 20 to 25% higher than expected vitrinite reflectance. The reflectance data fall into a very narrow range showing a high degree of consistency for each lithostratigraphic unit. The average ChR₀ are as follows: Collingwood Mbr 0.63% (Georgian Bay area) and 0.88% (Toronto area), Blue Mountain Fm 0.92%, Marcellus Fm 0.68%. Correlation with more conventional optical and geochemical maturity parameters obtained from the same set of samples (fluorescence of Tasmanites, Leiosphaeridia and Gloeocapsomorpha alginite, Rock-Eval Tmax, extract data, distribution of terpanes and steranes in extracts) indicates that, within the area of study, the beginning of the catagenetic stage corresponds to ChR₀=0.65% (equivalent VR=0.50%) whereas the threshold of significant oil generation is reached at ChR₀=0.9% (equivalent VR=0.70%). Therefore the Blue Mountain Formation is thermally mature with respect to hydrocarbon generation throughout the whole area of study. The Collingwood shales are mature only in the Toronto area while those occurring in the Georgian Bay area as well as the Marcellus shales have yet to enter the main stage of hydrocarbon generation. This integrated approach of assessing thermal maturity shows that ChR₀, when constrained with other maturity parameters, is a very reliable indicator of thermal maturity in Lower to Middle Palaeozoic sedimentary rocks.  相似文献   

Effects of photoperiod and exercise on growth, liver size, and age at puberty in farmed Atlantic cod (Gadus morhua L.)     

Karlsen  O.; Norberg  B.; Kjesbu  O.S.; Taranger  G.L. 《ICES Journal of Marine Science》2006,63(2):355-364

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Does the largest chela of the males of three crab species undergo an allometric change that can be used to determine morphometric maturity?   总被引：2，自引：1，他引：2  

Hall  Norman G.; Smith  Kim D.; de Lestang  Simon; Potter  Ian C. 《ICES Journal of Marine Science》2006,63(1):140-150

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Deep petroleum occurrences in the Lower Kura Depression, South Caspian Basin, Azerbaijan: an organic geochemical and basin modeling study   总被引：1，自引：0，他引：1  

Sedat Inan  M. Namik Yalin  Ibrahim S. Guliev  Kerem Kuliev  A. Akper Feizullayev 《Marine and Petroleum Geology》1997,14(7-8)

High sedimentation rates (as much as 2500 m/Ma) during Pliocene-Pleistocene, with a resultant undercompacted section as thick as 10,000 m, and lower than normal geothermal gradients are the main characteristics which have created all the means for generation and preservation of oil at deep layers in the Lower Kura Depression.Oils collected from eight different oil fields for analyses seem to have originated from a common source rock which probably is clastic, deposited in relatively subanoxic to suboxic transitional marine environment receiving low to moderate input of terrestrial organic matter.Oils from shallow (< 3000 m) and cold (< 70–80°C) reservoirs have been altered to various extent by bacterial activity.A computer-aided basin modeling study has been carried out to outline the spatial variation of the oil window and thus help in further identification of possible source rocks for the reservoired oil in the Lower Kura Depression. Results suggest that the potential hydrocarbon source horizons of the Miocene and Pliocene Red Bed Series of the so called Productive Succession are, even at depocenter areas, immature with respect to oil generation, and thus, are very unlikely to have been source rocks for the reservoired oils. However, the Oligocene-Lower Miocene Maykop rocks are marginally mature to mature depending on locality and the Eocene and older rocks are mature with respect to oil generation at all representative field locations. Oil generation commenced at the end of Pliocene and continues at present at depths between 6000 and 12,000 m.An unusually deep (> 10,000 m) oil window in the depocenter areas has been caused by the depressed isotherms due to extremely high sedimentation rates (up to 3000 m/Ma) for the last two million years. The main phase of oil generation is taking place at depths greater than what most of the wells in the study are have reached.  相似文献   

Continuous light delays sexual maturation and increases growth of Atlantic cod (Gadus morhua L.) in sea cages   总被引：1，自引：0，他引：1  

Taranger  G.L.; Aardal  L.; Hansen  T.; Kjesbu  O.S. 《ICES Journal of Marine Science》2006,63(2):365-375

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