今天是2017年09月22日

核磁共振技术在非常规油气藏的应用基础

DOI:10.3799/dqkx.2017.506

作者:杨正明,张亚蒲,李海波,郑兴范,雷启鸿

联系地址:中国石油勘探开发研究院,北京 100083

摘要:核磁共振技术在非常规油气藏应用解释中有较多争议.结合渗流流体的概念,提出了针对核磁共振图谱解释流体动用性质的新方法,并应用于非常规油气藏.研究表明:致密油和致密砂岩气藏岩心的核磁共振图谱左峰和右峰是连续而不是截然分开的,说明难动用流体与易动用流体的性质是连续渐变的,不是独立分开的;而页岩和煤层气藏岩心核磁共振图谱则反之.在非常规油气藏岩心中,难动用流体占主导地位,致密油和致密砂岩气藏岩心的易动用流体多于页岩和煤层气藏岩心.致密油和致密砂岩气藏的采出程度提高取决于易动用流体的采出;而页岩和煤层气藏的采出程度提高则取决于难动用流体的采出.

关键字:非常规油气藏;核磁共振;流体;采出程度;石油地质

Application Basis of Nuclear Magnetic Resonance Technology in the Unconventional Reservoirs

Author:Yang Zhengming, Zhang Yapu, Li Haibo, Zheng Xingfan, Lei Qihong

Author Address:PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

Abstract:The application interpretation of nuclear magnetic resonance (NMR) technology in unconventional reservoirs has been very controversial. A new interpretation method of NMR spectrum is proposed and applied to the unconventional reservoirs combining with the concept of seepage fluid. The results show that the left peak and right peak of nuclear magnetic resonance spectrum in tight oil and gas sandstone cores are continuous rather than entirely separated, which indicates that the properties of the differences between the easy to produce fluid and the difficult to produce fluid is not completely separated. But the nuclear magnetic resonance spectrum of shale and coal bed methane (CBM) reservoir cores is opposite to the above mentioned results. In cores of unconventional reservoirs, the difficult to produce fluid dominates, and the easy to produce fluid in tight oil and gas sandstone cores is more than that of shale and CBM reservoir cores. The recovery degree of tight oil and gas sandstone reservoirs mainly increases in the easy to produce fluid extraction, but the recovery degree of shale and CBM reservoirs mainly increases in the difficult to produce fluid extraction.

Keyword:unconventional reservoirs; nuclear magnetic resonance; fluid; recovery degree; petroleum geology.

 

【点击数:171【下载数:137】【PDF预览】


作者简介:杨正明(1969-),男,高级工程师,主要从事低渗/致密油气田物理模拟、渗流理论和三次采油方面的研究工作.ORCID: 0000-0001-8855-2720. E-mail: yzhm69@petrochina.com.cn

参考文献