Gas Field Reservoir Prediction In The Northwest Of Sichuan

The Zhongba gas field is located in the east of Jiangyou in the northern of the Sichuan Basin. The terrain is relatively flat in the region, the general elevation of500-650 m.The Zhongba construction is located in the Fault-fold structural belt in the leading edge of the nappe of Longmen Mountains in Sichuan Basin. It is on the basis of the ancient Indo-Yanshanian uplift,secondary structurcal strength, medium depth,integral development and controlled by a fault that is the long axis anticline structure after the transformation of the Himalayan period.It is revealed by Ministry of Geology and Mineral Resources in 1966. The latest seismic data in the region is 19 seismic survey lines, 17 of which is main survey line,2 of which is crossline,explorated in 2001.This Provide a reliable basis for the exploration and development of the area.This work focus two layers.they are Xuyi section and Xuer section in Xujiahe.The first we reprocess pre-stack data offset and timely depth conversion. The fault clearer, more simply breakpoint, the interlayer weak reflection has greatly improved,data quality has been greatly improved. On this basis, through existing geological,seismic, logging, core, production test data and previous research carried out the top and bottom sector of Xusan section, The top boundary of structural interpretation of Xuyi section. the analysis of the structural characteristics of the interface, Especially the fault features, including fault trends and distribution after determining the above,Drawing structural map, through morphology and structure maps determining the correctness of the analysis results, When the results of the analysis to meet the requirements, it is necessary to post-stack wave impedance inversion and high-frequency attenuation attribute analysis to further clarify the reservoir distribution characteristics, the thickness of the sandstone and sand body distribution.