利用核磁测井资料确定孔隙类型及组分

PORE TYPES AND THEIR COMPOSITIONS DETERMINED BY THE DATA OF NMR LOGGING

孔隙类型的确定及其组分计算对油气田的勘探开发至关重要,传统的铸体薄片、压汞等方法耗时、覆盖率低且成本高。以四川盆地蓬莱地区须家河组须二段为研究层段,采用聚类分析法建立了划分孔隙类型标准、孔隙直径与核磁T2谱的对应关系,然后利用核磁测井确定了孔隙类型并计算出不同孔隙类型的组分含量。结果表明,该方法对认识低孔、低渗储层孔隙微观结构起到了一定作用。

The determination of pore types and the calculation of their components play a very important role in the exploration and development of oil and gas, while the traditional methods such as cast thin-section analyses, mercu- ry injection and so forth are time-consuming, high-cost and low coverage. Taking Xu Member 2 in Xujiahe Forma- tion of Penglai area in Siehuan Basin as an studying example, the corresponding relationship between the standards of pore types, pore diameter and NMR T2 spectrum can be established and divided through the clustering analysis. And then the pore types can be determined and their component contents can be calculated by means of NMR Log- ging. The contrast results between the calculations and thin-section identification show that the method has played a certain role in making clear of the microstructures of the pores in low-porosity and low-permeability reservoir.