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1.
SOFM储层综合评价方法及其在延吉盆地的应用 总被引：1，自引：0，他引：1
通过对已有储层评价方法优势与不足的分析,提出在空间数据库基础上应用自组织特征映射神经网络进行油气储层评价,并对延吉盆地大砬子组储层进行了评价。评价结果显示：Ⅰ级储集层主要发育于朝阳川凹陷中央-延D4井西缘、呈椭圆状分布,朝阳川凹陷西缘即延D6、延3之间呈月牙状分布;Ⅱ级储集层区块较大,分布集中在朝阳川凹陷周缘及帽儿山凸起,在清茶馆凹陷的东缘、南缘和德新凹陷的北缘呈不规则分布;Ⅲ级主要发育于朝阳川凹陷中央-朝阳川镇南部,清茶馆凹陷东缘,呈条带、小块状零星分布,德新凹陷大部呈不规则分布;Ⅳ级主要发育于西部隆起区、练花洞单斜一带,在茶清馆凹陷中央也有零星分布;其它地区是储层物性发育较差的Ⅴ级。 相似文献
2.
延吉盆地为一中生代断陷型盆地,自西向东划分为西部斜坡、中央坳陷、太平隆起、东部坳陷4个构造单元。沉积盖层主要发育白垩系的屯田营组、头道组、铜佛寺组、大砬子组和龙井组,其中大砬子组已发现良好的油气显示和工业油气流,是重要的勘探目的层。利用大量的野外露头、岩心、测井和地震资料对大砬子组开展了沉积特征和沉积相研究,结果表明:其主要发育扇三角洲相和湖泊相沉积,局部发育冲积扇相,其中,扇三角洲识别出扇三角洲平原和扇三角洲前缘亚相,湖泊相识别出滨浅湖和半深湖亚相;盆地在大砬子组沉积时期物源供给充足,物源方向主要为西部和北部;该盆地大砬子组储层多为扇三角洲沉积砂体,砂岩层具有一定的沉积厚度,砂体也具有一定的连续性。综合储层物性分析、压汞分析等资料对储层宏观物性和微观孔隙结构进行研究的结果表明:大砬子组储层物性变化较大,整体表现为中孔低渗;储层孔隙结构主要为Ⅱ—Ⅲ型,孔隙喉道半径整体相对较小。 相似文献
3.
吉林省松江盆地油气勘探程度很低。通过松江盆地下白垩统长财组和大砬子组的系统取样与多项地球化学指标测试,详细评价了该区烃源岩的有机质丰度、类型及成熟度等各项指标。初步得出:松江盆地面积虽小,但巨厚的下白垩统沉积盖层中,大砬子组二段烃源岩发育,有机质丰度高,类型较好,且主要处于成熟阶段,具有较好的生烃能力;区内长财组和大砬子组一段发育储集层和盖层,形成了以上生下储为主的有利生储盖组合条件,具有一定的油气勘探前景,是松辽盆地外围油气勘探的较有利目标区。 相似文献
4.
从微观到宏观研究了盖层封闭特征,从垂向和侧向两个方面研究了断层的封闭特征,通过古流体势场恢复,研究了本区油气运聚形式。根据封盖条件、生储特征、运移特征,将延吉盆地东部坳陷划分了三个油气运聚系统,即德新地区封闭型运聚成藏系统、广兴—东风地区半封闭型油气运聚系统、延吉—东盛涌地区油气逸散系统。在油气运聚系统划分的基础上,对有利探区进行了预测。 相似文献
5.
东海陆架盆地西部坳陷带中生界分布特征及其有利区探讨 总被引：2，自引：0，他引：2
对东海陆架盆地西部坳陷带中生界分布特征及其油气勘探方向的研究认为：研究区中生界分布广、厚度大,主要沉积在南部地区,最大厚度超过6 000 m,除凹陷内有分布外,隆起区也有分布。白垩系主要发育在长江凹陷、海礁低凸起、瓯江凹陷、闽江凹陷和台北低凸起地区;侏罗系主要发育在闽江凹陷。闽江凹陷的中生界厚度大,烃源岩条件好,局部构造圈闭发育,既有区域性盖层又有局部盖层,生储盖条件优越。因此,闽江凹陷是东海陆架盆地西部坳陷带油气勘探前景最好的区域。 相似文献
6.
塔里木盆地北部坳陷周缘发现的大量油气主要来源于下寒武统泥质烃源岩.坳陷西部下寒武统发育玉尔吐斯组,东部发育西大山和西山布拉克组,两者在有机质丰度、类型和成熟度等方面存在明显不同,微量元素显示玉尔吐斯组具有较高的古生产力,总体反映西部水体较深的强还原斜坡相沉积环境,而东部则反映为水体更深、还原程度更高的盆地相沉积环境.通过地震标定及解释,刻画了下寒武统烃源岩厚度图,发现了满西、满东两个沉积凹陷,结合总有机碳(TOC)分布图,对下寒武统烃源岩生烃潜力进行了计算及成图.北部坳陷生烃量巨大,而目前已发现油气仅占很小一部分,所以北部坳陷及周缘下步勘探潜力巨大. 相似文献
7.
我国一些第三纪盆地发育了膏盐与生油岩同层位的沉积。本文通过我国东部的东濮凹陷和西部的塔里木盆地塔北拗陷的对比研究,指出盐类与生油岩可以同期沉积,提出了深水和浅水两种盐湖相生油岩的沉积模式,并且论述了两种盐湖环境有机质的保存及其地化特征、生油气潜力。 相似文献
8.
本文以石炭系为主要研究目的层,综合地层、构造、油气等研究成果,从目的层生烃条件、储集条件及生储盖组合等方面评述了研究区石油地质条件.下石炭统烃源岩为研究区主要烃源岩,分布广、厚度较大,有机质丰度较高、成熟度较高,生烃潜力较大;储层主要发育孔隙型和裂缝型两种类型;盖层主要为石炭系和二叠系.结合生、储、盖条件综合分析,研究区发育4套生、储、盖组合,并根据各构造单元油气的地质条件,将研究区划分为两个远景区:西部坳陷带(特斯布拉克坳陷和科克潘索尔坳陷北部)和东部隆起带(萨雷苏隆起和塔斯金隆起北部),4个最有利局部构造:西背斜、克济尔卡克、塔拉普及中萨雷苏构造. 相似文献
9.
本文对莘县凹陷的地温特征及其影响因素作了讨论，并分析了下第三系生油岩的发育特征与有机质的丰度、类型及成熟度特征。指出本区地温梯度低、生油层埋藏浅、有机质成熟度偏低、生油岩体积小，难以生成大量成熟的油气。 相似文献
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11.
Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
12.
Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
13.
The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
14.
Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931. 相似文献
15.
正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.) 相似文献
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正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.) 相似文献
17.
正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.) 相似文献
18.
正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus., 相似文献
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正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an 相似文献
20.
正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of 相似文献