3D Seismic Prospecting Technology for Complex Mountainous Areas in Yingxiongling, Qaidam Basin

Seismic exploration has failed due to the extremely poor seismic geological conditions in Yingxiongling mountainous area. In 2010, high-yield industrial oil flow was obtained in Well Sha-37, promoting a new round of technology research in the area. The seismic data obtained using the broadened line and the hole-geophone joint array to suppress noise was improved a lot. In 2011, high-density 3D seismic exploration technology research was conducted in the area. The quality of 3D seismic data was enhanced a lot, based on using multi-well excitation to improve the effective wave energy, multi-detector array to suppress noise, high-density 3D seismic acquisition, integrative static corrections, and noise separation from signal in multi-domain during seismic processing. According to rolling processing and interpretation of high-density 3D seismic data, surface geological data and well data, No.1 Yingdong structure was effectively implemented as well as the multiple drilling targets were discovered and implemented, which laid a solid material foundation for further exploration and development of oil and gas in the area.