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首页> 外文期刊>Applied Geochemistry: Journal of the International Association of Geochemistry and Cosmochemistry >Groundwater quality of a public supply aquifer in proximity to oil development, Fruitvale oil field, Bakersfield, California
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Groundwater quality of a public supply aquifer in proximity to oil development, Fruitvale oil field, Bakersfield, California

机译：石油开发区附近的公共供应含水层的地下水质量，水果油田，贝克斯菲尔德，加利福尼亚州

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Due to concerns over the effects of oil production activities on groundwater quality in California, chemical, isotopic, dissolved gas and age-dating tracers were analyzed in samples collected from public-supply wells and produced-water sites in the Fruitvale oil field (FVOF). A combination of newly collected and historical data was used to determine whether oil formation fluids have mixed with groundwater used for public supply and what the potential pathways for the migration of oil formation fluids into groundwater may be. Stable isotopes of water (delta H-2 and delta O-18) and age dating (H-3, He-3(tr)it, SF6 and C-14) tracers in groundwater samples were consistent with the Kern River being the main source of recharge to aquifers. The distribution of major ion concentrations and pH with distance from the Kern River indicate that natural processes were the primary controls on groundwater salinity. Two of 14 groundwater samples had delta(13) C-DIC values (- 2.4 to + 1.9 per mil) consistent with mixtures of < 1 to about 9 percent oil-field water. Concentrations of TDS in groundwater samples were generally much lower (129-1,200 milligrams per liter (mg/l), median 216 mg/l) than produced water samples (586-24,930 mg/l, median 2,717 mg/l), suggesting that any mixing of oil-field water with groundwater has not significantly affected groundwater salinity. Trace concentrations of thermogenic methane were detected in three groundwater samples that did not have dissolved inorganic or isotopic indicators consistent with mixing of oilfield water, suggesting that stray gases may have migrated from the subsurface via preferential pathways such as leaky well bores into groundwater aquifers. Low concentrations of petroleum hydrocarbons were detected in samples that also contained anthropogenic VOCs and components of post- and pre-1950s recharge, indicating that petroleum hydrocarbons could have come from subsurface and/or surface sources. Overall, the results of this study indica
机译：由于担心石油生产活动对加利福尼亚地区地下水质量的影响，分析了在水果井油田（FVOF）中的公共供应井和生产水位的样品中分析了化学，同位素，溶解气体和年龄约会示踪剂。新收集和历史数据的组合用于确定油形成液是否与用于公共供应的地下水混合，以及将油形成流体迁移到地下水中的潜在途径。地下水样品中的水（Delta H-2和Delta O-18）和年龄约会（H-3，He-3（TR），SF6和C-14）示踪剂的稳定同位素与主要的克伦河是主要的给含水层的充值来源。主要离子浓度和距离Kern河距离的pH分布表明，天然过程是地下水盐度的主要管制。 14个地下水样品中的两个具有δ（13）C-DIC值（ - 2.4至+ 1.9 /米隆），其与<1至约9％的油田水的混合物一致。地下水样品中TDS的浓度通常远低于生产的水样（586-24,930 mg / L，中位数2,717 mg / L），浓度低得多（每升/升（mg / l），216 mg / l），这表明任何与地下水的油田水混合都没有显着影响地下水盐度。在三个地下水样品中检测到痕量的热甲烷，其在三种地下水中检测到没有溶解的无机或同位素指示剂与油田水的混合一致，表明杂散气体可能已经通过优先途径从地下迁移，例如泄漏井孔进入地下水含水层。在样品中检测到低浓度的石油烃，所述样品中也含有后期和20世纪50年代前补给的人为VOC和组分，表明石油烃可能来自地下和/或表面源。总体而言，这项研究的结果籼稻

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