韩江流域规划环境影响评价优化调整研究

该文对广东省韩江流域综合规划进行环境影响评价,从规划布局、实施时序、开发方式、生态保护与社会经济等角度开展优化调整方案,研究结果表明:规划新建的14个梯级中8个梯级取消建设,5个梯级近期开发,1个梯级进一步优化论证后开发;采砂控制区划将10个采砂区列为禁采区.     

中中新世以来南海南部前隆的迁移:来自北康盆地的证据

利用二维地震资料探讨南海南部北康前隆的迁移现象及其对形成油气圈闭的影响。在南沙海域，早中新世不整合（EMU）是一个区域性不整合面，EMU之上的地层可以简单归结为披覆层系和水平层系。披覆层系直接覆盖在EMU上，具有连续薄层的平行地震反射特征，向南东方向加厚，属于悬浮沉积；而水平层系同期充填在低凹处，不断上超和覆盖早期的披覆层系，厚层状，呈不连续或弱反射特征，属于浊积物与悬浮物的混合沉积。通过上超反射终止的迁移和披覆层系的加厚两个特征判断，中中新世以来北康前隆在向上隆升的同时不断向南东方向迁移，反映了南沙海域减薄的陆壳有一个强烈挠曲和均衡反弹过程。前隆的迁移留下了一系列的古潜山，披覆层系和水平层系是很好的盖层，有利于圈闭的形成。     

Multi-level backcalculation algorithm for robust determination of pavement layers parameters

The backcalculation procedure applied to a mechanical characterization of the road pavement is usually limited to an identification of the elastic modulus of each layer only. The remaining parameters of the model are usually set as known, while performing an inverse analysis. Among assumed parameters are thicknesses of the model layers and frequently considered as constants on a homogeneous section of the road. This is an obvious simplification, because sections in general are inhomogeneous, i.e. the thickness of each layer changes slightly along each road section. Thus the precise and possibly nondestructive estimation of the layers thicknesses is very important and crucial in the inverse procedure. Here, a hybrid form of the optimization algorithm, where the condition of a constant thickness does not need to be fulfilled is described. Further on, the objective function is formed as a discrepancy between reference and computed deflection derivative instead of a deflection curve. In consequence, the values of backcalculated parameters are several per cent more precise compared to a standard procedure. Whenever the thickness of the asphalt layer of the pavement structure cannot be assumed a priori as a constant, the proposed here method appears to be necessary if one does not want to perform costly and destructive in situ drilling tests.     

The influence of bitumen on reservoir properties and hydrocarbon accumulation in the Santai Area of the Junggar Basin,North Western China

Bitumen's influence on reservoir properties and hydrocarbon accumulation in Santai area was studied by experiment measures and geochemical evidences. The porosity and permeability of the sandstones containing bitumen increased significantly by dissolving experiments, implying that bitumen strongly influences the reservoir properties. The analysis reveals that there were two stages of hydrocarbon accumulation. In the first stage oil migrated into coarse-grained sandstone and then degraded to bitumen, which deteriorated the reservoir properties. The second stage oil had to migrate into fine-grained sandstones, or the residual pores of the bitumen-containing coarse-grained sandstone. Exploration in this area should avoid the bitumen distribution zone.     

新型城镇化视角下的流域文化保护路径研究——以辽河流域沈阳段为例

以流域为空间界定,以城乡统筹为研究背景,结合辽河流域文化的保护与发展实践,试图探索出打破行政区域概念的、立足于城乡发展的流域文化保护策略和方法,以此树立和强调"流域型文化遗产"的保护观念。     

准噶尔盆地南缘三工河组层序地层与沉积特征

本文应用层序地层学方法,通过钻井、测井、古生物、野外露头剖面、勘探线等的分析,将准噶尔盆地南缘侏罗系中下统划分为1个三级层序,并以地层叠置样式、岩性、岩相的变化细分出低位、湖侵和高位体系域,在连井剖面层序对比的基础上建立了研究区三工河组层序地层格架。通过钻井、测井、古生物、野外露头剖面等资料的分析识别出侏罗系中下统主要发育扇三角洲、三角洲、湖泊、沼泽等主要相类型,并首次系统分析了准噶尔盆地南缘三工河组沉积相的构成、演化与分布规律,这对于指导研究区煤炭、油气的勘探具有重要意义。     

双鸭山盆地含煤性及煤质特征

简要介绍了双鸭山盆地的煤系特征、主要煤层分布、煤岩煤质特征,以及煤变质作用和煤种的分布,阐述了双鸭山盆地的含煤性和煤质特征。     

霍林河煤田聚煤中心演化的研究

从霍林河盆地聚煤中心的角度,论述了霍林河煤田聚煤中心的演化,从时间上和空间上总结了4个聚煤中心的演化规律,为我们确立新的勘探区提供了技术支持。     

局部高位入渗对渗透池入渗速率的影响

含水层中的弱透水层和回灌过程中的堵塞问题是影响地下水人工回灌工程效率和寿命的关键问题.本文通过室内实验,模拟了自然状态地表覆盖有弱透水层的情况下,正常回灌、局部开挖回填砂砾石,以及设计的局部高位入渗方法对渗透池入渗速率的影响.实验证明,实践中通常采用的局部开挖回填砂砾石的方法对入渗效率的提高是有效的,但是由于回灌水源在...