Environmental Geosciences最新文献_第3页

Developing porosity–permeability transforms in two important oil-bearing formations in Ohio: The Clinton Sandstone and the Copper Ridge Dolomite 俄亥俄州两个重要含油层的孔隙度-渗透率变化：克林顿砂岩和铜脊白云石

Environmental Geosciences Pub Date : 2019-03-15 DOI: 10.1306/EG.01241817019

Jared Hawkins, Srikanta Mishra, B. O'Reilly

引用次数: 1

Mapping of groundwater potential zones using remote sensing and geographic information system: A case study of parts of Tigray, Ethiopia 利用遥感和地理信息系统绘制地下水潜在带:埃塞俄比亚提格雷部分地区的个案研究

Environmental Geosciences Pub Date : 2018-12-01 DOI: 10.1306/EG.06181818001

T. Gebre, I. Ahmad, Mithas Ahmad Dar, Ebissa Gadissa, Afera Halefom Teka, Asirat Teshome Tolosa, E. S. Brhane

引用次数: 5

Predicting gas migration through existing oil and gas wells 通过现有油气井预测天然气运移

Environmental Geosciences Pub Date : 2018-12-01 DOI: 10.1306/EG.01241817008

James A. Montague, G. Pinder, T. Watson

{"title":"Predicting gas migration through existing oil and gas wells","authors":"James A. Montague, G. Pinder, T. Watson","doi":"10.1306/EG.01241817008","DOIUrl":"https://doi.org/10.1306/EG.01241817008","url":null,"abstract":"The ability to accurately predict the probability of fluid migration from depth through existing wells based on known well properties, such as age and depth, would be enormously helpful in understanding how migration pathways develop and the identification of potential migration without extensive field tests. The presence of fluid pathways is an important environmental issue because such pathways allow gas, either naturally occurring methane or sequestered CO2, to move into the atmosphere. In this paper, we explore the ability of various predictive models to forecast gas migration at existing wells in Alberta, Canada, based upon the characteristics of existing deep wells. Alberta was selected as a case study because of the availability of data in an area that has required wells to be tested for pathway development after rig release since 1995. Wells that do not demonstrate pathway development require no further testing until the well is abandoned. We show that accurately predicting fluid migration requires detailed information on well construction, production, and fluid properties, and even then, the models considered in this study misclassify a large number of wells. This suggests other factors may contribute to pathway formation. Of the models investigated, random forests provide the best results on this data set, correctly identifying 78% of the wells used.","PeriodicalId":11706,"journal":{"name":"Environmental Geosciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1306/EG.01241817008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47300461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

A multi-isotope approach to determine the origin of methane and higher alkanes in groundwater of the St. Lawrence Platform, Saint-Édouard area, eastern Canada 用多同位素方法确定加拿大东部圣-Édouard地区圣劳伦斯台地地下水中甲烷和高级烷烃的来源

Environmental Geosciences Pub Date : 2018-09-01 DOI: 10.1306/EG.04121817020

Geneviève Bordeleau, C. Rivard, D. Lavoie, R. Lefebvre, J. Ahad, Xiaomei Xu, A. Mort

