天然气地球科学

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多层合采气井产量劈分新方法

顾岱鸿1,崔国峰2,刘广峰1,丁道权1   

  1. 1.中国石油大学(北京)石油工程学院,北京 102249;
    2.中国石油集团测井有限公司随钻测井中心,陕西 西安710065
  • 收稿日期:2015-09-23 修回日期:2015-11-12 出版日期:2016-07-10 发布日期:2016-07-10
  • 作者简介:顾岱鸿(1970-),男,河南开封人,副教授,博士,主要从事油气田开发研究与教学工作. E-mail:gudaihong@cup.edu.cn.
  • 基金资助:
    国家科技重大专项“特低渗油藏有效开发技术”(编号:2011ZX05013-006)资助.

A new method of production splitting for multilayer commingled gas well

Gu Dai-hong1,Cui Guo-feng2,Liu Guang-feng1,Ding Dao-quan1   

  1. 1.College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;
    2.LWD Logging Center,China Petroleum Logging Co.Ltd.,Xi’an 710065,China
  • Received:2015-09-23 Revised:2015-11-12 Online:2016-07-10 Published:2016-07-10

摘要: 在分析突变理论原理的基础上,综合考虑影响各产层产量贡献的储量特征、开发特征和地质特征3类因素,首次应用突变理论建立了多层合采井产量劈分的新方法;把储量特征子系统的有效厚度、孔隙度、含气饱和度以及开发特征子系统中的渗透率、层间干扰系数、气层中深压力分别构建成2个燕尾突变模型;地质特征子系统中的沉积微相、砂岩含量、储层密度和气层中深4个因素构建成蝴蝶突变模型。在求得各子系统产层目标值与相对突变面目标值的基础上,计算了各产层产量劈分系数。通过实例详细介绍了新方法的计算过程,并应用于鄂尔多斯盆地榆林气田南区12口合采气井的产量劈分计算。结果表明新方法考虑因素全面,具有可靠性强、计算速度快的特点,新方法计算的劈分结果精度大幅度提高。

关键词: 多层合采气井, 突变理论, 产量劈分

Abstract: On the basis of studying catastrophe theory,in full consideration of each production layer’s reserve characteristics,development characteristics,and geological characteristics,a new production splitting method for multilayer commingled gas well was built with the application of the catastrophe theory for first time.A swallow tail catastrophe model consisted of three subsystems of reserve characteristics which included net pay thickness,porosity and gas saturation,and three subsystems of development characteristics which included permeability,interference factor,middle pressure,a butterfly catastrophe model consisted of four subsystems of geological characteristics,which included sedimentary microfacies,sandstone content,reservoir density and depth were established.Based on the target value of each subsystem and relative break surface,each layers’ production splitting factor was calculated.The calculating process of the new method was introduced through the example in detail,then production splitting calculation of twelve multilayer producers in the southern district of Yulin Gasfield was conducted with the new method.The results showed that the new method was comprehensively considered,with high reliability and fast calculation speed features,and the precision of this new method is greatly improved.

Key words: Multilayer commingled gas well, Catastrophe theory, Production splitting

中图分类号: 

  • TE375

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