油气成藏系统划分方法及其应用   总被引：4，自引：0，他引：4  

付广  王宏伟 《海相油气地质》1996,1(4):21-25

在深入研究油气藏系统理论和油气势能理论的基础上，利用油气势能在剖面上的极值点和储集层中油气势能等值线的分隔槽，确定油气成藏的上边界和四周边界，建立了一套油气成藏系统的划分方法，并将其应用于松辽盆地大太长垣以地区扶余油层的油气成藏系统的划分中，其结果较客观地反映了该区扶余油层油气聚集规律，充分证明了此方法的实用性。  相似文献   

Annotated bibliography of methodology for assessment of undiscovered oil and gas resources   总被引：1，自引：0，他引：1  

Ronald R. Charpentier  Gordon L. Dolton  Gregory F. Ulmishek 《Natural Resources Research》1995,4(2):154-186

An annotated bibliography of methodology of assessment of undiscovered oil and gas resources is presented as a useful reference for those engaged in resource assessment. The articles that are included deal only with quantitative assessment of undiscovered or inferred resources. the articles in this bibliography are classified largely according to the major assessment method that was applied in each situation. Major assessment methods include areal and volumetric yield methods, field size distributions, historical extrapolation, deposit modeling, organic geochemical mass balance methods, and direct expert assessment. Other categories include mathematical tools, reserve growth/confirmation, quantitative characterization of undiscovered resources, and general topics. For the purpose of future updates, we solicit contributions of articles that may have been missed in the preparation of this bibliography.  相似文献   

Thrust and nappe tectonics of west Devon     

K.P. Isaac 《Proceedings of the Geologists' Association. Geologists' Association》1985,96(2):109-127

  相似文献   

油气幕式成藏及其驱动机制和识别标志   总被引：33，自引：4，他引：33       下载免费PDF全文

郝芳  邹华耀  杨旭升  王敏芳 《地质科学》2003,38(3):403-412

连续稳态流动和周期性(幕式)瞬态流动是沉积盆地流体的 2种流动方式。幕式流体流动是压力和应力的作用引起地层周期性破裂或断裂、先存裂隙周期性开启的结果。幕式成藏是沉积盆地中油气与地层水组成的混相、不连续流体的多期次充注/聚集过程,超压顶界面附近、底辟和深断裂附近是幕式成藏的有利场所。与油气稳态连续聚集过程相比,幕式成藏更快,大 中型油气田可在较短的时间内形成,根据传统模式难以成藏的年轻圈闭可成为有效的勘探目标。幕式流体流动的主要特征是流体成份和流动过程的不连续性、流体流动过程中温度、压力的快速变化及流体流动的多期性和周期性。流体的时空非均质性、流体流动的瞬态温度响应和运移相态分异及其揭示的多期流体相互作用是幕式成藏的有效识别标志。  相似文献   

Fluorite deposits at Encantada–Buenavista, Mexico: products of Mississippi Valley type processes     

E. Gonzlez-Partida  A. Carrillo-Chvez  J. O. W. Grimmer  J. Pironon  J. Mutterer  G. Levresse 《Ore Geology Reviews》2003,23(3-4):107-124

Petroleum and aqueous fluid inclusions from the Encantada–Buenavista fluorite mineralized zone in northern Mexico were analyzed by microthermometry, UV fluorescence, Raman Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR) and Confocal Scanning Laser Microscopy (CSLM) to evaluate the geochemical evolution of the mineralizing fluids. Two-phase (petroleum or brine+vapor) and three-phase (petroleum+brine+vapor) inclusions are described. Aqueous and petroleum-rich inclusions commonly occur in the same plane. Vapor-decrepitated and stretched fluid inclusions are present. A low-salinity methane-saturated fluid and a high salinity-fluid with highly variable methane contents are recognized. H₂S is not quantified but is always detected in close association with methane. Petroleum inclusions are of two types: a low methane petroleum fluid (20 mol%) with low T_h (60 °C) and a petroleum fluid with a methane of content near 30 mol% and a T_h of 90 °C.Pressure and temperature diagrams for the aqueous and petroleum inclusions show three main intersects that allow P–T–X reconstruction of fluid evolution at La Encantada–Buenavista. A CH₄- and H₂S-rich low-salinity brine was mixed with oil that migrated under hydrostatic conditions with a thermal gradient of 70 °C/km. The arrival and mixing of a high-salinity aqueous fluid produced overpressure to 300 bars. A return to hydrostatic conditions was accompanied by an increase in the thermal gradient.The brine related to the fluorite orebodies appears to have a genetic relationship with the brines reported from the Jurassic petroleum basins located west of the fluorite bodies and similarities with reported fluids from Mississippi Valley type deposits. It is interpreted that the fluorine-rich fluids migrated toward the platform margins during the mid-Tertiary (30 to 32 Ma) using extension zones related to Basin and Range tectonism. Mixing of two different brines was responsible for precipitation and mineralization. Heat from magmas, related to tectonic extension, caused decrepitation and changes in the shape of fluid inclusions near the contact zones.  相似文献   

