用核磁共振资料评价储层物性、储油能力及渗流能力

THE EVALUATION OF RESERVOIR PHYSICAL PROPERTIES, STORAGE AND PERCOLATION CAPACITY BY MRIL DATA

核磁共振作为一种全新的测井方法,可以直观而准确地提供储层的有效孔隙度、渗透率、束缚水饱和度等参数,并能对储层的水油流动能力及缝隙分析等问题提供可靠的依据。该研究以压汞资料为基础,建立应用核磁共振资料确定储层微观孔隙结构参数的方法。研究表明:T_2分布不仅与孔隙结构密切相关,而且能反映储层的孔隙结构。同时,用核磁共振资料计算孔隙度、渗透率及可动油饱和度等,对解决储层的渗流能力和油田开发提供坚实的基础。

As a new well logging technology, magnetic resonance imaging logging (MRIL) can not only provides effective porosity, permeability, irreducible water saturation and other parameters, but also provide a reliable basis for the study of flowing capacity of water and oil, and aperture analysis etc. Based on capillary pressure data, a method to determine microscopic porous structure parameters can be found by use of MRIL data. Our research shows that T_2 distribution spectrum is not only closely related to porous structure, but also can reflect the porous structure of reservoir. Meanwhile, we can use MRIL data to calculate porosity, permeability, and moveable oil saturation, which is firm foundation for estimating percolation capacity of reservoir and oil field development.