Geology of the Upper Jurassic to Lower Cretaceous geothermal aquifers in the West Netherlands Basin - an overview
Geology of the Upper Jurassic to Lower Cretaceous geothermal aquifers in the West Netherlands Basin - an overview
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西荷兰盆地上侏罗统至下白垩统地热含水层的地质 - 概述
DOI：
10.1017/njg.2020.1
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Willems C
中科院分区：
文献类型：
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作者：
Willems C
在过去的10年里，成熟的碳氢化合物区西荷兰盆地的地热开发迅速扩大。自20世纪50年代以来，已生产天然气和石油的上侏罗纪至下白垩统地层成为地热开发的目标。广泛的公开地下数据，包括地震勘测、数百口油气威尔斯井的几个岩心和测井记录，加上经过几十年的油气开采对地质的了解，促进了地热开采。虽然第一个地热项目证明了可渗透的上侏罗纪到下白垩纪砂岩适合地热生产，但它们也清楚地表明，含水层地质的许多细节尚未完全了解。由于同构造沉积作用，整个盆地的含水层结构差异很大。地堑断块，包含地热目标经历了不同的构造历史相比，地垒和弹出结构，主机的油气田，大多数地下数据的来源。准确预测含水层的连续性和厚度是有效部署地热井的先决条件，其目的是增加热量回收，同时避免早期冷水突破的风险。潜在的可回收热量和目前的挑战，以加强进一步扩大热开采从这个盆地是显而易见的。本文概述了目前对上侏罗纪至下白垩纪地层含水层地质的认识和不确定性，并讨论了区域沉积含水层结构的新层序地层更新。
In the past 10 years the mature hydrocarbon province the West Netherlands Basin has hosted rapidly expanding geothermal development. Upper Jurassic to Lower Cretaceous strata from which gas and oil had been produced since the 1950s became targets for geothermal exploitation. The extensive publicly available subsurface data including seismic surveys, several cores and logs from hundreds of hydrocarbon wells, combined with understanding of the geology after decades of hydrocarbon exploitation, facilitated the offtake of geothermal exploitation. Whilst the first geothermal projects proved the suitability of the permeable Upper Jurassic to Lower Cretaceous sandstones for geothermal heat production, they also made clear that much detail of the aquifer geology is not yet fully understood. The aquifer architecture varies significantly across the basin because of the syn-tectonic sedimentation. The graben fault blocks that contain the geothermal targets experienced a different tectonic history compared to the horst and pop-up structures that host the hydrocarbon fields from which most subsurface data are derived. Accurate prediction of the continuity and thickness of aquifers is a prerequisite for efficient geothermal well deployment that aims at increasing heat recovery while avoiding the risk of early cold-water breakthrough. The potential recoverable heat and the current challenges to enhance further expansion of heat exploitation from this basin are evident. This paper presents an overview of the current understanding and uncertainties of the aquifer geology of the Upper Jurassic to Lower Cretaceous strata and discusses new sequence-stratigraphic updates of the regional sedimentary aquifer architecture.