Abstract：The gas reservoirs in Jiyang depression mainly accumulate in Tertiary and mid and upper parts of Paleogene,where the buried depths are 800m～1800m.The reservoirs are characters of a large number,thin thickness and small area.The gas-enriched characters in mid and shallow layers and changed petrophysical property of reservoirs before and after gas-bearing provided conditions for using seismic methods for detection and description.Be cause the gas reservoirs exist in a large set of mud rocks,the gas-bearing formation has bright feature;the mid gas reservoirs are more complex than the shallow ones,mainly are structural gas reservoirs,generally existing gas/oil or gas/water interfaces,which mainly have the flatten spot feature for reflections.The velocities and densities of mid and shallow gas reservoirs are all greater than the surrounding beds,thus the distinct AVO effect exists.Using abovementioned reflections feature,the gas reservoirs have been successfully predicted.
于建国, 韩文功, 于正军, 路慎强, 王金铎. 济阳拗陷孔店组烃源岩的地震预测方法[J]. 石油地球物理勘探, 2005, 40(3): 318-321,338.
Yu Jian-guo, Han Wen-gong, Yu Zheng-jun, Lu Shen-qiang, Wang Jin-duo. Seismic prediction of Kongdian Group source rock in Jiyang depression. OGP, 2005, 40(3): 318-321,338.
