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《Well Logging Technology》 2009-04
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Realization Process and Methods for Quantitative Identification of Sedimentary Microfacies

YU Yun-yan1,BIAN Cong-sheng2(1.China University of Geosciences,Beijing 100083,China;2.PetroChina Exploration and Development Research Institute,Beijing 100083,China)  
To quickly and accurately identify sedimentary microfacies by well logging curves is an urgent problem in oilfield development.This paper provides automatic identification methods for logging microfacies and automatic creation methods for sedimentary microfacies maps.Five important parameters have been considered as indicators of microfacies,including lithology,sand percentage,porosity,cycle shapes of logging curves and coarseness of the logging curves.Based on microfacies types recognition in the oilfield,built is a discriminant criterion for well logging curves and determining sedimentary microfacies automaticly.Based on the single sandbed log microfacies identification,the deterministic algorithm and random simulation mapping method are used for automatic sedimentary microfacies mappings,and finally modify and complete the automatic computer mappings.The example of Da'anbei oilfield sedimentary microfacies research in the Songliao Basin is given to explain how to use this method.The results show this method is effective.
【CateGory Index】: P618.13
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