共查询到20条相似文献,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
7.
Dietrich Gurlitt 《International Journal of Earth Sciences》1939,30(7-8):765-776
8.
9.
10.
Background
Reactive-transport simulation is a tool that is being used to estimate long-term trapping of CO2, and wellbore and cap rock integrity for geologic CO2 storage. We reacted end member components of a heterolithic sandstone and shale unit that forms the upper section of the In Salah Gas Project carbon storage reservoir in Krechba, Algeria with supercritical CO2, brine, and with/without cement at reservoir conditions to develop experimentally constrained geochemical models for use in reactive transport simulations.Results
We observe marked changes in solution composition when CO2 reacted with cement, sandstone, and shale components at reservoir conditions. The geochemical model for the reaction of sandstone and shale with CO2 and brine is a simple one in which albite, chlorite, illite and carbonate minerals partially dissolve and boehmite, smectite, and amorphous silica precipitate. The geochemical model for the wellbore environment is also fairly simple, in which alkaline cements and rock react with CO2-rich brines to form an Fe containing calcite, amorphous silica, smectite and boehmite or amorphous Al(OH)3.Conclusions
Our research shows that relatively simple geochemical models can describe the dominant reactions that are likely to occur when CO2 is stored in deep saline aquifers sealed with overlying shale cap rocks, as well as the dominant reactions for cement carbonation at the wellbore interface. 相似文献11.
12.
湖南水口山铅锌金银矿床地球化学特征 总被引:4,自引:0,他引:4
根据湘南区域地球化学特征,结合水口山矿田之成矿地质矿床特点.分别研究了不同层位、不同岩性的微量元素地球化学特征以及不同构造条件下的地球化学形为,对两大不同成岩、成矿系列中不同微量元素组合可引起的原、次生晕异常可形成的特征作了较为深入研究、讨论,并总结出化探异常元素组合特点与找矿意义. 相似文献
13.
Guo XuequanSoutheast Hubei Geological Party Hubei Bureau of Geology Mineral Resources Daye Hubei 《《地质学报》英文版》1994,68(3)
This paper discusses geological-geophysical-geochemical models of such typical deposits as the Tieshan-type Fe-Cu deposit, the Tonglushan-type Cu-Fe deposit, the Yehuaxiang-type Cu deposit, the Jiguanzui-type Cu-Au deposit, and the Tongshankou-type Cu (Mo) deposit. The models were established based on practical data of the polymetallic deposits dominated by copper ore in southeastern Hubei. These models, which are graphically illustrated in the paper, systematically summarize the metallogenic geological conditions and the geophysical-geochemical characteristics of copper deposits in this area. The models are of practical significance for studying copper deposits, predicting mineral resources, choosing exploration methods, and searching for ore deposits based on existing ones in the study area. 相似文献
14.
多极距中梯测深法是一种效率高、信息丰富的新型体积测深技术,而当前常规多极距中梯测深应用与研究多数局限于二维空间,其三维正反演一直是人们研究的热点。本文在四面体交错网格剖分基础上,采用有限单元法对球体等三维模型进行多极距中梯测深数值模拟计算。研究表明,三维数值模拟可有效反映模型的空间分布;在不增加太多工作量的情况下,实现高效体积测深;电阻率和极化率参数模拟相结合分析,模拟精度高,稳定性好;开展倾斜铜板、铜块水槽物理模拟,模拟结果较好反映了模型的空间及电性分布,验证了多极距中梯测深的可行性和正确性,为该方法的实际应用及后续的反演工作提供了重要依据。 相似文献
15.
大降坪黄铁矿区铅锌银多金属矿体赋存于震旦系大绀山组b段(Zdb)。本文综合研究了该矿体的地质特征,并指出黄铁矿底板的黑色岩系是矿区铅、锌、银、锡等金属的矿源层和矿体赋矿层位,旨在外围及深部找矿,以实现扩大矿产资源量。 相似文献
16.
Guo Xuequan 《《地质学报》英文版》1994,7(3):299-309
Abstract This paper discusses geological - geophysical - geochemical models of such typical deposits as the Tieshan - type Fe-Cu deposit, the Tonglushan - type Cu - Fe deposit, the Yehuaxiang - type Cu deposit, the Jiguanzui-type Cu - Au deposit, and the Tongshankou - type Cu(Mo) deposit. The models were established based on practical data of the polymetallic deposits dominated by copper ore in southeastern Hubei. These models, which are graphically illustrated in the paper, systematically summarize the metallogenic geological conditions and the geophysical-geochemical characteristics of copper deposits in this area. The models are of practical significance for studying copper deposits, predicting mineral resources, choosing exploration methods, and searching for ore deposits based on existing ones in the study area. 相似文献
17.
18.
《Gondwana Research》2000,3(1):3-5
The tectonic history of Sri Lanka - India can be traced from the Precambrian to the present. On the basis of the geological record, plate tectonic processes have operated for example, the Highland Group of Sri Lanka may have represented a Precambrian plate tectonic suture. Tectonic models of these Precambrian events may be presented by spreading, collision, subduction, shearing or in situ jostling. The recent tectonic history of Sri Lanka and India relates to the evolution of the Indian Ocean since at least the Cretaceous. Although Sri Lanka is considered to be a part of the larger Indo - Australian plate, it may have had a local independent history as a block within the larger crustal unit of India. There is evidence that the separation of Sri Lanka from India was in part controlled by Precambrian structures and a history of translational, rotational and vertical adjustments to the Indian Ocean developmental plate tectonic stresses still operating. 相似文献
19.
20.
水泥土围护结构的工程实例分析 总被引:1,自引:0,他引:1
某基坑工程采用水泥土围护结构的设计原理,以及由于上部结构设计变更后采用水泥土搅拌桩和型钢组合式围护结构的设计计算方法。计算结果与实测比较吻合。 相似文献