Describing and generating facies models for reservoir characterisation: 2D map view     

E.J. Hill  C.M. Griffiths   《Marine and Petroleum Geology》2009,26(8):1554-1563

This paper documents a new method for describing channel-related sedimentary deposits based on formal language theory. Using this method an analogue model of a sedimentary deposit can be encoded as a grammar. A program, called a parser, has been developed which can generate stochastic maps of these sedimentary deposits based on information in a specified grammar. The maps of sedimentary deposits generated by the parser have the same type, spatial arrangement, shape and size distribution as the analogue model. The successful generation of depositional maps represents a crucial step in the ongoing development of a new technique designed to generate 3D static geological models of sedimentary successions. The maps can be conditioned to match sparse hard data in the form of channel segments interpreted from seismic horizon maps.  相似文献   

Provenance of deep-water reservoir sandstones from the Jubarte oil field,Campos Basin,Eastern Brazilian Margin     

Paola De Rossi Fontanelli  Luiz Fernando De Ros  Marcus Vinicius Dorneles Remus 《Marine and Petroleum Geology》2009

The provenance of the Maastrichtian deep-water reservoir sandstones from the Jubarte oil field (Campos Basin, eastern Brazil), was studied using an integrated approach that included quantitative petrography, conventional heavy mineral analysis, garnet mineral chemistry and zircon geochronology. The reservoirs are predominantly coarse, poorly-sorted sandstones with feldspathic composition derived from uplifted basement terrains. The fourth- and fifth-order depositional sequences analyzed show no major variations in composition or in provenance through time. However, variations in apatite:tourmaline presents potential to be used as a parameter for sandstone correlation within the field. The composition of heavy minerals indicates derivation from high temperature and low-to-medium pressure aluminous metapelitic rocks, from granites and subordinate mafic rocks, derived from the Cabo Frio Tectonic Domain and the Oriental terrain of Ribeira orogen, characterizing a supply route from SW to NE. The low ZTR index, as well as the absence of low-grade stable heavy minerals and of metasedimentary rock fragments, suggest that by the end of Cretaceous all supracrustal, low-grade terrains had already been totally eroded, and that plutonic, infracrustal rocks were exposed, similarly to the present situation.  相似文献   

Preliminary assessment of the geothermal potential of Rosario de la Frontera area (Salta,NW Argentina): Insight from hydro-geological,hydro-geochemical and structural investigations     

《Journal of South American Earth Sciences》2014

This work is part of a project aimed to the development and application of hydrogeological, hydrogeochemical and geological methodologies for the study of the geothermal system of Rosario de La Frontera (NW Argentina).The surface thermal manifestations of this area, whose temperatures range from 22.6 to 92.6 °C, are mainly located in the northern sector of Sierra de la Candelaria anticline. This regional structure crops out between the provinces of Salta and Tucuman (NW Argentina), at the foothills of the central Andean retro-wedge.The present investigation focuses on hydrogeological and structural data, and isotopic compositions (¹⁸O, D and ³H) of thermal springs.Preliminary results allowed to define: i) the meteoric origin of spring water and their long (more than 50 years) residence time at depth, ii) a positive water balance, ranging between 2 and 4 millions of m³/yr, and iii) a conservative geothermal reservoir volume of about 39 km³, iv) a geothermal potential with Er = 5.6*10¹⁸ J and Ef = 0.8*10¹⁸ J.  相似文献   

