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901.
902.
903.
蜀南地区飞仙关组的沉积相类型主要有浑水陆棚相与清水陆棚相,东部两者交替发育,中西部则主要为浑水陆棚相。浑水陆棚相以半局限海亚相为主,包括三个微相;清水陆棚相可分为颗粒滩、滩间、潮坪和内缘斜坡等四个亚相,包括若干微相。飞一段全区为清水陆棚相;飞二段全区均为浑水陆棚亚相的泥质半局限海微相;飞三段,西部为浑水陆棚相,东部为清水陆棚相,其间发育灰泥质半局限海微相;飞四段基本为泥质半局限海微相。飞一时,区内中部有一近南北向的台内凹槽,沿凹槽边缘鲕粒滩较发育。研究区以西的康滇古陆和龙门山岛链与华蓥山断裂带控制着区内沉积相展布,当康滇古陆和龙门山岛链构造活跃时全区发育浑水陆棚,华蓥山断裂带活动时东部发育清水陆棚;当康滇古陆、龙门山岛链与华蓥山断裂带构造的活动性都较低时,全区以清水陆棚为主。 相似文献
904.
美国法尔韦油田位于东得克萨斯盆地中心附近。油田发现于1960年,同年投入生产。原始地质储量为4亿桶,至2003年累计产油2.17亿桶。原油具挥发性,接近饱和。主要储层为下白垩统James组礁石灰岩,主要为骨架粒状灰岩/泥粒灰岩和富含双壳类粒泥状灰岩,各岩相的平均孔隙度一般在7%~11%,但平均渗透率在各岩相中不均,最高达(37~44)×10-3"m2。介绍了该油田的勘探史,描述了盆地构造演化史、含油气系统、地层沉积相和储层特征。 相似文献
905.
中国海相油气田勘探实例之五塔中奥陶系大型凝析气田的勘探和发现 总被引:93,自引:2,他引:91
塔中奥陶系碳酸盐岩的勘探始于1989年,直至2005年发现塔中Ⅰ号坡折带奥陶系碳酸盐岩凝析气田,探明加控制石油地质储量1.5×108t(油当量),是我国目前发现的第一个奥陶系生物礁型大油气田。油气的主力产层位于上奥陶统良里塔格组上部,储层为受坡折带控制的陆棚边缘礁滩体石灰岩。油气沿坡折带呈带状展布,为整体含油的大型准层状岩性油气藏。论述了塔中碳酸盐岩大油气田的勘探历程、主要地质特征,以及对海相碳酸盐岩勘探的启示。 相似文献
906.
羌塘盆地油气勘探前景展望 总被引:4,自引:0,他引:4
羌塘盆地为中生代大型的海相残留型构造盆地。盆地的南北缝合带及中央隆起带,宏观上可视为三条构造活动带,其间所夹持的两个相对稳定的地块,特别是南、北坳陷中部的两个复向斜区,是油气勘探的主攻方向。上三叠统—上侏罗统是盆地内的沉积主体,“两坳夹一隆”的古构造格局控制了沉积和烃源层的发育和展布。生物礁、滩多分布在高隆起周缘的碳酸盐岩台地上,发育于各组段中,但以侏罗系布曲组及索瓦组相对集中。盆地内发育有上三叠统肖茶卡组、中侏罗统布曲组和夏里组以及上侏罗统索瓦组四套主要烃源层,估算盆地的总生烃量为9930.92×108t,远景资源量为52.95×108t,具有雄厚的找油物质基础。盆地内发育了四套生储盖组合,其中以侏罗系(组合Ⅲ)布曲组—夏里组亚组合最好,是盆地主要的勘探目的层。应用多种方法综合研究和评价认为,北羌塘坳陷金星湖—东湖—托纳木地区和南羌塘坳陷比洛错东—土门地区是最有利的含油气远景区。 相似文献
907.
