东营凹陷岩性油藏含油性定量预测

隐蔽油气藏已成为渤海湾盆地油气勘探的重点,其中岩性油气藏更是今后增产稳储的重要目标.近几年的勘探实践表明,岩性圈闭的含油性变化较大,其含油性和充满度大小的估算已成为油田勘探决策、井位部署及油田开发过程中不可缺少的重要技术.在地质统计和层次分析的基础上,找出了控制东营凹陷岩性油藏含油性的主要地质因素,并对其定量化,运用多元线性回归方法建立了东营凹陷各构造区带岩性圈闭充满度的数学预测模型.模型可靠性的验证结果表明,80%的岩性圈闭充满度的理论值与实测值吻合较好,说明此种定量预测的方法是可行的.     

Ground water hydrochemical characteristics: seawater intruded area in eastern and southern coast of Laizhou Bay

Seawater intrusion is a special process of groundwater pollution. The contemporary seawater intrusion and buried paleobrine intrusion especially the latter in eastern and southern coasts of Laizhou Bay are the most representative ones in the world [1]. According to the research on seawater intrusion at home and abroad, In-depth studies on change process and mechanism of hydrochemical composition, while ion adsorption and exchange between the permeable stratum and groundwater are studied shall…     

河口、海湾沉积磷在全球变化区域响应研究中的意义

通过探讨海陆交互作用带近代沉积磷的生物地球化学循环过程及与大气圈氧气和二氧化碳等的相关关系 ,综述了用环境生物地球化学的理论和方法研究海陆边缘近代沉积磷随时间的变化规律、赋存形态、与相关元素的耦合关系等生物地球化学特征及其在全球变化区域响应研究中的特殊意义。藉此追溯过去气候和环境变化的驱动因素 ,区分自然因素和人类活动作用的影响 ,揭示河口、海湾近代沉积磷对过去气候和环境变化的指示作用 ,为预测未来区域和全球变化趋势及建立模型提供科学依据。     

福建深沪湾海底古森林遗迹分布区全新世自然环境演变

本文根据福建深沪湾潮间带古森林遗迹分布区的两个钻孔岩芯的粒度、有孔虫、孢粉、古土壤和14C年代等方面的分析测试资料,恢复了该区全新世自然环境演变与海底林生长与掩埋的历史.以油杉为代表的古森林在该区出现于9420aB.P.左右,繁盛于8090～7140aB.P.在7200～6800aB.P.间的中全新世早期,该区气候热暖潮湿,海面不断升高.由于侵蚀基准面的抬高,深沪湾西部的河流发生了加积作用,从而掩埋了该古油杉林.当中全新世中期古海面上升到钻孔所在的位置时,该古森林遭到了灭顶之灾.晚全新世以来,该区一直处于潮间带环境,与今日只有微小的差别.     

黄茅海海域内泥沙淤积范围的确定

根据黄茅海海域底沙样本的中子活化分析示踪泥沙的原始数据,采用模糊数学方法,计算了各样本点间的相关关系,并进行聚类分析,得出了泥沙输移的主要路线,同时通过对沙源泥沙特性的探讨且结合实际情况,选取了作为沙源的泥沙样本.在此基础上,采用均方差最小的方法,计算各沙源对海域内各样本点的贡献,由此可以确认各沙源的淤积范围,从而对本海域内的泥沙来源有了较为全面的认识.     

Simulation of eutrophication and associated occurrence of hypoxic and anoxic condition in a coastal bay in Japan

A probabilistic method of calculating the occurrence of oxygen-depleted water within a combined hydrothermal and water quality model was presented in this paper to investigate the environmental impact of eutrophication on the living resources. The method was applied to an eutrophicated shallow coastal bay in western Japan, where the occurrence of red tides at the water surface and the onset of bottom hypoxic waters are observed every summer. Both meteorology and freshwater inflow contribute to the development of stratification of the bay, thus limiting the dissolved oxygen supply to bottom waters. The resulting hydrodynamics enhances the development of oxygen-depleted bottom waters by transporting organic matter produced by algal blooms to the inner bay, where it decomposes and exerts high SOD. During August, about 60% of the inner bay is hypoxic for prolonged durations and as a result most of the benthic biota and fish die. The method used here is a very useful and informative way to evaluate the spatial and temporal damage and severity caused by hypoxia on living resources. Moreover, the model results agreed very well with the observed hydrodynamics, thermal structure and water quality data of the stratified bay. The model can be used for other lakes and bays where knowledge of temperature and density stratification is important for assessing water quality.     

New Insights in Shallow Gas Generation from Very High Resolution Seismic and Bathymetric Surveys in the Marennes-Oléron Bay, France

Very high resolution seismic profiles, ground-truthed by vibrocores, have revealed the occurrence of kilometre-scale acoustic turbidity in the Marennes-Oléron Bay, France. Such acoustic turbidity is commonly interpreted as gas-charged sediments. Comparison between accurate historical bathymetric data and the present day bathymetry has shown high sediment accretion zones in the study area (locally up to 8 m since 1824). The superimposition of seismic and bathymetric datasets displays a striking correlation between the high sedimentation rate area and the boundaries of the acoustic turbidity, i.e. gas-charged sediments. The key role of sedimentation rates in shallow gas generation in the study area is pointed out. It is also concluded that shallow gas is probably generated at short (decadal to secular) time scales.     

莱州湾环境质量现状与发展趋势研究

本文在大量调查资料的基础上，研究了莱州湾的污染状况及变化趋势，并提出了环境保护对策。     

辽东中部海岸地貌基本特征

根据地貌结构分析和晚更新世海侵沉积层的变位特征,认为辽东中部沿海地貌属缓慢的构造沉降海岸。     

莱州湾南岸滨海湿地的退化及其生态恢复和重建对策

受气候变化，河流断流，海洋灾害，污染，围垦，海水入侵，盐业、养殖业的发展，过度捕捞，过度开发利用水资源，不合理的工程建设等因素的影响，近30多年来莱州湾南岸滨海湿地呈现明显的退化趋势。如自然湿地面积减小、植被退化、人工湿地面积扩大、湿地生物多样性受损、渔业资源衰退等。作者针对导致湿地退化的原因提出了减轻海洋灾害、合理发展盐业和渔业生产、严格控制污染物入海、恢复湿地水文条件以满足湿地生态需水、建设人工芦苇湿地等退化湿地的生态恢复和重建对策。