自然伽玛侧井信息研究沉积微相—以扇三角洲为例

自然伽玛测井是一种传统的测井方法，已往只用它划分岩性和定性地分析沉积相。本文主要介绍应用自然伽玛测井信息定量分析和划分扇三角洲沉积微相带。采用一定的数学方法和计算机手段建立识别扇三角洲沉积微相带的频率和偏差模式图，并利用计算机自动判别和划分微相带，绘制相分布图。这一方法具有广泛的实用价值。

QUANTITATIVE ANALYSIS OF FAN-DELTAIC MICROFACIES BY MEANS OF NATURAL GAMMA RAY LOG

Natural gamma-ray loging is one of the conventional loging methods used in petroleum industry. It can be used to identify rock lithology and analyze sedimentary facies quantitatively. This paper mainly describes a methld for quantitative analysis and recognition of fan-deltaic microfacies by means of the natural gamma ray log. Certain computer mathematical methods are adopted to establish the frequency and deviation patterns for the recognition of fan-deltaic sedimentary microfacies. This makes it possible for a computer to recognize and divide microfacies zones, and plot facies relationship maps and make quantitative analysis of sedimentary facies.The method introduced in this paper is of wide practical value in petroleum industry.