西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (2): 129-132.

• 石油与天然气工程 • 上一篇    下一篇

高含硫气井井筒硫沉积位置预测模型研究

付德奎1 郭肖2 杜志敏2 邓生辉3 刘林清4   

  1. 1. 中国石化中原油田普光分公司开发部,四川 达州 635000;2.“油气藏地质及开发工程国家重点实验室”? 西南石油大学,四川 成都 610500;3. 中国石油吐哈油田工程技术研究院,新疆 鄯善 838202;4. 中国石油西南油气田公司勘探开发研究院,四川 成都 610051
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-04-20 发布日期:2011-04-20

FORECAST MODEL OF LOCATION OF SULFUR DEPOSITION IN THE WELL BOREOF HIGH SULFUR GAS WELL

FU De-kui 1 GUO Xiao 2 DU Zhi-min 2 DENG Sheng-hui 3 LIU Lin-qing 4   

  1. (1. Puguang Company, Zhongyuan Oilfield, SINOPEC, Dazhou, Sichuan 635000, China; 2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China; 3. Drilling and Production Institute, Tuha Oilfield, Shanshan, Xinjiang 838202, China 4. Research Institute of Exploration and Development,Southwest Oil and Gas Field Company, CNPC, Chengdu, Sichuan 610051, China)Journal of Southwest PetroleumUniversity, Vol. 33, No. 2, 129 – 132, 2011(1674 – 5086,in Chinese)
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-04-20 Published:2011-04-20

摘要: 高含硫气井在气体开采过程中,随着井筒温度压力的降低,硫微粒在气相中的溶解度逐渐减小,在达到临界饱和态后将从气相中析出,当井筒中硫析出位置处的气流速度小于微粒临界悬浮流速时,析出的硫微粒在井筒中沉积,堵塞气体的流动通道,从而导致气井产量降低,影响气井的产能和经济效益,严重时造成气井停产。将井筒压力温度分布预测模型与硫溶解度模型耦合,结合井筒中微粒临界悬浮流速模型建立了高含硫气井井筒硫沉积预测综合模型,并对
L 井进行了实例分析。研究结果表明:高含硫气井产量降低至临界产量后,随着气井产量的降低,井筒中气流速度逐渐减小,硫沉积区域沿井筒向下逐渐增加。

关键词: 高含硫气井, 井筒, 硫沉积, 位置, 临界流速

Abstract: During the course of production of high sulfur gas well, temperature and pressure falls continually along well bore, solubility of sulfur particles in gas phase declines, and sulfur particle precipitate in well bore from gas phase
after running up to saturation state if velocity of gas is less than critical sustaining velocity of particle, sequentially resulting in blockage of gaseous flow channel. Gas well production may halts when sulfur deposition became severe. In this paper, an integrated forecast model of sulfur deposition in high sulfur gas well is presented by coupling pressure and temperature forecasting model, critical sustaining velocity model of particle and model of solubility of
sulfur particles in gas phase. A case analysis is carried out in well-L. The result shows that, with production decrease,gaseous velocity gradually declines, and therefore, area of sulfur deposition steps up along borehole after production
declines to critical production.

Key words: high sulfur gas well, well bore, sulfur deposition, location, critical velocity

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