介电扫描测井在复杂碳酸盐岩储集层评价中的应用

四川盆地龙王庙组气藏是中国目前最大的海相碳酸盐岩整装气藏，由于该气藏储集层储集空间类型多样、非均质性强，加之受岩性影响，背景电阻率较高，致使储集层含气饱和度准确计算和流体识别难度较大。通过对斯伦贝谢新一代多频介电扫描测井ADT（Array Dielectric Tool）的基本原理和方法的介绍，结合龙王庙组气藏ADT采集资料和介电扫描测井所提供的地层介电常数、含水孔隙度，以及介电频散技术反演得到连续的胶结指数，对该气藏储集层孔隙结构、含气饱和度和流体性质进行探索性研究，评价结果与岩心半渗透隔板实验、密闭取心和试油结论一致。

Application of Array Dielectric Tool to Complex Carbonate Reservoir Evaluation

Longwangmiao gas reservoir in Sichuan basin is the largest integrated marine carbonate gas reservoir in China. It is characterized by various types of reservoir spaces, strong heterogeneity, high background resisitivity, and strongly influenced by its lithology. So it is difficult to accurately calculate the gas saturation and identify the fluid types. This paper presents the array dielectric tool (ADT), a new dielectric log developed from Schlumberger, including the basic principle and the approach, and makes the exploratory studies of the pore structure, gas saturation and fluid property of this reservoir by means of the ADT-collected data from Longwangmiao gas reservoir, such as the dielectric constant, water-bearing porosity and the continuously variable cementation index (m) obtained by dielectric dispersion inversion. The results are in accordance with those from the semi-permeable barrier experiment of cores, the sealed coring and the oil production test