Failure to find hydrocarbon prospects in the Solway Basin region has resulted in a lack of research into the local Sherwood Sandstone Group petrography, reservoir quality and depositional history compared to the analogous southern reservoirs in the EISB which will be utilized for carbon storage. A detailed petrographic study is presented which aims to understand if the Solway Firth could have similar utility. The Permo–Triassic Sherwood Sandstone Group is believed to be deposited in depocentres connected during the Early Triassic by the extensive ‘Budleighensis’ fluvial system. Here, the Solway and Carlisle basins are proposed as terminal sites for this endorheic system, with the Lower Triassic Annan Sandstone Formation ascribed to the distal region of a fluvial distributary zone and the overlying Kirklinton Sandstone Formation thought to mark a transition to a basinal zone, depositing aeolian sandstones and locally associated playa lake facies. Fluid inclusion, stable isotope burial history modelling and field observations have been used to assess the relative timing and importance of different diagenetic cements. Early diagenetic cements include grain-rimming haematite and patchy calcite cement, especially in the Annan Sandstone Formation. Later burial diagenesis sees further calcite cement, quartz overgrowths and, restricted to the Kirklinton Sandstone Formation, ferroan dolomite. Porosity and permeability show significant differences between fluvial Annan and aeolian Kirklinton facies associations. Despite the finer grain size, a reservoir with excellent porosity and permeability as well as no hydrocarbon charging or legacy hydrocarbon extraction is persevered, suggesting the Solway Basin could be a secure CO₂ storage site.

This article is part of the Energy Geoscience Series available at https://www.lyellcollection.org/cc/energy-geoscience-series

Supplementary material: An overview of the primary and secondary data collected and utilised in this study, as well as raw data values are available at https://doi.org/10.6084/m9.figshare.c.5906677

与将用于碳储存的 EISB 中类似的南部储层相比，未能在 Solway 盆地地区找到碳氢化合物前景导致缺乏对当地舍伍德砂岩组岩相学、储层质量和沉积历史的研究。提出了一项详细的岩相学研究，旨在了解 Solway Firth 是否具有类似的效用。二叠纪-三叠纪舍伍德砂岩群被认为沉积在早三叠世由广​​泛的“Budleighensis”河流系统连接的沉积中心。在这里，Solway 和 Carlisle 盆地被提议作为这个内流系统的终点站，下三叠统安南砂岩组属于河流分流带的远端区域，而上覆的柯克林顿砂岩组被认为标志着向盆地带的过渡，沉积了风成砂岩和当地相关的普拉亚湖相。流体包裹体、稳定同位素埋藏历史模型和现场观测已被用于评估不同成岩胶结物的相对时间和重要性。早期成岩胶结物包括粒边赤铁矿和片状方解石胶结物，特别是在安南砂岩组中。后期埋藏成岩作用进一步看到方解石胶结物、石英过度生长，以及仅限于柯克林顿砂岩组的铁质白云岩。孔隙度和渗透率显示河流安南和风成柯克林顿相组合之间存在显着差异。₂储存地点。

本文是能源地球科学系列的一部分，可在 https://www.lyellcollection.org/cc/energy-geoscience-series

补充材料：本研究中收集和使用的主要和次要数据的概述以及原始数据值可在 https://doi.org/10.6084/m9.figshare.c.5906677 获得