用成像测井资料描述碳酸盐岩储集层——以车古20潜山为例

碳酸盐岩、火成岩等复杂性油气藏具有岩性、孔隙空间结构复杂、非均质性强等特点,单纯用常规测井技术很难对这些油气藏进行准确评价,必须借助于成像测井等新技术资料。成像测井不仅能直观地显示各种裂缝、溶洞等地质特征,而且还能定量计算裂缝的各种参数,以及研究孔隙结构。这里详细介绍了成像测井新技术裂缝识别、储层划分、裂缝参数计算、孔洞频谱分析等方法,并利用这些方法描述了车古20潜山碳酸盐岩储集层的裂缝,以及溶蚀孔洞发育特征,识别出了此潜山的储层,还结合其它资料,得出了该潜山油气藏的储层分布规律。

Description of Chegu 20 buried-hill reservoir in futai field with imaging well logging data

Conventional well logging techniques are difficult to evaluate correctly some complex reservoirs which are characterized with complicated pore space,special lithology and inhomogeneous layers,such as conglomerate reservoir,carbonate reservoir,igneous reservoir and so on.A new high technology-Imaging well logging(Full borehole formation Micro-resistivity Image) not only can,however,displays all kinds of fractures and vugs,but also calculate some parameters related to fractures and analyze vugs.In the paper,identification of fracture,calculation of fracture parameters and frequency spectrum analysis are introduced in detail.Combined with other data,the characters of fractures and vugs in Chegu 20 Buried-Hill carbonate reservoir are described correctly,and the reservoir distribution rule is summarized.Imaging well logging(Full borehole formation Micro-resistivity Image) proved more advantageous than conventional well loggings in evaluation of complicated lithology reservoirs.