Reservoir-scale CO2 -fluid rock interactions: Preliminary results from field investigations in the Paradox Basin, Southeast Utah
Reservoir-scale CO2 -fluid rock interactions: Preliminary results from field investigations in the Paradox Basin, Southeast Utah
复制标题
储层规模 CO2 与流体岩石相互作用：犹他州东南部 Paradox 盆地现场调查的初步结果
DOI：
10.1016/j.egypro.2011.02.479
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Pearce J
中科院分区：
文献类型：
--
作者：
Pearce J
尽管详细研究的历史很长，但美国犹他州东南部科罗拉多高原的大量侏罗纪砂岩露头仍然为研究侏罗纪规模的过程提供了机会。在这些储层中有许多大规模的CO2积累，局部也有天然和人为的富CO2泉和间歇泉，通常产生或与碳酸盐矿床有关。因此，这些岩石已经暴露于CO2和/或CO2丰富的沃茨在相当长的一段时间，并因此可能提供有关所产生的地球化学和地质力学过程的信息。Salt Wash地堑是一个WNW-ESE走向的构造，在犹他州的绿色河以南横穿一个向北倾伏的背斜。盐洗地堑位于研究充分的“水晶间歇泉”的南部，本身含有几个富含二氧化碳的泉水和丰富的碳酸盐矿床。光滑岩石的岩石和侏罗纪恩特拉达砂岩的地球成员在地堑北部的背斜核心露出。这些区域局部被广泛漂白，漂白最明显的是朝向地层最低暴露地层的底部，在航空照片中形成浅色区域。对这种漂白的性质及其与断层和断裂、冰脊和CO2泉的关系的实地调查得到了对航空照片和其他卫星遥感数据的详细分析的支持。遥感数据提供了一个地质背景，突出了不同的结构和地层控制之间观察到的区域广泛的漂白和漂白的盐洗地堑。成岩分析已经确定了漂白（铁染色的损失）和其他流体-岩石相互作用的地球化学过程，特别是漂白砂岩中孔隙度的增加和碳酸盐胶结作用的差异。简单的实验室实验也试图通过使未漂白的恩特拉达砂岩样品与富含二氧化碳的地层沃茨水反应来复制这些过程。在本文中，我们提出了一个初步的假设，试图连接的功能描述的盐洗地堑，这表明，富含CO2的流体可能产生了观察到的功能。如果这一假设被证明是正确的，盐洗地堑提供了相当大的潜力，详细研究油藏规模的流动约束的地球化学过程。
Despite a long history of detailed study, the extensive Jurassic sandstone outcrops of the Colorado Plateau in Southeast Utah, USA continue to provide opportunities to examine reservoir-scale processes. There are a number of large-scale CO2accumulations in these reservoirs and locally also natural and man-induced CO2-rich springs and geysers, often producing or associated with travertine deposits. These rocks have therefore been exposed to CO2and/or CO2-rich waters over a substantial period of time, and as such may provide information on resulting geochemical and geomechanical processes. Salt Wash Graben is a WNW-ESE trending structure that cuts across a northerly plunging anticline to the south of Green River, Utah. The Salt Wash Graben lies to the south of the well-studied ’Crystal Geyser’, and itself contains several CO2-rich springs and abundant travertine deposits. Rocks of the Slick Rock and Earthy members of the Jurassic Entrada Sandstone outcrop in the core of the anticline immediately to the north of the graben. These are locally extensively bleached, the bleaching being most pronounced towards the base of the stratigraphically lowest exposed strata, forming a light coloured area in aerial photos. Field investigations of the nature of this bleaching and its relationship to faults and fractures, travertines and CO2springs, have been supported by detailed analysis of aerial photographs and other satellite-based remote sensing data. The remote sensing data provides a geological context that serves to highlight the different structural and stratigraphic controls which were observed between the regionally extensive bleaching and the bleaching in the Salt Wash Graben. Diagenetic analyses have identified the geochemical processes responsible for bleaching (loss of iron-staining) and other fluid-rock interactions, notably increased porosity in bleached sandstones and differences in carbonate cementation. Simple laboratory experiments have also attempted to replicate these processes by reacting samples of unbleached Entrada Sandstone with CO2-rich formation waters. In this paper, we present a preliminary hypothesis that attempts to link the features described in the Salt Wash Graben, which suggest that CO2-rich fluids may have produced the observed features. If this hypothesis is proved correct, the Salt Wash Graben offers considerable potential to study in detail the flow-constrained geochemical processes at reservoir scale.
影响因子：
5
作者：
Gilfillan, Stuart Mn.;Ballentine, Chris J.;Cassidy, Martin
通讯作者：
Cassidy, Martin
探测深处：测试地下二氧化碳起源和迁移的天然示踪剂，犹他州
DOI：
10.1306/13171266st591353
发表时间：
2009
期刊：
Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole
影响因子：
--
作者：
M. Wilkinson;S. Gilfillan;R. Haszeldine;C. Ballentine
通讯作者：
C. Ballentine