Seismic fine depiction of the thin sand distribution of the Putaohua Reservoir in the Well C51 Area
CHEN Hongzhu1, WANG Yanchun1, GAO Yang2
1. School of Geophysics and Information Technology, China University of Geosciences(Beijing), Beijing 100083, China; 2. Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources of the People's Republic of China, Xi'an, Shaanxi 710021, China
Abstract：The Putaohua Reservoir in the Well C51 Area is of delta-front facies, and 2 sand groups (PⅠ1 and PⅠ2) are vertically developed with the average thicknesses 2m and 5m respectively.Although these sand groups are clearly distinguished on the well drilling data, their distribution cannot be identified on seismic data due to its low resolution.To solve the problem, seismic information and attributes are selected based on the sand groups of 18 wells.Sand group reflections are determined at wells and traced along horizons on seismic slices.Then seismic attributes of sand groups are extracted and optimized.After that, the attributes are conversed to sedimentary micro-facies, and the constrained sedimentary micro-facies geo-statistical inversion is carried out to increase the vertical resolution.Finally, the distribution of 2 sand groups is predicted.According to our prediction, PⅠ2 is thicker, and is suitable for gas base building.
陈泓竹, 王彦春, 高阳. C51井区葡萄花储层薄砂体展布地震精细刻画[J]. 石油地球物理勘探, 2019, 54(3): 600-607,633.
CHEN Hongzhu, WANG Yanchun, GAO Yang. Seismic fine depiction of the thin sand distribution of the Putaohua Reservoir in the Well C51 Area. Oil Geophysical Prospecting, 2019, 54(3): 600-607,633.
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