{"title":"A multi-isotope approach to determine the origin of methane and higher alkanes in groundwater of the St. Lawrence Platform, Saint-Édouard area, eastern Canada","authors":"Geneviève Bordeleau, C. Rivard, D. Lavoie, R. Lefebvre, J. Ahad, Xiaomei Xu, A. Mort","doi":"10.1306/EG.04121817020","DOIUrl":"https://doi.org/10.1306/EG.04121817020","url":null,"abstract":"In the last decade, production of shale gas has tremendously increased, and the need for local pre-exploitation baseline data on dissolved natural gas in aquifers has been stressed. This study investigated the origin of hydrocarbons naturally present in shallow aquifers of the Saint-Edouard area (Quebec, eastern Canada), where the underlying Utica Shale is known to contain important gas resources that have not yet been exploited. Groundwater and shallow bedrock gas samples were collected and analyzed for isotopic composition of alkanes (δ13C and δ2HC1–C3), dissolved inorganic carbon (δ13CDIC), and radiocarbon in methane and DIC (14CDIC, 14CCH4). This multi-isotope approach proved enlightening, and results revealed that (1) most of the methane in the region is of microbial origin; (2) partial contribution of thermogenic gas occurs in 15% of the wells; (3) processes such as late-stage methanogenesis and methane oxidation are responsible for ambiguous methane isotopic compositions; and (4) both microbial and thermogenic gas originate from the shallow bedrock aquifer, with the exception of one sample likely coming from deeper units. The thick succession of shales overlying the Utica Shale thus appears to act as an effective migration barrier for the shallow aquifers. However, evidence of upward migration of old brines near major fault zones indicates that these may serve as a preferential migration pathway over a certain depth but most likely no more than approximately 200–500 m (∼650–1640 ft). The geochemical framework presented here will hopefully be useful in other research projects, especially when conventional indicators of natural gas origin provide ambiguous results.","PeriodicalId":11706,"journal":{"name":"Environmental Geosciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1306/EG.04121817020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43374072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Preglacial paleotopography at the eastern terminus of the Plum River Fault Zone, Ogle County, Illinois 伊利诺伊州奥格尔县梅河断裂带东端的前冰期古地形

Environmental Geosciences Pub Date : 2018-09-01 DOI: 10.1306/EG.06181817016

M. Rhoads, D. Malone

{"title":"Preglacial paleotopography at the eastern terminus of the Plum River Fault Zone, Ogle County, Illinois","authors":"M. Rhoads, D. Malone","doi":"10.1306/EG.06181817016","DOIUrl":"https://doi.org/10.1306/EG.06181817016","url":null,"abstract":"The purpose of this study is to deconstruct the relationship between the Leaf River anticline and the preglacial bedrock paleotopography at the eastern terminus of the Plum River Fault Zone in Ogle County, Illinois, using a geostatistical approach. The contour maps derived from the elevation models provided detailed depictions of the ancient bedrock landscape and subsurface structure in the study area. The Leaf River anticline is interpreted to be a component of hanging-wall anticline at the terminus of the Plum River Fault Zone. The topographic high created by the anticline controlled local drainage and led to the development of the Leaf River paleovalley prior to the Pleistocene. The catastrophic failure of an ice damn during the Illinois glacial episode carved a glacial spillway into the north flank of the Leaf River anticline that interfaced with a tributary of the Leaf River paleovalley. This rerouted the preglacial drainage network and permanently diverted the ancient Rock River to its modern-day position. Ultimately, the subsurface geometry of the Leaf River anticline and its relationship to the local bedrock paleotopography were revealed by the elevation models. The position and development of the Leaf River paleovalley and glacial spillway interpreted in this study aligned with the regional interpretations for the evolution of the ancient bedrock landscape established in prior works. However, this study revealed that the Leaf River anticline and, by association, the terminus of the Plum River Fault Zone extend farther east into the region than indicated by prior works.","PeriodicalId":11706,"journal":{"name":"Environmental Geosciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41809127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hydrogeochemical controls on brackish groundwater and its suitability for use in hydraulic fracturing: The Dockum Aquifer, Midland Basin, Texas 微咸水地下水的水文地球化学控制及其在水力压裂中的适用性：德克萨斯州米德兰盆地Dockum含水层

