核磁共振技术在页岩油气储层评价中的应用

NMR technology in reservoir evaluation for shale oil and gas

孙中良 李志明 申宝剑 祝庆敏 李楚雄

SUN Zhongliang LI Zhiming SHEN Baojian ZHU Qingmin LI Chuxiong

中国石化 石油勘探开发研究院 无锡石油地质研究所, 江苏 无锡 214126 页岩油气富集机理与有效开发国家重点实验室, 江苏 无锡 214126 国家能源页岩油研发中心, 江苏 无锡 214126 中国石化油气成藏重点实验室, 江苏 无锡 214126

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu 214126, China State Energy Center for Shale Oil Research and Development, Wuxi, Jiangsu 214126, China Key Laboratory of Hydrocarbon Accumulation Mechanism, SINOPEC, Wuxi, Jiangsu 214126, China

自非常规油气业务开展以来，核磁共振技术因其无损、灵敏、快速等优点，已发展为页岩油气储层评价的重要技术方法之一。该文从核磁共振技术的实验原理出发，着重综述了目前核磁共振技术在全尺度一体化表征页岩孔缝分布、孔隙度、孔隙润湿性、流体可动性及流体分类等页岩油气储层研究难点方面的应用。除此之外，在描述水的迁移、甲烷吸附和解吸以及二氧化碳置换等流体行为，获取有机质信息、油页岩界面面积，判断有机孔、无机孔，分析孔隙连通性，获取高黏性沥青和干酪根有关信息等方面的应用也做了简单介绍。最后分析了核磁共振分析技术目前存在的不足以及在页岩储层评价中的发展趋势。

Since the development of unconventional oil and gas business, Nuclear Magnetic Resonance (NMR) technology has been gradually applied in the evaluation for unconventional reservoirs due to the merits such as nondestructive, sensitive and fast, this technology has become one of the important methods in shale oil and gas reservoir evaluation. Therefore, based on the experimental principle of NMR technology, this paper focuses on the applications of NMR technology in the full-scale integrated characterization of pore and fracture distribution, characterization of shale porosity, pore wettability, fluid mobility and fluid classification, etc. In addition, the applications of NMR in describing water migration, methane adsorption and desorption, carbon dioxide displacement and other fluid behaviors, obtaining organic matter information, oil shale interface area, determining organic pores and inorganic pores, analyzing pore connectivity, and obtaining information about high-viscosity asphalt and kerogen are also briefly reviewed. Finally, the shortcomings of NMR and the development trend of NMR in shale reservoir evaluation are analyzed.

国家自然科学基金项目 42090022;中国石化科技开发部项目 P20049-1

https://doi.org/10.11781/sysydz202205930