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首页> 外文期刊>Geochemistry, geophysics, geosystems >Noble Gases in Deepwater Oils of the U.S. Gulf of Mexico
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Noble Gases in Deepwater Oils of the U.S. Gulf of Mexico

机译：墨西哥美国海湾深水油中的高贵气体

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Hydrocarbon migration and emplacement processes remain underconstrained despite the vast potential economic value associated with oil and gas. Noble gases provide information about hydrocarbon generation, fluid migration pathways, reservoir conditions, and the relative volumes of oil versus water in the subsurface. Produced gas He-Ne-Ar-Kr-Xe data from two distinct oil fields in the Gulf of Mexico (Genesis and Hoover-Diana) are used to calibrate a model that takes into account both water-oil solubility exchange and subsequent gas cap formation. Reconstructed noble gas signatures in oils reflect simple (two-phase) oil-water exchange imparted during migration from the source rock to the trap, which are subsequently modified by gas cap formation at current reservoir conditions. Calculated, oil to water volume ratios (V_o/V_w) in Tertiary-sourced oils from the Hoover-Diana system are 2-3 times greater on average than those in the Jurassic sourced oils from the Genesis reservoirs. Higher V_o/V_w in Hoover-Diana versus Genesis can be interpreted in two ways: either (1) the Hoover reservoir interval has 2-3 times more oil than any of the individual Genesis reservoirs, which is consistent with independent estimates of oil in place for the respective reservoirs, or (2) Genesis oils have experienced longer migration pathways than Hoover-Diana oils and thus have interacted with more water. The ability to determine a robust V_o/V_w, despite gas cap formation and possible gas cap loss, is extremely powerful. For example, when volumetric hydrocarbon ratios are combined with independent estimates of hydrocarbon migration distance and/or formation fluid volumes, this technique has the potential to differentiate between large and small oil accumulations.
机译：尽管与石油和天然气相关的潜在经济价值，碳氢化合物迁移和施加过程仍然持续。惰性气体提供有关烃生成，流体迁移途径，储层条件和地下油与水的相对体积的信息。来自墨西哥湾（Genesis和Hoover-Diana）的两个不同油田的产生气体HE-NE-AR-KR-XE数据用于校准考虑水油溶性交换和随后的气帽形成的模型。在油中重建的惰性气体签名反射在从源岩迁移到捕集器期间施加的简单（两相）油水交换，随后通过在电流储液条件下通过气帽形成改性。计算出的，来自胡佛 - 戴安娜系统的叔烃油状物中的油体积比（V_O / V_W）平均比来自创世纪储层的侏罗酸盐油脂的水平更大2-3倍。 Hoover-Diana的V_O / V_W与Genesis中的较高V_O / V_W可以用两种方式解释：（1）Hover储层间隔比任何单独的创世纪储层都有2-3倍，这与石油的独立估计一致。对于各自的储存器，或（2）起草型油的迁移途径比胡佛戴安达油，因此与更多的水相互作用。尽管气盖形成和可能的气体盖损失，但仍然可以确定鲁棒V_O / V_W的能力极其强大。例如，当体积烃比与烃迁移距离和/或形成流体容积的独立估计结合时，该技术具有差异在大型和小的油累积之间的潜力。

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