天然气地球科学 ›› 2020, Vol. 31 ›› Issue (3): 335–339.doi: 10.11764/j.issn.1672-1926.2019.11.007

• 天然气开发 • 上一篇    下一篇

油气井产量递减分析新方法

王怒涛1(),杜凌云1,贺海波2,林火养2,祝明谦1   

  1. 1.西南石油大学石油与天然气工程学院, 四川 成都 610500
    2.中国石油大港油田公司勘探开发研究院,天津 300280
  • 收稿日期:2019-07-10 修回日期:2019-11-19 出版日期:2020-03-10 发布日期:2020-03-26
  • 作者简介:王怒涛(1968-),男,四川岳池人,副教授,博士,主要从事油气藏工程及油气井试井技术研究.E-mail:wnt3993@163.com.
  • 基金资助:
    “十三五”国家科技重大专项“致密砂岩气藏渗流特征及开发技术政策研究”(2016ZX05048-004-005┫资助.)

New method for analysis of oil and gas well production decline

Nu-tao WANG1(),Ling-yun DU1,Hai-bo HE2,Huo-yang LIN2,Ming-qian ZHU1   

  1. 1.Oil and Gas Engineering Institute of Southwest Petroleum University, Chengdu 610500, China
    2.Research Institute of Petroleum Exploration & Development, Dagang Oilfield Company, CNPC, Tianjin 300280, China
  • Received:2019-07-10 Revised:2019-11-19 Online:2020-03-10 Published:2020-03-26
  • Supported by:
    The China National Science & Technology Major Project during the 13th Five Year Plan(2016ZX05048-004-005)

摘要:

针对油气田产量递减规律,广大研究者提出多种产量递减模型,如:Arps模型、SEPD模型、Duong模型以及它们之间的组合模型等。在实际生产中,由于递减模型种类繁复,使用条件不同等原因,在应用递减分析时难以选择最优递减模型。通常做法是利用线性拟合或非线性拟合方法拟合实际生产数据,通过相关系数高低来确定选择的模型,这种选择办法需对每种模型都进行拟合,计算工作量较大。鉴于此,提出一种新的产量递减模型,通过理论验证,确定新模型既包含Arps递减规律,也涵盖SEPD模型和Duong模型。实际生产数据分析表明,该方法拟合精度高,适用范围广,可有效避免模型选择问题,为递减分析方法选择提供了依据。

关键词: 产量递减, Arps模型, SEPD模型, Duong模型, 组合模型

Abstract:

According to the study of production decline law of oil and gas fields, many researchers have proposed a variety of production decline models, such as Arps model, SEPD model, Duong model and combination model. In practical production, due to the variety of declining models and different use conditions, it is difficult to choose the optimal decline model because of the complexity of decline models and different conditions. The usual practice is to fit the actual production data by linear fitting or nonlinear fitting method, and determine the selected model by the correlation coefficient. When use those methods, you will waste time on fitting each model. Based on this, a new production decline model is proposed in this paper. Through theoretical verification, it is determined that the model includes not only Arps decline law, but also SEPD model and Duong model. Through the analysis of actual production data, the method has high fitting accuracy and wide application range, which can effectively avoid the problem of model selection and provide a basis for the selection of decline analysis method.

Key words: Production decline, Arps model, SEPD model, Duong model, Combination model

中图分类号: 

  • TE151

图1

各种递减模型示意"

图2

新的递减模型组合图"

图3

Arps递减模型与新模型对比"

图4

SEPD递减模型与新模型对比"

图5

Duong递减模型与新模型对比"

表1

基础参数"

参数数值参数数值
气藏初始压力/MPa16.7压裂裂缝条数9
气藏厚度/m12基质渗透率/(10-3 μm2)0.05
基质孔隙度/%8水平井水平段长度/m1 086

图6

各种递减模型拟合曲线对比"

表2

各种递减模型计算对比"

模型Arps模型SEPD模型Duong模型新模型
拟合相关系数0.7220.6160.8170.844
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