鄂尔多斯盆地南部延长组烃源岩分布及其地球化学特征

为了研究鄂尔多斯盆地南部延长组烃源岩尤其是主力烃源岩的分布及其地球化学特征,系统采集了研究区具有代表性的样品,对其开展各项地球化学实验,并结合相关测井资料进行综合分析.结果表明:烃源岩厚度及有机质丰度分布受沉积环境的影响较大,靠近盆地中央的深湖—半深湖相的泥页岩发育、有机质丰度较高,盆地的边缘相带泥页岩发育程度低、有机质丰度低.长7烃源岩有机质类型以I-Ⅱ_1型为主,生油潜力大,为研究区主力烃源岩;长8,长9烃源岩有机质类型以Ⅱ_1型为了主,生油潜力中等,为次要烃源岩;长4+5和长6烃源岩有机质类型以Ⅱ_2-Ⅲ型为主,生油潜力相对较小,为较差的烃源岩.     

彰武断陷白垩系烃源岩地球化学特征与生烃潜力评价

利用地球化学测试手段,对松辽南部的彰武断陷白垩系烃源岩进行了评价,并探讨了其生烃潜力。彰武断陷白垩系烃源岩有机质丰度、类型以及成熟度统计分析与饱和烃色谱共同反映了:(1)九佛堂组烃源岩具有厚度大、有机质丰度高、类型好、成熟度低-成熟的"三高一低"的特征。(2)烃源岩有机质母质来源于低等水生生物与高等植物混生,九佛堂组主要来自半深湖-深湖相低等水生生物,沙海组更多地混入了陆生高等植物。(3)九佛堂组-沙海组烃源岩沉积水介质环境从半咸水-淡水的演变过程,总体处于还原环境。九佛堂组烃源岩是彰武断陷中主力烃源岩,具有较好-好的生油潜力,沙海组烃源岩次之。     

黄河口凹陷烃源岩特征及其在层序地层格架中的分布

基于钻井和实测资料对研究区进行有机地化和沉积学分析,总结典型富生烃凹陷黄河口凹陷3套湖相烃源岩的特征及沉积背景,以此为基础进行层序研究,探讨黄河口凹陷古近系湖相烃源岩有机质丰度评价指标随沉积旋回的演变和层序构型的不同所表现出来的变化趋势,预测优质烃源岩在层序地层格架中的分布规律。结果表明,沙三及沙一段均为好烃源岩,东二下—东三段为中—好的烃源岩,3套烃源岩有机质类型均以Ⅱ型为主;沙一段烃源岩发育于咸化水体的浅湖环境,东二下—东三段和沙三段烃源岩发育于淡水—微咸水中稳定的浅湖—深湖相沉积;地层中泥岩质量含量达60%以上时,烃源岩具较高的有机质丰度;优质烃源岩主要发育在以基准面上升半旋回为主的层序类型中,基准面上升和下降半旋回相当的层序类型中次之,在以基准面下降半旋回为主的层序类型中最次,且几种层序类型中的有机质丰度高值均出现在最大湖泛面附近。     

伊犁盆地中二叠统烃源岩有机质地球化学特征

目的 为探讨伊犁盆地中二叠统烃源岩沉积环境与地球化学特征的关系。方法 以地表剖面烃源岩的地球化学分析资料为主,结合部分井下样品分析数据,研究了泥岩的微量元素地球化学特征;利用不同岩类烃源岩有机碳含量及饱和烃气相色谱等特征,对烃源岩的沉积环境进行了研究。结果 伊犁盆地中二叠统烃源岩层系主要分布在塔姆齐萨依组,沉积水体的古盐度较高,为弱还原相-还原相沉积环境;半深湖-深湖相带沉积的还原程度强的黑灰色泥岩类烃源岩,大多有机质丰度高、类型好;河流一沼泽相带沉积的灰色-绿灰色泥岩类烃源岩有机质丰度较低、类型较差。结论 气候相对干燥、陆源碎屑物质补充不足或较长时间处于氧化程度较高的条件下沉积的碳酸盐岩类烃源岩,有机质丰度低、类型差;还原程度强、具一定深度水体的沉积相带是原始有机质沉积的良好场所,有机质能及时沉积、保存下来,且大多烃源岩有机质丰度高、类型好。     

开鲁盆地茫汉断陷烃源岩评价

利用工区参数井(哲参2井)样品分析化验资料,对茫汉断陷烃源岩的地球化学特征进行了定量研究.对其生烃能力进行了综合评价,并应用地震反演技术对茫汉断陷烃源岩空间分布进行了预测.研究表明,茫汉断陷烃源岩为半深湖、深湖相泥岩,有机质丰度指标高,干酪根类型以Ⅱ型为主,烃源岩有机质已成熟并进入生油门限,具有较强的生烃能力.地震反演...     

