桑植-石门区块处于中扬子地块,其中部为湘鄂西褶断带桑植-石门复向斜.该区表层地震地质条件和地下地震地质条件复杂,造成地震资料品质较差,致使勘探对地质构造形态刻画不清 ,难以满足油气勘探的需要.2015年 ,中石化石油工程地球物理有限公司地理地质信息勘查分公司结合以往地震采集经验 ,加大了该区试验及表层调查力度 ,优化了施工方法 ,所得资料达到了提高地震资料信噪比的目的.并在试验资料分析的基础上 ,针对老地震出露和高陡构造的弱信噪比地段进行了分析,所获得的宽线地震采集施工参数及认识值得借鉴.%Both surface and underground seismic geology conditions are complex in Sangzhi -Shimen Area .These complex conditions led to poor quality of seismic data and unclear exploration picture of geologic structure configura-tion ,making oil-gas exploration more difficult .In 2015 ,combined with former seismic acquisition experience ,test and surface investigation were increased in this area and operation process was optimized .As a result ,SNR of the seismic data was improved .In addition ,this paper analyzes weak SNR district based on a study of the test data .A-chieved wide-line seismic acquisition construction parameters are valuable .
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