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透镜体砂岩油藏相控建模研究
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作者 陈梦思 张浩 《能源与环保》 2018年第11期119-123,129,共6页
透镜体砂岩油藏是指由同时沉积的泥岩所包围的、完全充满着油气或部分充满油气的断续条带状砂体或透镜状砂体构成的。砂岩透镜体的成藏及其孔隙度、渗透率等的变化都与岩石的形成过程相关。针对砂岩透镜体油藏的非均质性严重、相变快等... 透镜体砂岩油藏是指由同时沉积的泥岩所包围的、完全充满着油气或部分充满油气的断续条带状砂体或透镜状砂体构成的。砂岩透镜体的成藏及其孔隙度、渗透率等的变化都与岩石的形成过程相关。针对砂岩透镜体油藏的非均质性严重、相变快等特点,采用相控建模软件,结合确定建模与随机建模的方法,建立出油藏的构造模型、沉积相模型参数分布模型。根据结果可以看出,沉积相概率分布与井沉积相基本符合,储层的三维模型垂向砂体识别精度相对较高,在与井栅状图对比修改之后总体的符合程度很高。以沉积相作为约束条件时,渗透率与孔隙度的正态变化图形与标准正态分布曲线相似程度较高;拟合出的渗透率、孔隙度及净毛比的图形与井栅状图相互对比修改后总体符合程度高,为油藏的后续开发奠定了基础。 展开更多
关键词 透镜体砂岩油藏 相控建模 沉积微相 参数分市
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Suburbanization and Subcentering of Population in Beijing Metropolitan Area:A Nonparametric Analysis 被引量:3
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作者 SUN Tieshan HAN Zhenhai +1 位作者 WANG Lanlan LI Guoping 《Chinese Geographical Science》 SCIE CSCD 2012年第4期472-482,共11页
This study focuses on the suburbanization and subcentering of population and examines the nature of spatial restructuring in terms of the population distribution in the Beijing metropolitan area.Instead of the classic... This study focuses on the suburbanization and subcentering of population and examines the nature of spatial restructuring in terms of the population distribution in the Beijing metropolitan area.Instead of the classic density function approach,we employ the nonparametric analysis to characterize the spatial pattern of population densities in the Beijing metropolitan area and identify the suburban subcenters.Our findings suggest that the population has spread with rapid urban growth in the Beijing metropolitan area,and the compact urban form has been replaced by a more dispersed polycentric spatial distribution.However,compared with the decentralization of western cities,the spatial extent of the decentralization of population in the Beijing metropolitan area is quite limited.The rapid growth of population in the near suburbs has expedited the sprawl of the central city,with a larger central agglomeration of population dominating the metropolitan area.In this sense,the spatial pattern of the Beijing metropolitan area is still characterized by the continuous compactness.However,our findings do provide the evidence that the city has been turning to a polycentric structure.We find significant population subcenters have emerged in the suburbs of Beijing since the 1980s.But the polycentricity emerged in the Beijing metropolitan area is very different by nature from that observed in Western cities.The subcenters emerged are adherent to the development scheme planned for the city,so it can be referred to as the so called 'planned polycentricity'. 展开更多
关键词 SUBURBANIZATION population subcenters POLYCENTRICITY urban spatial structure Beijing metropolitan area
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