—二维核磁共振岩心测试技术与应用

Core testing technology with - two-dimensional nuclear magnetic resonance and its application

陈瑶 张宫 郑国庆 彭庆 覃莹瑶

CHEN Yao ZHANG Gong ZHENG Guoqing PENG Qing Qin Yingyao

长江大学 油气资源与勘探技术教育部重点实验室, 武汉 430100 中国石油 新疆油田分公司 勘探开发研究院, 新疆 克拉玛依 834000 中国石油 新疆油田分公司 陆梁油田作业区, 新疆 克拉玛依 834000

Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education, Yangtze University, Wuhan, Hubei 430100, China Exploration and Development Research Institute, Xinjiang Oilfield, CNPC, Karamay, Xinjiang 834000, China Luliang Oilfield Operation Area, Xinjiang Oilfield, CNPC, Karamay, Xinjiang 834000, China

作为一种无损、高效、非侵入式的检测手段，核磁共振技术一直在油气岩心分析中发挥着重要作用。但传统核磁共振（NMR）检测结果（T2谱）反映的是岩石孔隙的大小分布特征，孔隙的连通性无法直接被表征。通过对实验流程和数据处理方法的改进，在标准核磁T2谱的基础上，增加毛管压力（Pc）维度，得到T2—Pc二维核磁实验图谱，从另一个视角解决了核磁实验不能反映孔隙连通性的问题。实际应用表明，T2—Pc二维核磁实验不但能够对储层连通性进行直观评价，也可以得到不同生产压差下的束缚水饱和度，从而为油气勘探开发提供更多储层信息。

As a non-destructive, efficient and non-invasive detection method, nuclear magnetic resonance (NMR) technology has always played an important role in the analysis of oil and gas cores, but the traditional nuclear magnetic resonance detection results (T2 spectrum) only reflect the size distribution characteristics of rock pores, while the connectivity of pores cannot be directly characterized. Through the improvement of experimental procedures and data processing methods of the standard nuclear magnetic T2 spectrum, the capillary pressure dimension is added in to obtain the T2-Pc two-dimensional nuclear magnetic experiment spectrum, which solves the problem that the nuclear magnetic experiment cannot reflect the pore connectivity. Practical application shows that the T2-Pc two-dimensional nuclear magnetic experiment can not only intuitively evaluate reservoir connectivity, but also obtain bound water saturation under different production pressure differentials, thus providing more reservoir information for oil and gas exploration and development.

湖北省教育厅科学研究计划项目 Q20181320

https://doi.org/10.11781/sysydz202103549