共查询到18条相似文献，搜索用时 109 毫秒
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随着勘探开发程度的不断升高,西湖凹陷保俶斜坡带平北地区中上始新统平湖组构造―岩性复合油气藏显示出较大的勘探潜力。然而,该区构造―岩性复合油气藏勘探基础薄弱,加之构造、沉积条件复杂,砂体展布规律不清,阻碍了该区的勘探进程。本文基于三维地震及钻井等资料,从构造、层序及沉积3个方面对砂体分布的控制因素进行分析,认为构造古地貌及可容纳空间控制地层厚度及沉积体规模;同沉积断裂坡折带控制砂体的展布;体系域类型控制砂体的时空配置,沉积微相类型控制砂体的储集物性。综合分析控砂因素认为:断陷期的平下下段和平下上段是构造―岩性圈闭发育的主要层段,勘探方向为低位体系域控沉积断层下降盘的地势低洼汇砂区,而平中上段有利的岩性圈闭勘探区为三角洲前缘砂地比低或三角洲前端发育的潮汐砂脊带。 相似文献
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Barra Velha组为研究区主力含油层位,区域古地貌控制了沉积相带和储层的分布。同时,古地貌的起伏影响同生期的成岩作用,也间接控制了储层的品质。通过岩心、测井和地震资料综合分析,综合利用印模法、残余厚度法,结合压实校正进行不同岩性的厚度恢复,对目标区块Barra Velha组沉积期的古地貌进行恢复,平面上将古地貌划分为古构造深水区、古构造斜坡—洼地区、古构造次高地及古构造高地。在古地貌的平面分区特征分析的基础上,结合沉积特征和同生期的暴露环境,进行沉积和储层研究,识别研究区优质储层发育区。 相似文献
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陈玲 《海洋地质与第四纪地质》2008,28(5)
中建南盆地是位于南海西部陆缘的大型新生代沉积盆地。调查资料表明,盆地面积超过11×104km2,沉积厚度达8500m,局部构造发育,油气前景良好。在对盆地大量多道地震资料综合分析解释的基础上,研究了盆地局部构造的圈闭类型、分布特征和发育史。盆地的局部构造主要分为构造圈闭、地层圈闭和复合型圈闭。早期发育伸展构造样式,伴生以张性为主的局部构造圈闭;晚期受走滑应力的改造,发育花状张扭或压扭性构造;特定的构造和沉积环境则造就了地层和复合型圈闭构造。 相似文献
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《海洋地质与第四纪地质》2017,(2)
为确定南海西部的中—西沙地块是否存在前新生代地层与构造,对研究区内多道反射地震剖面资料进行了地层-构造解释,并结合围区钻井、拖网等岩石地层资料,在研究区北部发现了前新生代地层-构造变形形迹。运用回剥法、去断层恢复法和地质反序法对前新生代地层的构造变形进行了古恢复。结果表明,研究区的地层可划分为上、中、下三套构造层,其中属于前新生界的下构造层可见褶皱、逆冲等挤压构造样式,前新生代末期,其构造形态表现为一系列连续的宽缓褶皱,结合断层逆冲推覆方向可判断其主要挤压应力来自于东南方向,并推测该挤压作用与古南海的扩张有关。 相似文献
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南海北部珠江口盆地恩平凹陷大面积三维地震资料揭示了新近系类型丰富的砂体，在古珠江三角洲演化及相带迁移的控制下形成了较好的岩性圈闭发育条件。近年来，凹陷内发现的多个构造-岩性圈闭均与河道砂体相关。但在已有的层序地层划分方案中，河道砂体的成因、分类和展布特征与体系域的耦合关系差，砂体发育规律不明，制约了岩性圈闭的勘探效果。基于沉积层序理论，利用大范围井震资料，系统厘定了恩平凹陷珠江组一段-韩江组六段的高精度层序地层框架，并在此基础上开展了精细的三维地震沉积学解剖。分析结果显示，目的层发育的大型辫状河道、小型曲流河道和中型曲流河道，分别与低位、海侵和高位等特定体系域具有密切的耦合发育关系，进而建立了层序格架对河道砂体的有效预测模式，系统指明了凹陷不同区域、不同体系域内岩性圈闭的发育潜力及有利区。本文相关认识对其他海相三角洲盆地岩性圈闭勘探具有启示作用。 相似文献
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北部湾盆地涠西南凹陷碳酸盐岩潜山储层特征与主控因素分析 总被引：1，自引：1，他引：0
北部湾盆地涠西南凹陷已发现多个碳酸盐岩潜山油田和含油构造，运用岩心、薄片、钻井、测井、地震等资料，对石炭系碳酸盐岩储层特征及主控因素进行了综合分析。研究认为涠西南凹陷碳酸盐潜山主要分布在一号断裂带至二号断裂带附近，其中一号断裂带碳酸盐岩潜山主要为上石炭统黄龙组，岩性为浅灰色灰岩、白云质灰岩、白云岩互层，沉积微相以碳酸盐台地-台缘生屑灰岩滩为主，发育裂缝、溶孔、溶洞等储集空间；二号断裂带碳酸盐岩潜山主要为下石炭统下部石磴子段、孟公拗段，岩性为灰色、深灰色灰岩，沉积微相以台内灰岩滩沉积和台缘生屑灰岩滩为主，发育良好的裂缝型储集层。碳酸盐岩潜山储层发育程度主要受碳酸盐岩沉积环境、地下水活动、古构造应力以及潜山上覆地层岩性等内因和外因诸多因素影响，在这些因素共同作用下，涠西南凹陷碳酸盐岩潜山发育孔隙、裂缝、溶洞等多种储集空间，具备良好的储集条件。 相似文献
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《海洋地质前沿》2017,(10)
琼东南盆地陵水凹陷构造演化及其对深水大气田形成的控制作用成为深水区研究的热点。利用钻井地质、地震勘探资料,运用层序地层学、构造解析方法,认识了陵水凹陷的构造动力学机制和构造变形;探讨了陵水凹陷构造演化及其对深水大气田形成的控制作用;提出了陵水凹陷经历了古新世—始新世断陷、渐新世坳—断、早中新世断—坳和中中新世—更新世坳陷(深水盆地)4期构造演化阶段的新认识,并认为构造演化控制了深水大气田的形成。(1)古新世—始新世断陷、渐新世坳—断作用分别控制了湖相、海陆过渡相—海相烃源岩分布,中中新世—第四纪坳陷作用拓宽了烃源岩生气时窗;(2)渐新世坳—断作用控制发育了扇三角洲储层,中中新世—更新世坳陷作用控制发育了深水限制型、非限制型碎屑岩储层和碳酸盐岩生物礁储层;(3)渐新世坳—断演化阶段以走滑—伸展构造变形为主,控制发育了断鼻、断背斜圈闭,中中新世—更新世坳陷作用控制发育了深水限制型重力流水道砂岩性圈闭群、非限制型盆底扇岩性圈闭和生物礁地层圈闭;(4)渐新统、中中新统地层超压产生断裂/裂隙,构成了良好的天然气输导体系。 相似文献
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The sedimentary sequence in the Western Black Sea region of Turkey both onshore and offshore offers many possibilities for different hydrocarbon plays. This study presents a new play, which considers Carboniferous coals and shales as source beds, Cretaceous sandstones as reservoirs and Cretaceous shales and marls as seal rocks. The evaluation of this play is performed using the petroleum system approach. Results suggest that the coals and shales have a good to very good source rock potential for gas, that the Cretaceous synrift sandstones are good reservoirs. On the other hand, the sealing efficiency of respective Cretaceous units is assumed to be sufficient based on their lithological (shales and carbonaceous marls) characteristics. Stratigraphic