摘要
目前国内对深盆气的研究主要集中在深盆气的地质理论和地质预测方法上,对于深盆气的地震响应特征以及怎样利用这些地震异常特征来预测和评价深盆气等方面还缺乏系统分析和认识。在分析深盆气地质特征的基础上,开展了对其地震响应特征和预测方法的研究及探讨。依据深盆气地质特征的特殊性,认为深盆气一般的地震特征是"平点强振幅、低频条带状、波形复杂化、速度异常面";针对深盆气的地震响应特征,结合国外的预测技术和参照常规天然气的识别方法,把利用地震技术来预测深盆气的方法分为了5类(振幅类、衰减类、波形类、速度类和综合预测类)共20种,建立了深盆气的地震预测方法体系;且重点分析了其中8种针对性强、识别效果好的地震预测方法。
On the basis of analyzing geologic characters of deep-basin gas,the characters and prediction methods of seismic response were studied and discussed.Based on the speciality of deep-basin gas geologic characters,it was considered that the seismic characters of deep-basin gas included 'strong amplitude in flat spot and low frequency ribbon,complex wave form and abnormal velocity'.In allusion to the seismic response characters of deep-basin gas,in combination with the predicting techniques abroad and conventional gas recognition method,the methods for predicting deep-basin gas with seismic technique are divided into 5 categories(amplitude,attenuation,wave form,velocity and comprehensive prediction)involving 20 types in total.Systematical methods are established for deep-basin gas prediction.Eight seismic prediction methods with obvious effect and recognition efficiency are analyzed.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2007年第6期69-73,共5页
Journal of Oil and Gas Technology
基金
国家自然科学基金项目(40272062)和(40472073)
关键词
深盆气
地质特征
地震特征
地震预测方法
deep-basin gas
geologic character
seismic character
seismic prediction method
