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化工学报  2013 

碳酸盐岩油藏近井筒区域温度场的模拟

DOI: 10.3969/j.issn.0438-1157.2013.10.008, PP. 3542-3548

Keywords: 碳酸盐岩,蚓孔,温度场,突破体积

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Abstract:

在碳酸盐岩油藏酸化中,近井筒附近的温度场对酸化效果影响很大。通过一种双重尺度模型对这一问题进行了研究,模型考虑了孔隙中的对流传质、传热和液固表面的酸岩反应。结果表明:与实验室常温条件相比,地层高温条件下的酸岩反应速率增快,形成主蚓孔的注酸速度增大(Damk?hler数减小),且当注酸速度较大时,突破体积明显下降;当模拟区与外界不发生热交换时(绝热边界),由反应放出的热量使得模拟区的温度上升,造成突破体积比等温边界时的小;若酸液在井筒中不与地层发生热交换,则注酸速度较低时不同地层温度的突破体积几乎没有差别;反之,注酸速度较低时突破体积随着地层温度的上升而增加。

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