The development of high-quality shale in Wufeng-Longmaxi formation in Wulong area is characterized by wide distribution

large thickness

moderate burial depth

high organic matter abundance and moderate thermal evolution. It is a favorable shale gas exploration area. Due to the typical southern China’s mountainous landform in Wulong and the influence of large obstacles such as Wujiang river and nearby towns

the explosive source is limited

resulting in the emergence of the so-called “data skylight”. The advantages of seismic wave generated by the spark source

such as the rich high-frequency information

good waveform repeatability

good time consistency

safe and free from contamination

meet the source requirements for seismic exploration in the Wulong area. After the application of spark source

the coverage fold of large obstacle area increases and the section gap decreases. The energy of the spark source is 200 ~ 800 kJ

which is equivalent to the energy of the 2 ~ 4 kg well gun（14 kg

21 m）. A high quality reflection signal can be seen above 2 s of the single shot record

and the effective frequency band is up to 80 Hz. The spark source can effectively make up for the “data skylight” in Wulong and Tukan town

and meet the requirements of 3D geological exploration.