胶莱盆地东北部白垩系烃源岩有机地球化学特征

胶莱盆地东北部白垩系莱阳组下部的逍仙庄段和中部的水南段发育有两套暗色泥岩和碳酸盐岩沉积。其有机地球化学环境参数分析表明，这两套沉积其形成于缺氧还原的微咸水-咸水的半深湖-深湖环境，是盆地主要的烃源岩系。烃源岩有机碳含量较高，尤其是水南段可以达到中等-好烃源岩的标准。但烃源岩中可溶有机质含量变化较大，并以低值为主。生烃潜力变化较大，可溶有机质转化率和烃转化率都比较低。干酪根显微组分以腐泥组分含量高为特征，烃源岩有机质的输入以低等水生生物和原生生物为主，混有陆源高等植物。逍仙庄段干酪根以Ⅱ2-Ⅲ型为主，水南段以Ⅰ-Ⅱl型为主。综合Tmax，Ro,0EP，CPI和甾萜烷成熟度参数可以看出，烃源岩的成熟度已明显进入生油窗，逍仙庄段以成熟晚期和高成熟为特征，水南段正处于最佳生油期。     

黄河口凹陷古近系烃源岩的地球化学特征

渤海湾盆地黄河口凹陷古近系发育有3套烃源岩,分别是沙三段、沙一至二段和东三段湖相烃源岩.3套烃源岩在整个凹陷内都有分布,岩性以灰色、深灰色、灰黑色以及黑色的泥岩和油页岩为主.沙三段和沙一至二段烃源岩有机质丰度高,有机质类型好,以ⅡA型和ⅡB型为主,有机质正处于生烃的高峰阶段,这2套烃源岩是黄河口凹陷最有利的烃源岩.     

海拉尔盆地莫达木吉凹陷下白垩统烃源岩地球化学特征研究

海拉尔盆地莫达木吉凹陷下白垩统是区域油气勘探潜在目标层系,缺乏对烃源岩地球化学特征的详细研究。通过有机地球化学方法对莫达木吉凹陷下白垩统烃源岩地球化学特征进行了研究,认为南屯组(K_1n)和大磨拐河组(K_1d)烃源岩有机质类型以Ⅱ_2-Ⅲ型为主,差异性主要体现在有机质丰度和成熟度。同时,在恢复埋藏史的基础上建立了研究区主力烃源岩在该地质时期成熟度演化模型,模拟结果显示:大二段烃源岩处于未成熟-低成熟阶,大一段烃源岩处于低成熟阶段;南二段烃源岩处于低成熟-成熟阶段;南一段烃源岩热演化程度相对较高,达到成熟生油气阶段。综合分析得出大磨拐河组(K_1d)烃源岩有机质丰度整体较高,但热演化程度低,生烃潜力小;随着埋深的增加,烃源岩热演化程度增加,到南二段(K_1n_2)开始进入成熟生烃阶段,生烃潜力较大;南一段(K_1n_1)烃源岩有机质丰度低,为差烃源岩,生烃潜力较小。     

胶莱盆地东北部白垩系烃源岩有机地球化学特征

胶莱盆地东北部白垩系莱阳组下部的逍仙庄段和中部的水南段发育有两套暗色泥岩和碳酸盐岩沉积。其有机地球化学环境参数分析表明 ,这两套沉积其形成于缺氧还原的微咸水咸水的半深湖深湖环境 ,是盆地主要的烃源岩系。烃源岩有机碳含量较高 ,尤其是水南段可以达到中等—好烃源岩的标准。但烃源岩中可溶有机质含量变化较大 ,并以低值为主。生烃潜力变化较大 ,可溶有机质转化率和烃转化率都比较低。干酪根显微组分以腐泥组分含量高为特征 ,烃源岩有机质的输入以低等水生生物和原生生物为主 ,混有陆源高等植物。逍仙庄段干酪根以Ⅱ2 —Ⅲ型为主 ,水南段以Ⅰ—Ⅱ1型为主。综合Tmax,Ro,OEP ,CPI和甾萜烷成熟度参数可以看出 ,烃源岩的成熟度已明显进入生油窗 ,逍仙庄段以成熟晚期和高成熟为特征 ,水南段正处于最佳生油期。     

共和盆地下白垩系烃源岩评价

共和盆地下白垩系烃源岩分布在贵德坳陷,预测烃源岩面积1 500km2,平均厚度200m。在万秀剖面中,烃源岩主要分布在万二段和万三段下部,厚232m,烃源岩类型主要为滨浅湖相-深湖相黑色泥页岩和灰色泥岩,其有机质丰度达中-好生油岩标准,有机质类型主要为Ⅰ-Ⅱ型,实测镜质体反射率均大于0.7%,94.3%的样品热解峰温大于435℃,达到了有机质热演化的成熟至高成熟阶段,并且万二段优于万三段。研究表明,共和盆地白垩系烃源岩为一套好烃源岩,具有很高的生烃潜力。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.