鄂尔多斯盆地奥陶系马家沟组马五6段沉积微相测井识别技术与应用

Logging identification technique and application of sedimentary microfacies in the Ordovician Majigou formation member 6 Combination in the Ordos Basin

为了准确识别鄂尔多斯盆地奥陶系马家沟组马五6段沉积微相,研究其平面展布规律,以岩心资料为基础,结合常规测井和成像测井资料,确立马五6段沉积微相的划分标准,建立沉积微相测的井识别技术。将该技术在实际勘探生产中进行应用,对盆地内20余口井进行了沉积微相综合解释,形成了马五6沉积微相平面展布图。同时,利用该方法对有利储层发育区进行了预测,为下一步勘探井位选取提供了技术支撑。

To accurately identify the sedimentary characteristics of Ordovician Majigou Formation Member 6 Combination in the Ordos Basin and study the plane distribution rule of the sedimentary characteristics,based on the study of reservoir structure,the conventional logging is optimized to calculate the mineral composition of the reservoir.Combined with the observation of the core,the image logging response patterns of each sedimentary microfacies are summarized,establishing the micro-facies identification technology for Ordovician middle-lower combination in Ordos Basin based on the conventional and imaging logging.The technology was applied in actual exploration and production.Comprehensive interpretation of sedimentary microfacies was performed on more than 20 wells in the basin,and the maps of the distribution of the favorable sedimentary microfacies in Majiagou Formation Member 6 and Majiagou Formation Member 7 were obtained.The favorable reservoirs were formed.Development areas were forecasted and provided technical support for the selection of the exploration well location.