西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

考虑蚓孔的碳酸盐岩酸化产能计算新模型

纪国法1 *,杨兆中1,李小刚1,刘文涛2,周瀚3   

  1. 1.“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
    2. 中国石油新疆油田公司勘探开发研究院,新疆克拉玛依834000
    3. 中国石油川庆钻探工程有限公司井下作业公司,四川成都610051
  • 出版日期:2016-06-01 发布日期:2016-06-01
  • 通讯作者: 纪国法,E-mail:jiguofa@163.com
  • 基金资助:

    国家自然科学基金(51074134;51204138)。

A Novel Well Productivity Model of Carbonate Reservoir Matrix#br# Acidizing Considering Wormhole

JI Guofa1*, YANG Zhaozhong1, LI Xiaogang1, LIU Wentao2, ZHOU Han3   

  1. 1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Exploration and Development Research Institute of Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China
    3. Chuanqing Drilling Engineering Company Limited Downhole Service Company,PetroChina,Chengdu,Sichuan 610051,China
  • Online:2016-06-01 Published:2016-06-01

摘要:

针对碳酸盐岩基质酸化产能常规计算方法未能考虑酸蚀蚓孔数量和酸蚀蚓孔渗流特性影响这一问题,开展了
考虑蚓孔的碳酸盐岩酸化产能的研究,研究中采用了径向蚓孔生长理论模型和蚓孔区等效渗透率模型,建立了考虑蚓
孔的碳酸盐岩酸化产能计算新模型。由室内碳酸盐岩岩芯15% 盐酸驱替实验结果,优选了最优的注酸速度及蚓孔突
破时酸液注入的孔隙体积倍数,计算了有效主蚓孔的长度和直径、蚓孔区等效渗透率和酸化产能,结果表明新模型计
算的产能与真实定压求产的产能相当,为碳酸盐岩酸化产能预测提供了一种新的理论方法。

关键词: 蚓孔, 径向, 等效渗透率, 基质酸化, 产能, 模型

Abstract:

We studied the wormhole effect on the well productivity which conventional well productivity model of matrix
acidizing in carbonate reservoir did not take into consideration. On the basis of the wormhole growth model in radial geometry
and the equivalent permeability model,this paper established a new well productivity model considering wormhole. Based on
the laboratory experiment data of carbonate core displacement by 15% HCl,we selected the optimal acid injection velocity and
the optimal pore volume to breakthrough,and calculated the effective dominant wormhole length and diameter and equivalent
permeability in post-stimulation area near wellbore. Then we calculated the well productivity,and compared it with the real
productivity,and the result shows that when considering the wormhole,the new model is accurate and reliable. This research
presents a new method to predict the well productivity for matrix acidizing in carbonate reservoir.

Key words: wormhole, radial geometry, equivalent permeability, matrix acidizing, well productivity, model

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