traps, which formed by transgression and by onlap on paleohighs, were sealed and potentially available at 97 million years (ma) before present. Structural traps related to Early Cretaceous extension were also sealed around 97 ma. On the contrary, traps formed by folding and thrusting during the Alpine orogeny only formed during the last 50 ma. The timing of gas generation and migration was determined by one and two-dimensional basin modeling in one well and along a cross-section. The modeling results indicated that during the period between 90 and 42 ma, large volumes of gas were generated from the Carboniferous source rocks. Comparison with the age of stratigraphic and structural traps showed that stratigraphic and normal fault traps were potentially available for the entire volume of generated gas and that the other structural traps associated with Alpine orogeny were available only for gas generated and/or re-migrated during the last 50 ma. The evaluation of this new play results in the conclusion, that the Western Black Sea region is worthy of further exploration for conventional accumulations of thermogenic gas. 相似文献
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根据板东构造板东4井等长兴组钻探资料，对长兴组的生物礁进行了研究。研究表明板东构造长兴组储集岩有生物（屑）泥晶灰岩-含生物（屑）泥晶灰岩、礁灰岩和白云岩。综合储集岩物性特征、区域钻、测井资料及野外剖面，总结了生物礁的形成与演化模式及模式各部位所对应的岩性和物性。通过地震响应特征、反演等技术建立了长兴组储层识别模式，利用对应速度、Landmark属性提取的储层有效厚度经计算机网格化编制出了长兴组储层厚度分布预测图，与钻测井厚度对比，证实板东4井生物礁为点礁。 相似文献
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Carbonate karst is one of the research highlights in the field of carbonate reservoir geology. Here, we report on a new type of karst formed in the Middle Permian Maokou Formation, southern Sichuan Basin, SW China, i.e., inland facies-controlled eogenetic karst, which is different from the previously defined telogenetic karst. This karst is eogenetic as the formation was buried at shallow depths prior to being subaerially exposed for a period of 7–8 Myr, in the paleo-continental region of the Upper Yangtze Uplift. Subaerial exposure may have been caused by a sea level regression during the Tungwu Orogeny, which gave rise to a depositional hiatus over a broad area. The top of the Maokou Formation is commonly marked by a weathered crust and an unconformable relationship with overlying layers. Below the surface, the Maokou Formation contains sediments deposited by an underground drainage. The geological setting can be inferred from an inland karst far from coastline. The subsurface karst interval consists mainly of coarse-grained limestone and micrite, with the former occurring in shoal facies deposited in a high-energy depositional environment, and the latter in non-shoal facies deposited in a low-energy environment. Both of them were interbedded with in variable thicknesses. The coarse-grained limestone layers with high porosity and permeability acted as inception horizons, more favourable for the development of karst than the micritic layers with low porosity and permeability. Therefore, in places where both coarse-grained limestone and micrite are present, the karst is considered to be facies-controlled. The primary permeability of the coarse-grained limestone, combined with the permeability provided by faults and fractures, provides sufficient channels for karst water. Formation of the karst system was characterized by contemporaneous development at multiple levels, as controlled by the stratigraphic position of coarse-grained shoal facies. The karst reservoir therefore developed in both karst highland and karst transitional zone (area between the karst highland and karst basin). According to this model of karstification, hydrocarbon exploration should focus on karst highlands located on palaeohighs and in synclines located far from fault zones. 相似文献
