白音查干凹陷腾格尔组测井沉积微相研究

从区域沉积背景、岩石学特征和岩-电响应特征分析出发,通过提取反映沉积微相的测井曲线幅值和特征参数,分析测井曲线特征参数与岩性和沉积微相的对应关系,建立白音查干凹陷腾格尔组测井相模式。分析结果表明,白音查干凹陷南部缓坡带腾格尔组,以辫状河三角洲沉积类型为主,可进一步划分为水上分流河道、泛滥平原、水下分流河道、分流间湾、河口坝、前缘席状砂、前缘楔状砂等7个沉积微相。通过单井测井微相、沉积特征及层序地层特征研究,对该区储层沉积体系和沉积相划分进行了完善,为进一步的油气勘探提供了有力依据。

Study on well logging sedimentary microfacies in Tengger Formation, Baiyinchagan Depresion

Through analyzing the corresponding relationship between the log characteristics parameters and sedimentary microfacies, the electrofacies mode of Tengger Formation in Baiyinchagan Depression is established based on the regional sedimentary background, the rock characteristics, the rock-electricity response characteristics and the extraction of logs curve amplitude and the characteristics parameters which can reflect sedimentary mierofacies. The results show that the southern ramp of Tengger Formation in Baiyinchagan Depression takes the braided delta facies as the major style and it can be further divided into 7 sedimentary mierofacies, including upperwater distributary channel, flood plain, underwater distributary channel, interdistributary bay, mouth bar, frontal sheet sand and frontal wedge-shaped sand. The divisions of sedimentary system and sedimentary facies are perfected though analyzing the logging microfacies, sedimentary and sequence stratigraphy characteristics of single well, which can provide an effective basis for the further exploration of oil and gas in this area.