Environmental Geosciences Pub Date : 2018-06-01 DOI: 10.1306/EG.01241817017

Francisco R. Reyes, M. Engle, Lixin Jin, M. A. Jacobs, J. Konter

{"title":"Hydrogeochemical controls on brackish groundwater and its suitability for use in hydraulic fracturing: The Dockum Aquifer, Midland Basin, Texas","authors":"Francisco R. Reyes, M. Engle, Lixin Jin, M. A. Jacobs, J. Konter","doi":"10.1306/EG.01241817017","DOIUrl":"https://doi.org/10.1306/EG.01241817017","url":null,"abstract":"To better understand controls on the origin and evolution of brackish groundwater, the hydrogeochemistry of brackish groundwaters was studied within the Triassic Dockum Group across the Midland Basin in Texas. The suitability of Dockum Aquifer water for use in hydraulic fracturing fluid was examined because the area overlies the largest and most productive tight oil province in the United States. Groundwater generally flows southward and eastward across the basin. Transmissivities indicate that water yield from the Dockum Aquifer is mixed. Higher salinity (up to ∼100 g/L), group I water is found mainly in the center and western parts of the basin; chemistry of these meteoric waters is controlled by water–rock interaction with salinity increasing along its flow path via dissolution of halite and anhydrite, followed by salinity-enhanced carbonate dissolution and/or cation release from clays. Along the down-gradient basin margins, lower salinity (<7.5 g/L), group II waters of various ion compositions are more commonly found. Group II waters are also meteoric but from local recharge including downward flow from the Edwards–Trinity or other aquifers. Despite having lower salinity, the water in the down-gradient southern and eastern margins of the basin can exceed acceptable SO4 limits for cross-linked gel fluids. Generally, the majority of the water in the basin is suitable for use with slick-water hydraulic fracturing. Findings from this research provide important information on the complex controls on the chemistry of brackish groundwater and their potential beneficial uses in the oil and gas industry.","PeriodicalId":11706,"journal":{"name":"Environmental Geosciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1306/EG.01241817017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48905903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Quantitative assessment of the runoff index in an urbanized watershed 城市化流域径流指数的定量评价

Environmental Geosciences Pub Date : 2018-06-01 DOI: 10.1306/EG.01241817015

I. Chenini, L. Kouzana, M. Msaddek

引用次数: 1

Groundwater resources evaluation using geospatial technology 利用地理空间技术评价地下水资源

Environmental Geosciences Pub Date : 2018-03-01 DOI: 10.1306/EG.01241817010

Tesfa Gebrie, Ebissa Gadissa, I. Ahmad, Mithas Ahmad Dar, Afera Halefom Teka, Asirat Teshome Tolosa, E. S. Brhane, A. Fenta

{"title":"Groundwater resources evaluation using geospatial technology","authors":"Tesfa Gebrie, Ebissa Gadissa, I. Ahmad, Mithas Ahmad Dar, Afera Halefom Teka, Asirat Teshome Tolosa, E. S. Brhane, A. Fenta","doi":"10.1306/EG.01241817010","DOIUrl":"https://doi.org/10.1306/EG.01241817010","url":null,"abstract":"Groundwater is water located beneath the ground surface in soil pore spaces and in the fractures of lithologic formations. The advent of remote sensing and geographic information systems (GIS) has opened up new vistas in groundwater prospect evaluation, exploration, and management. This paper mainly deals with the integrated approach of remote sensing and GIS to delineate groundwater potential zones in of parts of Palar basin. Digitized vector maps pertaining to chosen parameters, namely, geomorphology, geology, land use/land cover, lineament, relief, and drainage, were converted to raster data using 23 m2 (76 ft2) grid cell size. The raster maps of these parameters were assigned to their respective theme weight and class weights. The individual theme weight was multiplied by its respective class weight, and then all the raster thematic layers were aggregated in a linear combination equation in ArcMap GIS Raster Calculator module. Moreover, the weighted layers were statistically modeled to get the areal extent of groundwater prospects with respect to each thematic layer. The final result depicts the favorable prospective zones in the study area and can be helpful to better plan exploration and management.","PeriodicalId":11706,"journal":{"name":"Environmental Geosciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1306/EG.01241817010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48506942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Facies associations and chemostratigraphy of the Lower Cretaceous Kurnub Group and their boundaries, King Talal Dam section, northwestern Jordan 约旦西北部King Talal坝段下白垩统Kurnub群及其边界相组合、化学地层学研究

Environmental Geosciences Pub Date : 2018-03-01 DOI: 10.1306/EG.01241817012

S. Farouk, H. Al-Zubi, T. Abdelkader, F. Ahmad

引用次数: 3

Strontium isotopes as a potential fingerprint of total dissolved solids associated with hydraulic-fracturing activities in the Barnett Shale, Texas 锶同位素作为德克萨斯州Barnett页岩水力压裂活动相关的总溶解固体的潜在指纹

Environmental Geosciences Pub Date : 2017-12-01 DOI: 10.1306/EG.06191716501

R. B. Goldberg, E. Griffith

引用次数: 2