南方震旦系灯影组热液白云岩化及其对储层形成的影响研究——以黔中隆起为例   总被引：1，自引：0，他引：1       下载免费PDF全文

朱东亚  金之钧  孙冬胜  彭勇民  张荣强  袁玉松 《地质科学》2014,(1):161-175

我国南方地区,特别是四川盆地震旦系灯影组是我国当前高演化天然气勘探的热点,以黔中隆起为例,新揭示了其中发育的热液白云岩化现象,并探讨了其对储层形成的影响。研究区灯影组白云岩溶蚀孔洞或裂缝中见有白云石、石英、沥青充填,其中一种充填的粗晶白云石具有弯曲晶面、波状消光特征,在岩石学特征上初步反映热液成因。地球化学特征进一步揭示了这种热液成因。不同采样位置热液白云石样品中流体包裹体均一温度平均为157.5 ℃～205.8 ℃,最高为253.5 ℃。热液白云石具有较轻的氧同位素组成,δ¹⁸O_PDB 位于 -15.3‰～-8.6‰之间,平均值为 -11.2‰;较高的⁸⁷Sr/⁸⁶ Sr比值（0.709 445～0.713 131）,其平均值为0.710 843,在稀土元素组成上,热液白云石具有典型的Eu正异常的特点,δEu值为1.11～7.46,平均值为2.37。因此,灯影组热液白云石发育。热液活动对储层形成具有积极影响,主要体现在对充填在早期岩溶孔洞和构造裂缝中的白云石产生了溶蚀作用,溶蚀孔中见沥青充填,反映为油气运移通道和聚集空间。因此,热液溶蚀改造作用对我国南方地区震旦系灯影组及下古生界碳酸盐岩储层发育可能具有重要意义,值得加强探索研究。  相似文献   

土库曼斯坦阿姆河盆地卡洛夫-牛津阶储层特征及控制因素分析   总被引：1，自引：0，他引：1  

郑荣才  陈浩如  王强  崔璀  费怀义  徐文礼 《岩石学报》2014,30(3):779-788

土库曼斯坦东北部的阿姆河盆地,是中亚地区最重要的含油气盆地之一。根据钻井岩芯和分析化验资料,确定阿姆河盆地卡洛夫-牛津阶为碳酸盐台地相沉积,具有特征的前缘缓斜坡沉积模式,可划分为蒸发台地、局限台地、开阔台地、台地边缘、前缘缓斜坡和盆地6个相带。其中台内、台地边缘和前缘缓斜坡为储层发育相带,尤以发育于台地边缘、开阔台地和前缘缓斜坡相带中的礁、滩微相最有利于储层发育。沉积微相和岩性对储层类型及物性有直接控制,特点为高能环境条件下沉积的块状礁灰岩和中-厚层状滩相颗粒灰岩以发育原生孔隙保存良好的孔隙型和裂缝-孔隙型储层为主,而较低能环境条件下沉积的(含)颗粒微晶灰岩、隐藻灰岩和泥-微晶灰岩以发育基质岩物性很差的裂缝型储层为主。通过综合分析,认为储层发育受沉积微相、岩性和成岩作用复合控制,以各相带内的礁、滩微相灰岩为高效勘探开发目标的"甜心"位置。  相似文献   

飞来峡水利枢纽库区动态纳污能力计算研究   总被引：1，自引：0，他引：1       下载免费PDF全文

谭超  黄本胜  洪昌红  邱静  胡培 《水文》2014,34(5):51-56

根据飞来峡水利枢纽库区水流及水质特点,选取不同设计流量,建立二维水流水质模型。通过水槽实验,拟合水质衰减系数与流速的关系曲线,以获取模型水质计算参数。研究结果表明:通过概化排污口排污量与混合带长度响应关系计算,确定各排污口混合带长度在1 300~2 500m之间;在90%最枯月、50%最枯月及多年平均流量水文条件下,飞来峡库区干流水域COD纳污能力分别为162 107.7t、199 220.2t及372 104.3t;NH3-N纳污能力分别为2 757.4t、3 408.4t和6 276.4t;飞来峡库湾的纳污能力远小于库区干流水域,库湾COD纳污能力仅相当于干流的25%,NH3-N纳污能力仅相当于干流的5%;飞来峡库区纳污能力年内逐月差异显著,其中汛期(4~9月)纳污能力较大,COD、NH3-N纳污能力约占全年纳污能力的58%,飞来峡库区年内月纳污能力与月平均流量呈现较好的正相关关系。  相似文献   

