西南石油大学学报(自然科学版)

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随钻地层压力测试增压效应响应机理研究

杨再生1,2,陈平1,杨川1,马天寿1   

  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. 中国石油长庆油田分公司,陕西西安710000
  • 出版日期:2013-06-01 发布日期:2013-06-01
  • 作者简介:杨再生,1959 年生,男,汉族, 甘肃渭源人,教授级高级工程 师,博士研究生,主要从事油田 的开发生产管理工作。E-mail: yzs_cq@petrochina.com.cn 陈平,1952 年生,男,汉族,四 川成都人,教授,博士生导师,主 要从事定向井、丛式井、水平井、 侧钻水平井等特殊油气井的钻 井技术研究工作。E-mail:chenping@ swpu.edu.cn 杨川,1988 年生,男,汉族,四川 泸州人,硕士研究生,主要从事油 气井过程测量与控制研究工作。 E-mail:yangchuandsg@126.com 马天寿,1987 年生,男,汉族,四 川绵阳人,博士研究生,主要从 事页岩气钻井与随钻测量技 术方面的研究。E-mail:matianshou@ 126.com
  • 基金资助:

    中国石油长庆油田合作项目“苏里格气田水平井长水平段井下工程参数测量与完井管柱适应性研究”(12ZJ–KF–001)。

Mechanism Research of Supercharging Effect Response in Formation
Pressure Testing While Drilling

Yang Zaisheng1,2, Chen Ping1, Yang Chuan1, Ma Tianshou1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology & Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. CNPC Changqing Oilfield Branch Company,Xi′ an,Shaanxi,710000,China
  • Online:2013-06-01 Published:2013-06-01

摘要:

随钻地层压力测试可在钻井的过程中实时提供地层压力信息,达到提高钻井效率,优化钻井工艺的目的。但
由于钻井过程中泥浆滤液侵入地层,造成近井地带地层出现增压效应,增压效应导致随钻地层压力测试结果失真。因
此,针对随钻地层压力测试过程中存在的增压效应,分析增压效应产生的主要原因和形成机理,建立了泥饼形成条件
下增压压力的理论模型,采用该模型模拟了不同地层、地层流体、泥饼和井筒环境下的增压响应规律,揭示了随钻地层
压力测试增压效应的响应机理。研究表明,地层渗透率、泥饼渗透率和过平衡压力的大小是影响增压效应的主要因
素,在地层渗透率较低、泥饼渗透率较高情况下增压效应明显增大。

关键词: 随钻测量, 地层压力, 增压效应, 响应机理, 钻井

Abstract:

While-drilling formation pressure testing can provide real time information of formation pressure,which can improve
the drilling efficiency and optimize drilling technology. When while-drilling formation pressure testing is conducted,mud
cake is formed against the borehole wall because of the mud loss,which is the reason for the supercharging effect around the
wellbore and has a great influence on formation pressure data. This paper has analyzed the primary reason and mechanism of
supercharging effect,and built a theoretical model of supercharging effect in mud cake condition on the basis of supercharging
mechanism. Supercharging effect response rules were simulated under different formation,formation fluent,mud cake and
wellbore conditions,which revealed the response mechanism of supercharging effect in while-drilling formation pressure. Our
research shows the main factors which have a significant influence on supercharging effect are formation permeability,mud
cake permeability and overbalance pressure. Supercharging effect will obviously increase in low formation permeability,high
mud cake permeability conditions.

Key words: measurement while drilling, formation pressure, supercharging effect, response mechanism;drilling