摘要
通过对实验室压汞资料和核磁共振测量资料的对比分析,利用确定压汞孔径分布曲线孔径rc左右边界的方法确定核磁共振T2谱与孔喉半径rc的横向转换系数,利用改进二维分段等面积刻度方法确定其纵向转换系数,使得计算得到的伪毛管压力曲线与实验室压汞测量的毛管压力曲线基本一致。另外,对各种转换系数进行建模,实现在无实验室压汞资料情况下获得定量、连续、高精度的伪毛管压力曲线和孔隙结构参数。将研究成果用于复杂储层评价中,可进行储层分类和估算产能。
According to the comparison between mercury penetration and NMR logging data,the horizontal conversion coefficients between magnetic resonance T2 spectrum and pore throat radius rc are determined by pore size distribution curve of mercury left and right borders,furthermore,the vertical scale conversion coefficients is determined by the improved two-dimensional section equal area method,and then the pseudo-capillary pressure curves determined by magnetic resonance T2 spectrum are almost the same with the result acquired in the lab.Additionally,various conversion coefficients models are established to make sure that quantitative and continuous high precision pseudo-capillary pressure computation and pore size distribution can be obtained with NMR logging data under no mercury penetration data available.The results can be used for complex reservoir evaluation to classify reservoir and evaluate capacity.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2011年第S1期380-386,共7页
Journal of Jilin University：Earth Science Edition
基金
国家"863"计划项目(2006AA060105)
关键词
核磁共振
孔隙结构
毛管压力曲线
转换系数
nuclear magnetic resonance
pore structure
capillary pressure curves
conversion coefficients
