南海南部礼乐海区二维地震资料的高分辨率处理方法
|
摘要
南海南部礼乐海区以其丰富的油气资源储备成为我国油气勘探的后备区,目前勘探程度低,地震资料较少,仅有少量的二维地震资料。由于该区地形复杂、水深变化范围大,因此在地震数据中发育着多种类型的干扰波,加之该批数据道数少、信噪比低,上述因素都成为高分辨率处理的难点。针对该区地震数据的特征,采用多种手段的真振幅恢复技术以及异常振幅压制等预处理方法;采用串联反褶积提高了资料的分辨率;根据多次波的类型分别采用τ-p域预测反褶积、速度滤波、内切除等组合方法压制多次波。从资料处理的效果来看,使得浅、中、深层能量得到平衡,多次波等各类干扰波得到了较好的压制,资料的信噪比和分辨率都得到了提高,最后得到了高分辨率的地震剖面。
Lile sea area of the southern South China Sea has become an important prospective area of oil and gas exploration because of its abundant resources. At present, the exploration level of Lile sea area is low, and there are only two-dimensional seismic data of a few survey lines. Due to complex terrains and large changes of water depth, multiform interferential waves can be commonly distinguished from these seismic data. Moreover, the trace number of shot gather is small, and the S/N ration of data is low. Above factors are of disadvantage to high-resolution processing of seismic data. According to the characteristics of seismic data in the area, various means have been used for true amplitude recovery and abnormal amplitude suppression in the pretreatment. Series deconvolution methods have been used to enhance the resolution of the seismic data; τ-p domain predictive deconvolution, velocity filtering and inner muting have been adopted for multiples suppression based on the types of multiples. From the result of processing, it can be found that the energy of shallow, middle and deep layers is proportioned. Interferential waves such as multiples have been well suppressed, and the S/N ratio and resolution of seismic data have been improved. High-resolution seismic stacked profiles have been achieved finally.
Lile sea area of the southern South China Sea has become an important prospective area of oil and gas exploration because of its abundant resources. At present, the exploration level of Lile sea area is low, and there are only two-dimensional seismic data of a few survey lines. Due to complex terrains and large changes of water depth, multiform interferential waves can be commonly distinguished from these seismic data. Moreover, the trace number of shot gather is small, and the S/N ration of data is low. Above factors are of disadvantage to high-resolution processing of seismic data. According to the characteristics of seismic data in the area, various means have been used for true amplitude recovery and abnormal amplitude suppression in the pretreatment. Series deconvolution methods have been used to enhance the resolution of the seismic data; τ-p domain predictive deconvolution, velocity filtering and inner muting have been adopted for multiples suppression based on the types of multiples. From the result of processing, it can be found that the energy of shallow, middle and deep layers is proportioned. Interferential waves such as multiples have been well suppressed, and the S/N ratio and resolution of seismic data have been improved. High-resolution seismic stacked profiles have been achieved finally.
引文
陈见伟,胡冰.2008.琼东南深海盆地三维地震多次波组合压制方法[J].石油物探,47(1):55–60.
金庆焕,李唐根.2002.南沙海域区域地质构造[J].海洋地质与第四纪地质,20(1):1–8.
李继光.2003.低信噪比地震资料处理技术研究[D].青岛:中国海洋大学:61
林秋金,阎贫,于宏,等.2012.潮汕坳陷多次波组合压制技术研究[J].热带海洋学报,31(1):55–61.
马继涛,MRINAL K S,陈小宏.2009.平面波域反数据处理压制多次波方法研究[J].地球物理学报,52(3):808–816.
孙龙涛,孙珍,周蒂,刘海龄.2008.南沙海区礼乐盆地沉积地层与构造特征分析[J].大地构造与成矿学,32(2):151–158.
夏戡原.1996.南沙群岛及其邻近海区地质地球物理与油气资源[M].北京:科学出版社,113–114
阎贫,刘海龄,邓辉.2005.南沙地区下第三系沉积特征及其与含油气性的关系[J].大地构造与成矿学,29(3):391–402.
张志军,王修田.2006.用奇异值分解方法衰减多次波[J].中国海洋大学学报:自然科学版,36(增Ⅱ):110–114.
CORNING P R,GOODRUM R.周吉面译.1988.τ-p域多次波消除[J].石油物探译丛,12:55–61
TAYLOR B,HAYES D E.1980.The tectonic evolution of theSouth China Basin[J].Geophys Monogr Ser,23:89–104.
金庆焕,李唐根.2002.南沙海域区域地质构造[J].海洋地质与第四纪地质,20(1):1–8.
李继光.2003.低信噪比地震资料处理技术研究[D].青岛:中国海洋大学:61
林秋金,阎贫,于宏,等.2012.潮汕坳陷多次波组合压制技术研究[J].热带海洋学报,31(1):55–61.
马继涛,MRINAL K S,陈小宏.2009.平面波域反数据处理压制多次波方法研究[J].地球物理学报,52(3):808–816.
孙龙涛,孙珍,周蒂,刘海龄.2008.南沙海区礼乐盆地沉积地层与构造特征分析[J].大地构造与成矿学,32(2):151–158.
夏戡原.1996.南沙群岛及其邻近海区地质地球物理与油气资源[M].北京:科学出版社,113–114
阎贫,刘海龄,邓辉.2005.南沙地区下第三系沉积特征及其与含油气性的关系[J].大地构造与成矿学,29(3):391–402.
张志军,王修田.2006.用奇异值分解方法衰减多次波[J].中国海洋大学学报:自然科学版,36(增Ⅱ):110–114.
CORNING P R,GOODRUM R.周吉面译.1988.τ-p域多次波消除[J].石油物探译丛,12:55–61
TAYLOR B,HAYES D E.1980.The tectonic evolution of theSouth China Basin[J].Geophys Monogr Ser,23:89–104.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心