The Pengshui area,located in the Wuling fold belt at the southeast margin of Sichuan Basin,has a typical karst mountain landform and very complex near-surface structures.Such a geological setting leads to a poor seismic acquisition effect and a low signal to noise ratio (SNR),which seriously affects the oil and gas exploration in this area.This study carried out the excitation tests and research,such as charge type,excitation mode,excitation well depth,and excitation dose,as well as receiving tests on interference wave investigation and geophone types and their combination means on the ground surface in the mountainous areas with exposed carbonate rocks.Furthermore,this study selected a set of excitation and receiving parameters with a strong economy and maneuverability and established the technology used to determine the optimal excitation point location for complex mountainous terrain.Compared with the previous data,this study achieved significantly improved energy,SNR,and first-grade product rate of the newly acquired single-shot records.Moreover,the new data processing profiles obtained in this study show rich information,clear reflection characteristics,and high SNR and display a distinct seismic tectonic pattern of carbonate rock area.
薛野, 杨帆, 刘厚裕, 刘明, 赵苏城, 蓝加达. 彭水地区碳酸盐岩山地地表地震激发接收因素优选及效果[J]. 物探与化探, 2022, 46(3): 608-617.
XUE Ye, YANG Fan, LIU Hou-Yu, LIU Ming, ZHAO Su-Cheng, LAN Jia-Da. Determination of the optimal factors of seismic excitation and reception on the ground surface of carbonate mountainous areas in Pengshui area and its seismic acquisition effects. Geophysical and Geochemical Exploration, 2022, 46(3): 608-617.
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