探井油层地球化学检测及实践

以辽河盆地滩海地区海南构造上新探井海南8井为实例,详细阐述了利用储层沥青饱和烃色谱特征、储层沥青含量和族组成特征检测油层和预测原油物理性质的地球化学方法,达到了在钻探过程中经济、快速地发现油层的目的,这一方法具有耗时少、预测精度高和能在钻井过程中及时进行的特点,具有较高的推广应用价值。     

论地球化学外能与内能的转换

岩石在地表条件下具有q值增大规律。岩浆岩和变质岩在地表条件下,吸收太阳等宇宙能转化成沉积岩;在地壳深处,沉积岩释放这些能量转化成岩浆岩或变质岩。能量的上述转换,是通过内生的低晶格能矿物与外生的高晶格能矿物负载者实现的;是通过硅、铝主导控制元素,以及氧、钠、钾、钙、镁和铁等实现的。外能补充内能并通过内能起作用,从而成为改造地球面貌的宏伟运动。     

A Bayesian statistical model for end member analysis of sediment geochemistry, incorporating spatial dependences

Summary.  An important problem in the management of water supplies is identifying the sources of sediment. The paper develops a Bayesian approach, utilizing an end member model, to estimate the proportion of various sources of sediments in samples taken from a dam. This approach not only allows for the incorporation of prior knowledge about the geochemical compositions of the sources (or end members) but also allows for correlation between spatially contiguous samples and the prediction of the sediment's composition at unsampled locations. Sediments that were sampled from the North Pine Dam in south-east Queensland, Australia, are analysed to illustrate the approach.