Rock-fluid interactions in deep overpressured basinal settings of the Central Graben, North Sea: Organic and inorganic considerations

硅质岩系深埋藏成岩作用是沉降沉积盆地中高温高压条件下复杂的动态过程的结果。很明显，我们对这些环境中发生的过程的理解只有在综合分析矿物-水-烃相互作用的情况下才能得到改善。这一做法尚未在区域范围内尝试。我们建议使用石油工业提供的北海中央地堑样品，在盆地演化框架中研究这些现象。储集岩的详细成岩分析与3D盆地建模、成岩建模以及成分动力学和相建模相结合，将允许识别所涉及的主要物理化学过程并量化其影响。早期成岩CO2生成有机质的影响，其对孔隙水pH值和溶质运移能力的影响将考虑使用各种已发表的动力学模型。将讨论文献中讨论的不同成岩假设（开放与封闭流体系统）以及提出的有机-无机相互作用。

Deep burial diagenesis of siliciclastic sequences is the result of complex and dynamic processes occurring under high pressure and temperature conditions in subsiding sedimentary basins. It seems obvious that our understanding of the processes occurring in these settings can only be improved if the mineral-waterhydrocarbon interactions are analyzed in an integrated fashion. This approach has as yet not been attempted on a regional scale. We propose to study these phenomena in a basin evolutionary framework using samples from the Central Graben, North Sea, provided by the petroleum industry. The integration of detailed diagenetic analysis of the reservoir rocks, coupled with 3D basin modeling, diagenetic modeling, and compositional kinetic and phase modeling will allow the identification of the main physical-chemical processes involved and the quantification of their effects. The influence of early diagenetic CO2 generation from organic matter and its influence on pore water pH and solute transport capacity will be taken into account using various published kinetic models. The different diagenetic assumptions discussed in the literature (open vs. closed fluid systems) as well as the proposed organic-inorganic interactions will be addressed.