川西北中二叠统茅口组储层特征及成因     

郝毅  周进高  倪超  辛勇光  厚刚福  陈薇 《四川地质学报》2014,(4):501-504

对四川盆地西北部钻井岩心、露头剖面样品的宏观及微观岩石学特征研究认为,川西北茅口组储层类型主要为生屑灰岩,储集空间主要为生物格架孔、粒间溶孔、粒内溶孔、溶蚀孔洞及裂缝。茅口组储层的发育主要受到沉积微相、古岩溶作用及构造作用等因素控制。其中沉积微相是储层形成的物质基础,古岩溶作用是储层形成的关键因素,而构造裂缝是储层改善及连通的重要因素。  相似文献   

潮汐河口水库中水力充填堤坝结构的渗控关键技术研究     

王生海  邓鹏 《中国勘察设计》2014,(5):66-69

随着近些年水力充填堤坝结构在潮汐河口水库中的应用和发展,渗流控制技术也随之不断完善。本文以上海青草沙水库工程中的北堤工程为例,论述了水力充填堤坝应用在潮汐河口水库中,其渗流控制技术研究分析过程,为类似工程的设计和研究提供了经验和参考。  相似文献   

季节性Kendall检验及其在三门峡水库水质趋势分析中的应用   总被引：4，自引：0，他引：4  

胡国华  唐忠旺  肖翔群 《地理与地理信息科学》2004,20(3):86-88

选择1997—2002年三门峡库区的龙门、潼关和三门峡3个断面的水质监测资料,运用季节性Kendall检验方法分析三门峡水库水质趋势,结果显示：龙门断面,CODMn、NO2-N及Hg的变化趋势不明显,NH3-N呈显著上升趋势,As、Cd和Cu呈显著下降趋势,而Pb则呈高度显著下降趋势;潼关断面,NH3-N、NO2-N和Hg的变化趋势不明显,CODMn呈显著上升趋势,As、Cd和Pb呈显著下降趋势,而Cu则呈高度显著下降趋势;三门峡断面,CODMn、NO2-N、As及Hg的变化趋势不明显,NH3-N污染呈显著上升趋势,Cd呈显著下降趋势,而Cu和Pb则呈高度显著下降趋势。  相似文献   

Comparative application of two mathematical models to predict sedimentation in Yermasoyia Reservoir,Cyprus     

V. Hrissanthou 《水文研究》2006,20(18):3939-3952

The Yermasoyia Reservoir is located northeast of the town of Limassol, Cyprus. The storage capacity of the reservoir is 13·6 × 10⁶ m³. The basin area of the Yermasoyia River, which feeds the reservoir, totals 122·5 km². This study aims to estimate the mean annual deposition amount in the reservoir, which originates from the corresponding basin. For the estimate of the mean annual sediment inflow into the reservoir, two mathematical models are used alternatively. Each model consists of three submodels: a rainfall‐runoff submodel, a soil erosion submodel and a sediment transport submodel for streams. In the first model, the potential evapotranspiration is estimated for the rainfall‐runoff submodel, and the soil erosion submodel of Schmidt and the sediment transport submodel of Yang are used. In the second model, the actual evapotranspiration is estimated for the rainfall‐runoff submodel, and the soil erosion submodel of Poesen and the sediment transport submodel of Van Rijn are used. The deposition amount in the reservoir is estimated by means of the diagram of Brune, which delivers the trap efficiency of the reservoir. Daily rainfall data from three rainfall stations, and daily values of air temperature, relative air humidity and sunlight hours from a meteorological station for four years (1986–89) were available. The computed annual runoff volumes and mean annual soil erosion rate are compared with the respective measurement data. Copyright © 2006 John Wiley & Sons, Ltd.  相似文献