Liu Fulie1, Xu Feng1, Li Zhiyong1, Liang Xianghao2
1. College of Resources and Environment, South-west Petroleum University, Chengdu, Sichuan 610500, China;
2. Tarim Oilfield Company Ltd., PetroChina, Korla, Xinjiang 841000, China
Abstract:Source pattern theoretical analysis is per-formed in this paper using phased-array controltheory and the definition of theoretical signal-to-noise ratio(SNR)and its calculation method arepresented.By changing parameters such as sourceelement number, element interval and wavelengthto control wave path difference between adjacentsource elements,seismic waves generated by eachsource element are stacked in an in-phase mannerin a certain direction, and the theoretical signal-to-noise ratio becomes maximized.Taking advantageof the wave equation forward modeling to verifythe inner relation between theoretical signal-to-noise ratio and the main source pattern parame-tern,we dissect the mechanism that source patterncan suppress noise and improve signal-to-noise rati-o in complex areas.So,the best source pattern pa-rameters including source element number and ele-ment interval can be designed