Chloride removal from wastewater by thermally treated hydrotalcite     

《中国地球化学学报》2006,25(B08):255-256

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Evaluation of the Reduction in Uncertainty Obtained by Conditioning a 3D Stochastic Channel to Multiwell Pressure Data     

Fengjun Zhang  Albert C. Reynolds  Dean S. Oliver 《Mathematical Geology》2002,34(6):715-742

A stochastic channel embedded in a background facies is conditioned to data observed at wells. The background facies is a fixed rectangular box. The model parameters consist of geometric parameters that describe the shape, size, and location of the channel, and permeability and porosity in the channel and nonchannel facies. We extend methodology previously developed to condition a stochastic channel to well-test pressure data, and well observations of the channel thickness and the depth of the top of the channel. The main objective of this work is to characterize the reduction in uncertainty in channel model parameters and predicted reservoir performance that can be achieved by conditioning to well-test pressure data at one or more wells. Multiple conditional realizations of the geometric parameters and rock properties are generated to evaluate the uncertainty in model parameters. The ensemble of predictions of reservoir performance generated from the suite of realizations provides a Monte Carlo estimate of the uncertainty in future performance predictions. In addition, we provide some insight on how prior variances, data measurement errors, and sensitivity coefficients interact to determine the reduction in model parameters obtained by conditioning to pressure data and examine the value of active and observation well data in resolving model parameters.  相似文献   

Quantitative analysis of variations in depositional sequence thickness from submarine channel levees   总被引：2，自引：0，他引：2  

Kenneth I. Skene  David J. W. Piper†  Paul S. Hill 《Sedimentology》2002,49(6):1411-1430

Abstract Thickness variations across‐levee and downchannel in acoustically defined depositional sequences from six submarine channel‐levee systems show consistent and quantifiable patterns. The thickness of depositional sequences perpendicular to the channel trend, i.e. across the levee, decreases exponentially, as characterized by a spatial decay constant, k. Similarly, the thickness of sediment at the levee crest decreases exponentially down the upper reaches of submarine channels and can be characterized by a second spatial decay constant, λ. The inverse of these decay constants has units of length and defines depositional length scales such that k^?1 is a measure of levee width and λ^?1 is a measure of levee length. Quantification of levee architecture in this way allowed investigation of relationships between levee architecture and channel dimensions. It was found that these measures of levee e‐folding width and levee e‐folding length are directly related to channel width and relief. The dimensions of channels and levees are thus intimately related, thereby limiting the range of potential channel‐levee morphologies, regardless of allocyclic forcing. A simple sediment budget model relates the product of the levee e‐folding width and e‐folding length to through‐channel volume discharge. A classification system based on the quantitative downchannel behaviour of levee architecture allows identification of a ‘mid‐channel’ reach, where sediment is passively transferred from the through‐channel flow to the levees as an overspilling flow. Downstream from this reach, the channel gradually looses its control on guiding turbidity currents, and the resulting flow can be considered as an unconfined or spreading flow.  相似文献   

氯化钠浮选剂概述   总被引：2，自引：0，他引：2       下载免费PDF全文

王爱丽  张全有  李海民 《盐湖研究》2003,11(4):42-46

综述了各类氯化钠浮选剂对氯化钠的浮选。并对各类浮选剂的浮选性能进行了比较。  相似文献   

西湖凹陷陆盆冲积体系河道演变规律探讨     

陈琳琳  胡佳庆  白洁 《上海国土资源》2003,(1):40-44

西湖凹陷渐新统一中新统陆盆沉积发育了类型丰富的河道沉积，本文根据陆盆充填机制对盆地演化各阶段的控制作用，从沉积层序、沉积构造、岩性组合特征诸方面探讨了盆地演化过程的河道变迁特点。  相似文献   

VORTEX FLOW FIELD IN A SCOUR HOLE AROUND ABUTMENTS     

Abdul Karim BARBHUIYA  Subhasish DEY 《国际泥沙研究》2003,18(4)

The three-dimensional flow field in a scour hole around different abutments under a clear water regime was experimentally measured in a laboratory flume, using the Acoustic Doppler Velocimeter (ADV). Three types of abutments used in the experiments were vertical-wall (rectangular section), 45° wing-wall (45° polygonal section) and semicircular. The three-dimensional time-averaged velocity components were detected at different vertical planes for vertical-wall abutment and azimuthal planes for wing-wall and semicircular abutments. The velocity components were also measured at different horizontal planes. In the upstream, presentations of flow field through vector plots at vertical / azimuthal and horizontal planes show the existence of a primary vortex associated with the downflow inside the scour hole. On the other hand, in the downstream, the flow field shows a reversed flow near the abutments having a subsequent recovery with a passage of flow as a part of the main flow. The data presented in this p  相似文献   

Mid‐Holocene sub‐blanket‐peat alluvia and sediment sources in the upper Liffey valley,Co. Wicklow,Ireland     

Martin Thorp  Peter Glanville 《地球表面变化过程与地形》2003,28(9):1013-1024

A recently exposed section across a ?rst‐order valley buried beneath the regional blanket peat on hillside slopes in the upper Liffey valley, Co. Wicklow, is described. The section shows two alluvia within a shallow valley form underlain by an extensive boulder and stone line over regional till and weathered granite. ¹⁴C dates from wood in the alluvia indicate the older alluvium to have formed between 4324 ± 53 BP and 4126 ± 45 BP and the younger between 3217 ± 53 BP and 2975 ± 53 BP . The basal layer of the overlying peat yielded a date of 2208 ± 61 BP . The younger alluvium shows the effects of soil paludi?cation prior to the peat expansion. Dated pollen analyses elsewhere in the upper catchment con?rm the spread of blanket peat over most areas above 350 m after 4000–3600 BP . The buried valley was contributing sediments to the mid‐Holocene ?oodplains in the upper Liffey valley prior to the extension of blanket peat over the catchment after which sediment yields from it and the other catchment slopes declined. Copyright © 2003 John Wiley & Sons, Ltd.  相似文献   

酒店气象专用电视频道技术方案     

郑虹晖  尹群  翁锦辉 《气象研究与应用》2003,24(3):50-52

阐述了酒店气象专用电视频道的工作原理,同时还推荐了本系统软硬件具体的配置,最后对专用系统软件的工作流程及其使用方法进行了详细的说明。  相似文献   

无水氯化镍及芳烃基二膦酸四乙酯的制备          下载免费PDF全文

董亚萍 《盐湖研究》1997,5(2):57-63

1，4—二溴苯，4，4’—二溴联苯、4，4’—二溴三联和亚磷酸三乙酯在催化剂无氯化镍催化下，干燥氮气保护．反应得到相应的有机二磷酸四乙酯。  相似文献   

河流深槽沉积体与油气的关系——以辽河坳陷大25井区为例     

陈振岩  李军生  闫火  张戈  祝丽玲  陈峰  季东民 《沉积学报》1996,(3)

河流深槽沉积体是河流沉积的一种特殊沉积体。辽河坳陷第三纪断裂活动强烈，火山岩广泛分布，形成了独特的地貌条件，具备形成河流深槽沉积体的地质条件。本文以辽河坳陷东部凹陷大２５井区为例，对河流深槽沉积体的成因及特征进行探讨，证实了大２５井区巨厚砂砾岩沉积是河流在火山岩古地形的限制下发生急转弯，在其变曲河段的深槽中沉积的深槽沉积体。该沉积体中发育良好的储集空间，有利于油气储集。该类储集体的发现，丰富了辽河坳陷的储层类型，为油气勘探提供了新的领域。  相似文献