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The Lower Cretaceous Knurr Sandstone deposited along the southern slope of Loppa High and overlain by the Kolje and Kolmule seals forms an attractive play in the Hammerfest Basin of the Barents Sea. Late Jurassic organic-rich Hekkingen shale directly underlies the Knurr Sandstone and acts as a source to provide effective charge. Three wells, 7120/2-2, 7122/2-1 and 7120/1-2, have proven the Knurr-Kolje play in structural traps, with an oil discovery in 7120/1-2. Prospectivity related to stratigraphic traps is, however, highly under-explored.In order to document and map the reservoir distribution and stratigraphic-trap fairway, the Lower Cretaceous sedimentary package containing the Knurr Sandstone is divided into a number of depositional sequences and systems tracts using key regional seismic profiles calibrated with logs. Mapping of the key surfaces bounding the Knurr sandstone has been carried out using all the seismic vintages available from Norwegian Petroleum Directorate (NPD).The thick massive nature of the sandstone (123 m in well 7122/2-1), sedimentary features characteristic of gravity flow deposits, high-resolution internal seismic reflections and stratal geometries (truncations and lapout patterns), and sequence stratigraphic position of the Knurr Sandstone on seismic profiles confirm that the lobes identified on the seismic section are gravity driven base of the slope lobes. These Knurr lobes and slope aprons were formed as a result of uplift of the Loppa paleo-high in the Late Jurassic to Early Cretaceous times which caused subaerial exposure and incision. The characteristic mounded, lobate geometry evident on the seismic can be mapped along the toe-of-slope and records multiple stacked lobes fed by multiple feeder canyons. Lateral partitioning and separation of the lobes along the toe-of-slope could potentially create stratigraphic traps. The existing 2D seismic coverage is, however, not sufficient to capture lateral stratigraphic heterogeneity to identify stratigraphic traps. 3D seismic coverage with optimum acquisition parameters (high spatial and vertical resolution, appropriate seismic frequency and fold, long offsets and original amplitudes preserved) can allow for the reconstruction of 3D geomorphologic elements to de-risk potential stratigraphic traps prior to exploratory drilling. 相似文献
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在对构造演化、成藏要素、油源对比、成藏期次分析的基础上,结合Trinity油气运移成藏模拟分析软件对锦州25—1油田的油气运聚模拟研究,分析了形成锦州25—1油田的成藏主控因素,建立了其成藏模式,指出了该地区有利勘探方向。模拟分析结果表明,锦州25—1构造是辽西凹陷沙三段烃源岩生成油气运聚的有利指向区,而优良成藏要素的优势时空配置则是形成锦州25—1油田的关键因素。其成藏模式为：辽西凹陷沙三段烃源岩在东下段时期进入了大量生排烃期,生成的油气为一期充注,充注时间发生在东营组末期,沿东下段时期强烈构造运动伴生的断裂系统、沙二段广泛发育的砂体、沙二段与沙三段之间大型不整合面以及古构造脊所构成的疏导体系运移至沙二段圈闭成藏,而沙三段砂体则可以近源优势成藏。辽西凹陷西斜坡、凹中隆以及古构造脊是今后较为有利的勘探区域。 相似文献
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琼东南盆地深水区主要构造因素与成盆机制分析-地震解释与物理模拟实验 总被引：2，自引：1，他引：1
Located at the northwest continental slope of the South China Sea, the Qiongdongnan Basin bears valley-shaped bathymetry deepening toward east. It is separated from the Yinggehai Basin through NW-trend... 相似文献
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利用天气学诊断分析方法，结合气象卫星云图、多普勒雷达回波、总能量场和中尺度自动气象站记录资料等，分析0601号强台风“珍珠”路径变化的原因以及逐时降水动态变化特点，并探讨了台风影响过程中强降水的主要成因．指出副高、西风槽、高能区对台风运动的影响；台风中心降水和外围降水强弱有反相关的关系，降水较集中在台风路径的左侧；台风“珍珠”登陆前持续加强和对流强烈发展所形成的深厚系统是出现强降水的重要基础，在卫星云图上密实的螺旋结构和中尺度对流云团的生成是台风云带中出现强降水的显著特征，而特定区域地形的多方面影响是降水幅度增加的原因． 相似文献