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首页> 外文会议>International Symposium of the Society of Core Analysts >AN EXPERIMENTAL INVESTIGATION OF LOW SALINITY WATERFLOODING IN BEREA SANDSTONE This paper was prepared for presentation at the International Symposium of the Society of Core Analysts held in Austin,Texas,USA 18-21 September,2011 ABSTRACT
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AN EXPERIMENTAL INVESTIGATION OF LOW SALINITY WATERFLOODING IN BEREA SANDSTONE This paper was prepared for presentation at the International Symposium of the Society of Core Analysts held in Austin,Texas,USA 18-21 September,2011 ABSTRACT

机译：Berea Sandstone的低盐度水上水上的实验调查本文是在2011年9月18日至21日举行的奥斯汀举行的核心分析师协会国际研讨会上的介绍。

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Oil recovery by low-salinity waterflooding in secondary and tertiary modes was investigated in the present study.Cores from Berea outcrop sandstone and two types of Minnelusa crude oils were used in the core flooding experiments.Sets of experiments were performed using low-salinity brine flood as a tertiary recovery method where cores were first flooded with high-salinity brine,then flooded with low-salinity brine.In the second set of experiments,low-salinity brine was used in secondary recovery mode where oil saturated cores are directly flooded with low-salinity brine.Oil recovery and the pressure drop across the cores were measured continuously.Conductivity and pH were measured on aliquots of effluent brines. Increase in oil recovery with low salinity brine as the invading brine was observed in both secondary and tertiary modes(2-14% OOIP) with Berea sandstone.However,higher total oil recoveries(5-14% OOIP) were observed when low salinity waterflooding was implemented as a secondary recovery method.An increase in pH of the effluent brine was observed during the low salinity brine injection in all the experiments. The level of investigation into the mechanism of low-salinity incremental production has sharply increased in the past two years.Most of the studies focus on core floods using the tertiary mode.Our work contributes systematic coupled secondary and tertiary mode experiments that offer an expanded dataset for all researchers to use in investigation of the mechanisms.
机译：在本研究中研究了次级和三次模式下的低盐度的油回收。来自Berea露出砂岩的核，在核心泛滥实验中使用了两种类型的Minnelusa原油。使用低盐度盐水泛滥进行实验组。作为核心回收方法，其中核心用高盐度盐水淹没，然后用低盐度盐水淹没。第二组实验中，低盐度盐水用于二次恢复模式，油饱和芯直接用低淹没 - 盐度盐水。连续测量核心的回收率和压力下降。对流出物盐水的等分试样测量导电性和pH。随着仲裁液（2-14％OoIP）观察到侵入盐水的低盐度盐水的油回收率增加，随着Berea砂岩。然而，当低盐度水料时，观察到更高的总油回收率（5-14％OoIP）被实施为二次恢复方法。在所有实验中，在低盐度盐水注入期间观察到污水盐水的pH增加。在过去两年中，低盐度增量产量的调查水平大幅增加。大多数研究侧重于使用三级模式的核心洪水。我们的工作有助于提供扩展数据集的系统耦合二次和三级模式实验对于所有研究人员来说，用于调查机制。

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