摘要
该文从核磁共振录井的测量机理入手,阐述了岩样T2谱的形态主要受岩性、孔喉大小及孔隙流体性质的影响及关系。以国外核磁共振(NMR)仪器为例,介绍了有效孔隙度的求取、渗透率评价模型、可动、束缚流体饱和度、有效含油饱和度等的计算公式。介绍了岩样原始含油饱和度的测量方法,对样品的处理、检测流程作了分析。文章认为该技术不仅适用于碎屑岩,在碳酸盐岩地层也有效,测量的孔隙度与常规分析相对误差≤10%,是应该大力推广的新技术。
Proceeding from the measuring mechanism of NMR mud logging, the paper expounded the T2 spectrum form is mainly affected by lithology, pore th roat size and pore fluid properties. Taking the abroad NMR instrument as an exam ple, the author introduced the calculation formula for effective porosity, perme ability evaluation model, movable and irreducible fluid saturation, and effectiv e oil-bearing saturation. He also dealed with the measuring method for the origi nal oil-bearing saturation of the rock samples and analyzed the flow sheet of sa mple processing and detecting. The author considered that the technology can not only be used for detrital rock but can also be used effectively for carbonate r ock beds. The relative error of measuring porosity between in this way and in th e conventional analysis is ≤ 10%, so the technology should be spread vigorously .
出处
《录井工程》
2005年第2期30-32,共3页
Mud Logging Engineering
