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

应力敏感对东方1—1 气田开发指标的影响

郭平1 *,赵梓寒1,2,汪周华1,雷昊3,杨洋4   

  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. 中国石油西南油气田公司勘探开发研究院,四川成都610041
    3. 中海石油(中国)有限公司湛江分公司,广东湛江524000
    4. 中海石油(中国)有限公司上海分公司,上海徐汇200030
  • 出版日期:2016-08-01 发布日期:2016-08-01
  • 通讯作者: 郭平,E-mail:guopingswpi@vip.sina.com

Influence of Stress-sensitivity on Development Index in Dongfang 1—1#br# Gas Field

GUO Ping1*, ZHAO Zihan1,2, WANG Zhouhua1, LEI Hao3, YANG Yang4   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Research Institute of Petroleum Exploration and Development,Southwest Oil & Gasfield Company,PetroChina,Chengdu,Sichuan 610041,China
    3. Zhanjiang Branch,CNOOC,Zhanjiang,Guangdong 524000,China
    4. Shanghai Branch,CNOOC,Xuhui,Shanghai 200030,China
  • Online:2016-08-01 Published:2016-08-01

摘要:

东方1—1 气田中深层黄流组气藏为典型异常高压气藏,压力系数在1.9~2.3,气藏开发过程中必然存在明显
应力敏感特征。结合室内岩芯实验及数值模拟手段开展系统研究,掌握气藏应力敏感程度及其对气藏生产动态的
影响。研究表明,东方1—1 气田中深层黄流组储层岩芯渗透率与有效应力符合幂函数关系;应力敏感对气井压力分
布、压降漏斗存在一定程度的影响,井底附近压力差异最大;考虑应力敏感时,东方1—1 气田稳产期由5.75 a 降低至
5.00 a、评价期末采出程度降低1.92%。研究成果对合理开发该气藏、确定合理生产制度以及产能评价、计算气藏动态
储量等具有指导意义。

关键词: 异常高压, 应力敏感, 数值模拟, 采出程度, 压降漏斗

Abstract:

Medium deep Huangliu Formation in the Dongfang 1-1 gas field is a typical reservoir of abnormally high pressure.
The pressure coefficient is at 1.9~2.3,so it is stress sensitive in development. By means of laboratory core experiments and
numerical simulation,we carried out a systematic research in order to understand the effect of stress sensibility of this field
on production performance. The research reveals that the variation of confining pressure and permeability showed relatively
regular exponential variations. As stress-sensitivity has influence on gas well pressure distribution and the pressure drop funnel,
differential pressure is the biggest near the well bore. Because of the stress-sensitivity,the period of stabilized production of the
Dongfang gas field becomes 5.00 years from 5.75 years,and the final recovery of this field decreased by 1.92%. These results
offer a very important guidance for researching and designing production performance of a gas reservoir with abnormally high
pressure.

Key words: abnormally high pressure, stress-sensitive, numerical simulation, recovery, pressure drop funnel

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