二维核磁共振评价页岩流体饱和度实验仿真

Simulation Experiment of Shale Fluid Saturation Evaluation Using Two-dimensional Nuclear Magnetic Resonance

二维核磁共振(2D NMR)T_(1)-T_(2)测量在页岩油勘探中具有重要优势,但其数据处理与解释过程复杂,涉及抽象的理论知识。设计了一套基于Matlab图形用户界面的2D NMR T_(1)-T_(2)谱储层流体识别与饱和度评价实验仿真。仿真系统包括地层T_(1)-T_(2)谱模型构建、回波数据正演、回波数据反演以及流体识别与饱和度评价模块。通过输入不同参数,模拟得到页岩地层的T_(1)-T_(2)谱模型、回波数据、T_(1)-T_(2)谱反演结果以及页岩储层流体识别与饱和度评价结果。实验以直观、实用的方式向学生展示了基于2D NMR T_(1)-T_(2)谱的页岩储层流体识别与饱和度评价过程,增强学生对NMR数据处理与解释方法的理解,提高NMR教学效果。

theoretical knowledge,are complicated.To address this,a MATLAB GUI-based simulation experiment is developed for reservoir fluid identification and saturation evaluation using 2D NMR T_(1)-T_(2)map.The experiment encompasses four modules:construction of the geological T_(1)-T_(2)map model,forward simulation of echo data,inversion of echo data,and fluid identification and saturation evaluation.By inputing different parameters in the simulation,one can obtain the simulation outcomes including T_(1)-T_(2)map models,echo data,T_(1)-T_(2)map inversion results,and shale reservoir fluid identification and saturation evaluation outcomes.The simulation experiment intuitively and practically demonstrates the process of shale reservoir fluid identification and saturation evaluation based on 2D NMR T_(1)-T_(2)map,enhances students’comprehension of NMR data processing and interpretation techniques,and elevates the overall efficacy of NMR instruction.