Application of Multiple Seismic Attributes Matching Technology in Mapping Coarse-grain Fan Deposition: A case from Triassic Baikouquan Formation Member 2 in Ma 131 area

Key words: 
• cluster analysis /
• attribute optimization /
• normal distribution /
• multiple-attribute matching /
• Baikouquan

Abstract: Due to the multiple types of conglomerate rock, strong reservoir heterogeneity, it is difficult to establish a relationship between seismic attributes and reservoir. Application of seismic attributes often leads to uncertainty and multiple solutions. In order to surmount the one sideness of single attribute reflecting the distribution of coarse-grain sediments, mutual interference between similar attributes-related information and blindness of seismic facies predicting the distribution of the fan body, a method based on seismic multi-attributes matching technology is proposed:1) established lithology identification scheme; 2) sandy conglomerate ratio was matched based on an attribute optimization and linear regression; 3) RMS attribute to constraining sand boundary; 4) the coarse-grain fan sedimentary facies was mapped according to matching sand ratio contour, lithofacies and logging facies. And application of this method to Baikouquan Formation Member 2 in Ma 131 area shows that it is not only probiding a new way to study coarse-grain deposition, but also providing a reliable basis for rolling exploration and demonstration wells in Mahu sag.