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通过系统的有机地球化学分析,对川东北陆相地层主力烃源岩进行了系统评价,对油、源进行了精细对比,查明了非常规油气的成藏特征。分析认为陆相地层须家河组、自流井组和千佛崖组发育大量有效烃源岩甚至优质烃源岩,有机质丰度较高,各地区各层系TOC平均值介于0.41%~2.99%之间,有机质类型主要为Ⅱ,Ⅲ型,处于成熟–过成熟阶段(Ro介于1.3%~2.0%之间),具有良好的生烃潜力,可成为该区中、下侏罗统非常规油气的主力烃源岩。经油源对比及成藏特征分析,发现中、下侏罗统陆相非常规油气来源于陆相烃源岩,未显示海相油气来源,说明由于陆相储层异常致密,导致油气运移困难而源内或近源成藏。其中,元坝–阆中地区千佛崖组的油气来自于自流井组烃源岩,自流井组的油气来自于自流井组及须家河组两套烃源岩。宣汉–达县地区的油气来自于须家河组烃源岩。下侏罗统泥页岩具备页岩气形成的条件,中、下侏罗统致密砂岩具备致密砂岩油形成的条件。 相似文献
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通过系统的有机地球化学分析, 对川东北陆相地层主力烃源岩进行了系统评价, 对油、源进行了精细对比, 查明了非常规油气的成藏特征。分析认为陆相地层须家河组、自流井组和千佛崖组发育大量有效烃源岩甚至优质烃源岩, 有机质丰度较高, 各地区各层系TOC平均值介于0.41%~2.99%之间, 有机质类型主要为Ⅱ, Ⅲ型, 处于成熟?过成熟阶段(Ro介于 1.3%~2.0%之间), 具有良好的生烃潜力, 可成为该区中、下侏罗统 非常规油气的主力烃源岩。经油源对比及成藏特征分析, 发现中、下侏罗统陆相非常规油气来源于陆相烃源岩, 未显示海相油气来源, 说明由于陆相储层异常致密, 导致油气运移困难而源内或近源成藏。其中, 元坝?阆中地区千佛崖组的油气来自于自流井组烃源岩, 自流井组的油气来自于自流井组及须家河组两套烃源岩。宣汉?达县地区的油气来自于须家河组烃源岩。下侏罗统泥页岩具备页岩气形成的条件, 中、下侏罗统致密砂岩具备致密砂岩油形成的条件。 相似文献
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郭柏英 《安徽理工大学学报(自然科学版)》1984,(3)
含煤岩系为上三叠统(T_3l)及下侏罗统(J_1m),由中—细粒砂岩、粉砂岩、泥岩夹薄煤层组成。根据粒度分析结果,可知砂岩的粒度概率图主要属河流及浅湖型。煤系中见水平层理、沙纹层理、大型交错层理、平行层理及块状层理,它们常构成特定的垂向序列。煤系内产丰富的植物化石,属热带—亚热带植物群。 相分析表明:煤系属大陆河流及湖泊沉积,沉积类型有冲积扇、辫状河、曲流河、河漫滩、湖泊、沼泽等。T_3l以湖泊沉积为主,而J_1m则以河流相为主。 作者根据该区古构造格局及古地理环境指出,煤层主要产于河漫滩沼泽及浅湖沼泽中,聚煤有利地区在无为县石罗山、昆山至枞阳县小含山一带。 相似文献
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吐哈盆地胜北洼陷中侏罗统储层油气资源分布广泛,对其流体包裹体特征和成藏期次进行系统研究,有利于油气的精细勘探开发。为厘定胜北洼陷中侏罗统储层油气藏形成和分布规律,基于包裹体岩相学、荧光观测及显微测温技术,分析流体包裹体特征,并结合埋藏史模拟对中侏罗致密砂岩储层油气成藏时间与期次进行研究。结果表明:胜北洼陷中侏罗统储层发育大量烃类包裹体和次生盐水包裹体。其中,油包裹体通常以串珠状成带或成群赋存于石英颗粒愈合裂纹和穿石英颗粒裂纹内,荧光颜色多呈浅黄色和蓝绿,分别指示成熟和高熟油气充注,气包裹体不发荧光;烃类包裹体以及与之共生的盐水包裹体均一温度分布范围较广,呈多幕次分布特征。结合沉积地层埋藏史和热史模拟结果,可见研究区油气成藏主要有两期,早期成藏主要发生在晚侏罗至早白垩世,晚期成藏主要发生在晚第三纪至今,这与基于烃源岩生排烃史及圈闭形成时间所限定的油气成藏时间和期次相一致。该研究对于进一步明确胜北洼陷中侏罗统致密油气勘探有利区具有指导意义。 相似文献
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中亚地区费尔干纳盆地油气地质特征 总被引:12,自引:0,他引:12
对中亚地区费尔干纳盆地的地层、沉积和石油地质特征等进行了综合研究.该盆地的烃源岩为下第三系、上白垩统和中下侏罗统的海相与湖相泥岩、页岩和泥灰岩,有四套含油气层系,主要油气储集层为下第三系的滨浅海相和三角洲相砂岩和碳酸盐岩,多套泥岩、膏岩和泥灰岩为区域性和局部盖层,油气主要运移期和聚集期发生在早上新世,油气圈闭和油气田(藏)主要有构造型、构造-地层复合型和地层型等3种,目前油气主要分布在南部边缘构造带的两个含油气区.全盆地最大的油气田--明布拉克油气田的发现,使盆地油气潜力评价价值更高,可为整个中亚地区的油气勘探开发提供借鉴和指导作用. 相似文献
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作为准噶尔盆地腹部较早开发的地区之一,近年来在滴南凸起下白垩统及白家海凸起-阜北斜坡区的中上侏罗统地层内相继发现了高产油气藏,揭示了该区中上侏罗统-下白垩统具有良好的生、储、盖成藏条件,丰富的圈闭类型和有效的疏导体系。在成藏条件上,东道海子凹陷、阜康凹陷的石炭统、二叠系平地泉组以及侏罗系的八道湾组、三工河组、西山窑组等多套烃源岩为侏罗-白垩系成藏提供了充足的油气,河流、三角洲沉积体系控制下的中上侏罗统头屯河组、齐古组以及下白垩统的清水河组、呼图壁河组分布有多套有效的储盖组合,长期继承性的断裂系统及砂体和不整合面作为油气的疏导体系,在成藏条件分析的基础上总结了滴南凸起-阜北斜坡地区3种油气成藏模式。 相似文献
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在伊犁盆地北缘和南缘下 -中侏罗统沉积微相和岩石类型研究的基础上 ,对伊犁盆地北缘和南缘侏罗纪地层进行了详细对比。认为盆地南缘下 -中侏罗统同样可以划分为八道湾组、三工河组和西山窑组 ,并分别对应于水西沟群 ~ 旋回。这一研究对于伊犁盆地基础地质研究和可地浸砂岩型铀矿床的勘探具有重要意义 相似文献
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Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness. 相似文献
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Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly. 相似文献
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理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。 相似文献
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As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death. 相似文献
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Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula- 相似文献
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Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re- 相似文献
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Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that 相似文献
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《上海师范大学学报(自然科学版)》2014,(5):550
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with 相似文献
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《吉林大学学报(理学版)》2014,(5):1105
<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has 相似文献