利用AVO正反演技术识别深水凹陷气层
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摘要
针对深水凹陷莺二段地质条件复杂,地震资料信噪比较低、烃检困难等难点,利用琼东南盆地陵水凹陷地气勘探阶段的钻孔资料及测井资料,应用zoeppritz方程进行射线数字模拟,研究该区典型气层及水层段的反射特征和AVO特征,对深水区坡折带低信噪比资料进行了保幅去噪及道集拉平处理,对常规的碳氢指示因子进行了改进。经结果表明:改进的碳氢指示因子对第三类及第四类AVO异常检测卓有成效,第四类AVO异常对于深水勘探有重要意义。
For the complex geological condition,low S/N seismic data and difficulty in detecting hydrocarbon in Ying2,we applied zoeppritz equation to the drilling and logging data of oil/gas exploration stage of Ling-Shui depression,Qiong dongnan basin for carrying out ray tracing simulation to study the reflection and AVO responding characteristics.We conducted amplitude preserved processing and gathers flatten techniques on slope-break zone in the deep-water area,also improved the tradition hydrocarbon indicator.And thus,the S/N ration of seismic data can be improved and it is also favorable for AVO analysis.The fourth type of AVO anomaly has important significance in exploring in deep water.
For the complex geological condition,low S/N seismic data and difficulty in detecting hydrocarbon in Ying2,we applied zoeppritz equation to the drilling and logging data of oil/gas exploration stage of Ling-Shui depression,Qiong dongnan basin for carrying out ray tracing simulation to study the reflection and AVO responding characteristics.We conducted amplitude preserved processing and gathers flatten techniques on slope-break zone in the deep-water area,also improved the tradition hydrocarbon indicator.And thus,the S/N ration of seismic data can be improved and it is also favorable for AVO analysis.The fourth type of AVO anomaly has important significance in exploring in deep water.
引文
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[10]舒梦程,王真理,张金强,等.AVO属性分析方法的改进及其在煤系地层中的应用[J].地球物理学进展,2010,25(4):1323-1331.
[2]潘仁芳.AVO的内涵与外延[J].石油天然气学报,2006,28(2):50-55.
[3]胡中平.AVO正反演技术[J].勘探地球物理进展,2003,26(5-6):382-386.
[4]杨新菊,马建德.AVO正演模型研究及应用[J].海洋石油,2006,26(3):14-19.
[5]包世海,张秀平,杨玉凤,等.苏里格庙地区AVO气层类型及检测效果[J].油气井测试,2003,12(6):30-31.
[6]郝晓红,王闯,谢春雨,等.流体替代技术及应用分析[J].海洋石油,2008,28(3):1-5.
[7]闵小刚,陈开远,张益明,等.利用AVO正、反演预测深水浊积扇储层[J].石油地球物理勘探,2011,46(6):911-918.
[8]周哲,王真理.最优烃类指标方法研究综述[J].地球物理学进展,2009,24(4):1349-1353.
[9]CASTAGNA JP.Framework for AVO gradient andintercept interpretation[J].Geophysics,1998,63(3):948-956.
[10]舒梦程,王真理,张金强,等.AVO属性分析方法的改进及其在煤系地层中的应用[J].地球物理学进展,2010,25(4):1323-1331.
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