The Numerical Simulation Of Seismic Exploration And Study On The Effect Of Excitation

With the acceleration of China’s economic development, the growing demand for oil and gas resources. Metallogenic conditions of oil and gas in our country is not worse than many resource-rich countries, few large oil and gas resources are found in recent years.The development of our country increasingly dependent on the material energy. In order to improve the situation, so it is urgent to improve the level of seismic exploration in today’s. The level of seismic exploration is largely constrained by the source technology, the development of source technologies also contributed to some extent the level of seismic exploration progress.Currently,the explosive as land seismic exploration source uses the common way of excitation. Compared with the other source, it inspired seismic wave has high pulse of energy and good properties. In seismic exploration for carbonate exposed area of sichuan basin caused by karst and rock mass structure development reflection seismic wave signal is weak, the problem of low signal-to-noise ratio.From dynamite source, study and put forward more reasonable source under the scheme to improve the seismic wave energy, to strengthen the deep seismic reflection seismic signal, improving the quality of seismic record, enhance signal-to-noise ratio. This paper made the following work:1. Through the study of explosion shock wave, explore the formation characteristics of seismic wave. According to stress wave in rock mass produced by the stress state, divided into conventional bar charge in carbonate rock explosion stress range partition and explored the research of seismic wave propagation characteristics.2.By single well numerical simulation of single charge explosion excitation under a certain depth, considering the ghost effect on surface of rock under the influence of the seismic wave energy, find out the appropriate excitation well depth makes certain conditions under seismic excitation energy reached maximum.3.In certain conditions in diameter,through the numerical simulation analysis of single charge explosion when different doses excitation effects on seismic wave. Determine the appropriate dose of a single excitation kits.