高含硫气藏流体相态实验和硫沉积数值模拟

被引:14
作者
杜志敏
机构
[1] “油气藏地质及开发工程”国家重点实验室·西南石油大学
关键词
硫化氢; 气藏; 渗流; 规律; 数值模拟;
D O I
暂无
中图分类号
TE319 [模拟理论与计算机技术在开发中的应用];
学科分类号
082002 ;
摘要
高含硫酸性气藏在四川盆地有着广泛的分布,酸性气藏的开发对"川气东送"工程有着重要意义。由于H2S的剧毒性和强腐蚀性,该类气藏的钻完井工程、开采工艺、修井作业、地面输送以及室内实验研究均存在较大难度和危险性。同时由于酸性气藏在开采过程中,存在复杂的相态变化和硫沉积现象,导致渗流规律极其复杂。为此,采用物理实验测试了酸性气藏混合气体偏差因子,并引入空气动力学理论,建立了考虑微粒和气流速度差异的高含硫酸性气藏气固耦合综合数学模型,模拟研究了气流速度、气体初始H2S含量和地层渗透率对硫沉积和气井生产动态的影响。研究结果表明:①酸性气体偏差因子首先随着压力的升高而降低,当压力超过20MPa后随着压力的增加而增加,压力超过55MPa时呈明显的线性关系;②气流速度越大,硫沉积速率越快;③H2S浓度越高,硫沉积越严重;④气藏渗透率越低,硫沉积现象越明显。
引用
收藏
页码:78 / 81+144 +144-145
页数:6
相关论文
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