The Application of Joint P-Wave and PS Converted Wave in Detecting of Gas Reservoir

P17 THE APPLICATION OF JOINT P-WAVE AND PS CONVERTED WAVE IN DETECTING OF GAS RESERVOIR Abstract 1 The use of converted PS-waves to image reservoirs with low P-wave impedance but high S-wave impedance has attracted considerable interest in offshore exploration. However little progress has been made on the application of converted wave technology to onshore exploration. Here we present an example of using converted-wave for characterizing onshore gas reservoirs in the Ordos basin in Northwest China. The Ordos basin is the largest gas province in China. The main gas reservoirs are upper Paleozoic sandstone that has low or reversed P-wave