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首页> 外文会议>SPE international sympoisum on formationnn damage control >Iron Release Following Mineral Dissolution Following Scale Inhibitor Application In a North Alaskan Reservoir
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Iron Release Following Mineral Dissolution Following Scale Inhibitor Application In a North Alaskan Reservoir

机译：在北阿拉斯加储层中的规模抑制剂应用后矿物溶解后铁释放

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High levels of dissovled iron present in produced waters have caused concern in a number of wells in North Alaskan Reservoirs. In this paper, two dynamic "reservoir condition" scale inhibitor core flooding experiments have been conducted to simulate scale inhibitor treatments using a pre-selected commercial phosphonate based scale inhibitor. In these floods very high levels of iron were released during the chemical injection and shut-in stages (> 450ppm in solution). Evidence from pre and post treatment SEM analysis revealed that the major cause for the excessive iron release was extensive dissolution of siderite, inducing considerable mechanical weakness of the core, which was particularly evident for core 1, and much less so in core 2. However, although both cores have similar percentages of siderite, it is the textural arrangement, which is of prime importance in relation to formation damage. In core systems where siderite supports many grain contacts any fludi/mineral dissolution reactions will significantly impair mechanical strength (core !), potentially leading to sand production. Where siderite is enclosed within finer carbonate mud lenses, or is not grain supporting, the mechanical damage is much less severe (core 2). Reactiosn of siderite with the core are quite complex. In this paper we demonstrate the formation of an oxidised rim of hematite which surrounds remnant siderite, with voides present between it and the hematite rim.
机译：产生的水域中存在的高水平残废的铁已经引起了北阿拉斯加储层的许多井中的关注。在本文中，已经进行了两个动态的“储层条件”规模抑制剂核心泛洪实验，以模拟使用基于预选的商业膦酸盐的抑制剂的抑制剂处理。在这些洪水中，在化学喷射和关闭阶段（溶液中> 450ppm> 450ppm）期间释放出很高的铁。来自前后治疗的证据SEM分析显示，过量的铁释放的主要原因是普遍的溶解，诱导核心的相当大的机械弱点，这对于核心1特别明显，并且在核心2中尤为明显。然而，核心2尤为明显。然而，虽然两个核心都有相似的壮丽百分比，但它是纹理安排，这是与形成损伤有关的重要性。在核心系统中，溅物体支持许多谷物接触，任何Fludi /矿物溶解反应都会显着损害机械强度（核心！），可能导致砂生产。在含有较好的碳酸泥泥镜片内封闭散热器的情况下，或者不是谷物支撑，机械损伤的损伤要严重得多（核心2）。浮石与核心的反应非常复杂。在本文中，我们证明了掩盖覆盖物的氧化边缘，其围绕残余颗粒，其与其和赤铁矿边缘之间存在的空隙。

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