从滨里海盆地上古生界油气探讨中国海相碳酸盐岩油气勘探的科学思路   总被引：6，自引：0，他引：6  

张景廉  王新民  李相博  于均民  周晓峰 《海相油气地质》2002,7(3):50-58

中国海相碳酸盐岩油气勘探“久攻不克”,其中碳酸盐岩有机质丰度和油气运移是两大难题。滨里海盆地上古生界油气储量的地质成藏条件分析提供了一种碳酸盐岩油气成藏模式,即碳酸盐岩油气生成与地幔流体以及与中地壳的低速、高导层有关。原油、沥青、干酪根的 Pb、Sr、Nd 同位素组成、碳酸盐岩矿物与含水矿物的高温、高压实验、热液条件下 HCO_3~-与 H_2的实验均证实了上述认识,油气可以通过无机反应生成。根据这一油气生成模式,应该重新审视中国油气勘探的方针。近期可在西部三大克拉通盆地(塔里木盆地、四川盆地、鄂尔多斯盆地)及南方海相碳酸盐岩地区以“碳酸盐岩—生物礁(白云岩化)—膏盐”的岩性结构为模式有望找到大型、超大型油气田,关键是对生物礁的勘探及识别技术的突破、白云岩孔洞、裂缝储层的识别、预测及膏盐层钻井技术的改进。  相似文献   

Thermal history of Canadian Williston basin from apatite fission-track thermochronology—implications for petroleum systems and geodynamic history     

K. G. Osadetz  B. P. Kohn  S. Feinstein  P. B. O'Sullivan   《Tectonophysics》2002,349(1-4)

Apatite fission track (AFT) thermochronology has been applied to a composite depth profile of Precambrian basement rocks underlying the Phanerozoic Canadian Williston Basin. Thermal histories derived from the AFT data record cycles of heating and cooling which follow the pattern of regional burial history, but which also indicate major temporal and geographic variations in the timing and degree of maximum Phanerozoic temperatures. These variations in the thermal history were not previously recognised from organic maturity indicators and subsidence models. Specifically, our study suggests a late Paleozoic heat flow anomaly with a geographic extent closer to that of Middle Devonian–Carboniferous Kaskaskia subsidence patterns than to that of the Williston Basin proper. This thermal anomaly has both economic and geodynamic significance. The recognition that potential Upper Cambrian–Lower Ordovician petroleum source rocks became fully mature during the late Paleozoic distinguishes that petroleum system from others that entered the main hydrocarbon generation stage in latest Cretaceous and Paleogene time. The late Paleozoic heat flow anomaly suggested from the AFT data implies a geodynamic coupling between inelastic Kaskaskia subsidence and previously inferred late Paleozoic lithospheric weakening. While the temporally varying heat flow model is preferred, the lack of independent constraints on the maximum thickness of upper Paleozoic strata precludes the outright rejection of the previous constant heat flow model. The AFT data provide important new constraints on the evolution of the epicratonic Williston Basin and its geodynamic models.  相似文献   

Integrating structural geology and petroleum systems modeling – A pilot project from Bolivia's fold and thrust belt     

Friedemann Baur  Matias Di Benedetto  Thomas Fuchs  Carolyn Lampe  Simone Sciamanna 《Marine and Petroleum Geology》2009

For the first time, a new approach to petroleum systems analysis is presented which allows full integration of tectonic and palinspastic restoration with three-dimensional (3D), PVT-controlled, multi-component, three-phase petroleum migration analysis through time. A systematic modeling study has been applied to a study area dominated by fold and thrust belts located in the Sub Andean orogeny near Tarija, Bolivia. The project has been performed with a special focus on the simulation technique and on the correct distribution of temperature, source-rock maturity and pressure development through time with reference to its input data. This is the first pilot project presenting a 3D numerical model in a compressional structural regime to which the basin modeling approach has been applied to explain the observed distribution of temperature, pressure, maturity and petroleum accumulations in general.  相似文献   

南海北部边缘盆地油气勘探现状与深水油气资源前景   总被引：18，自引：0，他引：18  

何家雄  施小斌  夏斌  刘海龄  阎贫  姚永坚  张树林 《地球科学进展》2007,22(3):261-270

自20世纪60年代初开展浅海油气苗调查及浅井钻探以来，南海北部边缘盆地迄今在陆架浅水区已勘探发现多个油气田，建成了一定储量规模的油气产能，基本构成了南海北部油气富集区的格[JP2]局。然而，如何保持油气可持续发展，尽快寻找油气储量接替的新领域，这是该区油气勘探所面临的关键问题。南海北部陆坡深水区与世界深水盆地一样，颇具油气资源潜力和勘探前景，近期LW311深水探井钻探的新发现表明，其应是该区油气资源接替非常现实的战略选区和勘探靶区。  相似文献   

Organic compound tracers of fine soil and sand particles during summer in the metropolitan area of Riyadh,Saudi Arabia     

Khalid Al-Mutlaq  Ahmed I. Rushdi  Bernd R. T. Simoneit 《Environmental Geology》2007,52(3):559-571

Soil and sand fine particles, which may be resuspended as fine dust in the atmosphere, contain a variety of anthropogenic and natural organic components. Samples of fine soil and sand particles (sieved to <125 μM) were collected from the Riyadh area in the summer of 2003 and extracted with a mixture of dichloromethane and methanol (3:1, v:v). The derivatized total extracts were analyzed by gas chromatography–mass spectrometry in order to characterize the composition and sources of the organic components. Both anthropogenic and natural biogenic inputs were the major sources of the organic compounds in these extracts. Discarded plastics and vehicular emission products were the major anthropogenic sources in the fine particles from populated areas of the city. Their tracers were plasticizers, UCM, n-alkanes, hopanes and traces of steranes. Vegetation was the major natural source of organic compounds in samples from outside Riyadh and included n-alkanols, n-alkanoic acids, n-alkanes, methyl alkanoates, sterols and triterpenoids. Carbohydrates had high concentrations (42–54%) in all samples and indicate sources from decomposition of cellulose and/or the presence of viable microbiota such as bacteria and fungi. The results were also compared with the data obtained in winter 2002 and showed that anthropogenic inputs were higher in summer than in winter, whereas the opposite trend was observed for natural inputs.  相似文献