高含硫气藏液硫沉积对储层伤害的实验研究
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TE349

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国家自然科学基金项目(51474181)


Experimental Study on Damage to Reservoir Caused by Liquid Sulfur Deposition in High Sulfur Gas Reservoirs
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    摘要:

    目前针对储层中液硫沉积方面的研究多局限在气-液硫两相渗流方面,未见低于最大束缚硫饱和度条件下的储层伤害方面的报道,为此提出了一种在岩心中建立低于最大束缚硫饱和度的实验评价方法,测试了不同物性岩心在不同液态硫饱和度下的伤害程度,分析储层液态硫饱和度的影响因素和液态硫在孔隙中的微观分布形态。实验结果表明,相同地层压力下,随实验温度(120-160℃)增加,液态硫在岩心中的沉积能力减弱;相同实验温度下,随地层压力的降低,岩心承受的有效压力增加,束缚硫饱和度增加。相同条件下,岩心物性越差,液硫沉积伤害程度越大。对实验后的岩心进行扫描电镜发现,岩心孔隙中均有液硫沉积堵塞,沉积在孔隙中的单质硫粒径主要分布在3μm至16μm之间。

    Abstract:

    Now for the liquid sulfur deposition in the reservoir of sulfur are limited in the gas-liquid two phase flow, under the condition of no lower than the maximum bound sulfur saturation of reservoir damage reports, are proposed in this core set up below the maximum bound sulfur saturation experiment evaluation method, test the different property of core damage under different liquid sulfur saturation degree, analysis the influence factors of reservoir liquid sulfur saturation and liquid sulfur in microscopic pore distribution form. The experimental results show that under the same formation pressure, the deposition capacity of liquid sulfur in the core decreases with the increase of experimental temperature (120-160℃). At the same test temperature, with the decrease of formation pressure, the effective pressure on the core increases and the bound sulfur saturation increases. Under the same condition, the worse the core physical property is, the greater the damage degree of liquid sulfur deposition is. Scanning electron microscopy (SEM) of the cores showed that the pores of the cores were all clogged with liquid sulfur deposition, and the particle size of elemental sulfur deposited in the pores was mainly distributed between 3 μm and 16 μm.

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王宁,张广东,孙大龙,等. 高含硫气藏液硫沉积对储层伤害的实验研究[J]. 科学技术与工程, 2021, 21(12): 4924-4928.
Wang ning, Zhang Guangdong, Sun dalong, et al. Experimental Study on Damage to Reservoir Caused by Liquid Sulfur Deposition in High Sulfur Gas Reservoirs[J]. Science Technology and Engineering,2021,21(12):4924-4928.

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历史
  • 收稿日期:2020-09-21
  • 最后修改日期:2021-04-23
  • 录用日期:2020-12-21
  • 在线发布日期: 2021-05-17
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