关键词: 四川盆地, 九龙山构造, 构造解释, 储层预测, 流体检测, 裂缝预测

Abstract: To further expand the exploration results in shallow layers of Jiulong Mountain, a series of technology research about structure interpretation, reservoir prediction, fluid detection and fracture forecast are conducted by using 3-D seismic data. Some achievements have been made. Firstly, favorable sedimentary facies distribution is forecasted through paleogeomorphology restoration and seismic attribute analysis. Secondly, thickness, porosity of reservoir is forecasted through pseudo-acoustic inversion, wave impedance inversion, and gamma inversion. Zhenzhuchong reservoirs were mainly developed in the middle and southeast of the study area; the thick area of the upper of the second member of Xujiahe Formation is mainly distributed in the northwest of the study area, of which the distribution law coincides with the geological reality. Thirdly, gas potential and fractures are forecasted with poststack and prestack seismic data. Field application shows that major gas zones and fracture development areas as well as reservoir distribution areas of all target layers own better overlapping features.

Key words: Sichuan Basin, Jiulong Mountain structure, structure interpretation, reservoir prediction, fluid detection, fracture forecast