The Austrian node of the Natural Resources Satellite Remote Sensing Cloud Service Platform was established in 2016 through a cooperation agreement between the Land Satellite Remote Sensing Application Center(LASAC),Ministry of Natural Resources of the Peoples Republic of China and the University of Vienna,Austria.Under this agreement panchromatic and multi-spectral data of the Chinese ZY-3 satellite are pushed to the server at the University of Vienna for use in education and research.So far,nearly 500 GB of data have been uploaded to the server.This technical note briefly introduces the ZY-3 system and illustrates the implementation of the agreement by the first China-Sat Workshop and several case studies.Some of them are already completed,others are still ongoing.They include a geometric accuracy validation of ZY-3 data,an animated visualization of image quick views on a spherical display to demonstrate the time series of the image coverage for Austria and Laos,and the use of ZY-3 data to study the spread of bark beetle in the province of Lower Austria.An accuracy study of DTMs from ZY-3 stereo data,as well as a land cover analysis and comparison of Austria with ZY-3 and other sensors are still ongoing. 相似文献
908.
Peter Gutteridge 《Geological Journal》1991,26(3):245-269
The Dinantian Edale Basin is located to the north of the Derbyshire carbonate platform and underlies the Upper Carboniferous of the central Pennines. The Edale Basin was thought to be part of a large basin which extended from the Derbyshire carbonate platform to the Askrigg Block. The presence of aggregate grains and ooids in the Alport Borehole suggests that a carbonate platform, possibly located on the Holme structural high, was present underneath the central Pennines. This platform is called the Holme Platform. The Arundian to early Asbian section of the Alport Borehole represents deposition of resedimented shallow-water carbonates with occasional bioturbated periplatform carbonates and basinal shales on the middle part of a carbonate ramp. Volcaniclastic sediments may have been derived from a volcanic centre within the Edale Basin. A change in sedimentation during the mid-Asbian to the deposition of basinal shales and distal carbonate turbidites is attributed to starvation of the basin. This may have been caused by a combination of the development of accretionary rimmed carbonate shelves and the repeated emergence of shelf carbonates deposited on surrounding carbonate platforms. The late Asbian/early Brigantian section of the Edale Borehole is interpreted as a distal equivalent of the ‘Beach Beds’ which outcrop at the north margin of the Derbyshire carbonate platform. The ‘Beach Beds’ represent bioclastic turbidites derived from the Derbyshire carbonate platform. Throughout the Brigantian, sedimentation in the Edale Basin was dominated by the deposition of distal carbonate turbidites and basinal shales. Variation of dip through the Alport Borehole indicates the common occurrence of slumps throughout the sequence and the presence of either an angular unconformity or a fault within the early Brigantian section. 相似文献
909.
David K. Loydell 《Geological Journal》1991,26(3):209-244
The stratigraphical relationships of the upper Aeronian-lower Telychian formations in the Aberystwyth area are examined in the light of a new biostratigraphical subdivision of this interval based on graptolites, in which part of the Monograptus turriculatus Biozone is divided into six subzones and the Stimulograptus halli Biozone is resurrected. In the Aberystwyth area (B.G.S. 1:50 000 Sheet 163 (1984)) there is shown to be greater diachroneity of formational —boundaries than previously recognized. Notably, the Cwmsymlog Formation facies persisted in the northeast of the area far longer than anywhere else, due to the persistence of a bathymetric high into the lower Telychian. Also, the basal beds of the Aberystwyth Grits in the west of the area are shown to be of the same age as the uppermost beds of the Devil's Bridge Formation in the east. Thus for a short period the area was subject to turbiditic incursions from two sources. The degree of diachroneity of the base of the Aberystwyth Grits Formation as a whole is less than previously thought — the oldest beds are approximately one subzone older in the south than in the north. The core of the in the clinal pericline responsible for the crescentic outcrop pattern of the Aberystwyth Grits is demonstrated to lie in the vicinity of Llanrhystud, rather than at Aberarth as previously suggested. Four new graptolite species are described and one new genus is erected. 相似文献
910.