Gamma ray curve of the Upper Paleozoic in Daniudi gas field can be divided into 4 basic electrofacies types, including bell - shaped, funnel-shaped, box-like and finger - like electrofacies.

大牛地气田上古生界自然伽马曲线划分为四种基础测井相类型:钟形、漏斗形、箱形和指形。