气田开发

高速非达西流动时元素硫沉积模型研究

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  • 1.西南油气田公司勘探开发研究院,四川 成都 610050;
    2.西南石油大学油气藏地质及开发工程国家重点实验室,四川 成都 610050;
    3.西南油气田公司科技信息处,四川 成都 610050
杨学锋(1978-),男,湖北洪湖人,博士后,主要从事油气田开发等方面的研究.

收稿日期: 2007-05-14

  修回日期: 2007-08-02

  网络出版日期: 2007-10-10

基金资助

国家自然科学基金项目(编号:50474039)资助.

THE MODEL STUDY ON THE ELEMENTAL SULFUR DEPOSITION CONSIDERING HIGH VELOCITY NON\|DARCY FLOW

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  • 1. Southwest Oil and Gas Field Company Exploration and Development Research Ins titute,Chengdu 610050, China;
    2. State Key Laboratory of Reservoir Geology and Exploitation, Southwest Petrole um University,Chengdu 610050,China.
    3. Southwest Oil and Gas Field Company Science and Technology Bureau,Chengdu 610050, China.
    .

Received date: 2007-05-14

  Revised date: 2007-08-02

  Online published: 2007-10-10

摘要

元素硫沉积是含硫气藏开发过程中广泛存在而又必须解决的难题之一。高含硫气藏一旦 投入开发,地层压力会逐步下降,使得元素硫溶解度下降而沉积下来,沉积的元素硫会堵塞 地层孔隙,降低渗流通道,影响气井产能。考虑了高含硫气体在近井地带作高速非达西流动 ,建立了硫的沉积模型,并利用该模型对实际气藏进行预测和对比研究,再通过实例计算发 现,硫非瞬时平衡沉积比瞬时平衡沉积对地层的伤害更严重,高速非达西流动沉积比达西流 动时对地层伤害更严重,认为在开发高含硫气藏时,必须合理选择开发速度,有效防止元素 硫沉积。

本文引用格式

杨学锋, 胡勇, 黄先平, 杜志敏, 郭平 . 高速非达西流动时元素硫沉积模型研究[J]. 天然气地球科学, 2007 , 18(5) : 764 -766,773 . DOI: 10.11764/j.issn.1672-1926.2007.05.764

Abstract

The deposition of elemental sulfur belongs to one of the difficult tas ks when developing the high sulfur content gas reservoirs which are existed exte nsively.The solubility of elemental sulfur will be reduced when the pressure de creases.The reduction of elemental sulfur solubility leads to sulfur deposition s, which damages the formation and depress the porosity and permeability.The re sults of sulfur deposition depress the gas production.Based on the high velocit y non-Darcy flow near the well bore, the model of elemental sulfur deposition i s  established firstly, then using it to calculate the real gas reservoirs compari ng to the Darcy flow.By comparison, the results show that the amount of the non -equilibrium deposition is more than the equilibrium deposition and the damage  c aused by the non-Darcy flow is severe r than the Darcy flow.So a reasonable production rate must be chosen in order to prevent the sulfur from deposition when  developing the gas reservoirs with high sulfur content.

参考文献

[1]李士伦. 天然气工程[M]. 北京:石油工业出版社. 2001.
[2]Frauk Civan, SPE.Modeling Well Performance Under None-quilibrium Deposit ion Conditions[R].SPE 67234, 2001.
[3]Bruce E Roberts. The Effect of Sulfur Deposition on Gas Well Inflow Per formance[R]. SPE 36707,1998.

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