测井技术2011，Vol.35Issue(2)：117-121,5.
碳酸盐岩岩样核磁共振实验特征分析
NMR Experiments and Analysis of Carbonate Rock Samples
赵辉 1司马立强 2颜其彬 2李建玉3
作者信息
- 1. 中国石油川庆钻探工程公司地质勘探开发研究院,四川成都610051
- 2. 西南石油大学资源与环境学院,四川成都610500
- 3. 中国石油西部钻探工程公司录井公司,新疆克拉玛依834000
- 折叠
摘要
Abstract
Since there is no systematic experimental study for NMR response of carbonate rock,so it has not been properly applied to some complex reservoirs. Based on a great quantity of NMR core experiments and the pore structure characteristics, analyzed is the effectiveness of reservoir.Experimental studies show that: the Te is shorter, the T2 spectrum information is more complete and integrity. The long waiting time measurement needs to have sufficient waiting time in the development of large size pore reservoirs when using differential spectrum methods to discriminate fluid property. Relaxation time is long for fracture and cavity. Because fracture porosity is generally smaller, the fracture relaxation signal amplitude is also smaller. The T2 spectrum of core with cavity has obviously many long relaxation component signals. In certain grain sizes, the result of NMR small core experiments is in common with the result of NMR core experiments. The model Coates coefficient C value is linearly related to the porosity. T2,cutoff value, which is not a fixed value for carbonate rocks, is inversely proportional to clay content. The precision of porosity and permeability computing by NMR in higher-porosity rock is significantly higher than in lower-porosity. NMR permeability mainly reflects matrix permeability, but can not effectively reflect fracture permeability.关键词
核磁共振/碳酸盐岩/T2谱/差谱/移谱/裂缝/孔洞/粒径/储层参数Key words
nuclear magnetic resonance(NMR)/ carbonate/ T2 spectrum/ differential spectrum/shifted spectrum/ fracture/ cavity/ grain size/ reservoir parameter分类
天文与地球科学引用本文复制引用
赵辉,司马立强,颜其彬,李建玉..碳酸盐岩岩样核磁共振实验特征分析[J].测井技术,2011,35(2):117-121,5.
