[1]陈习峰,薛永安,庞全康,等.SN地区辉绿岩下弱信号宽方位采集与成像[J].复杂油气藏,2021,14(04):47-53.[doi:10.16181/j.cnki.fzyqc.2021.04.007]
 CHEN Xifeng,XUE Yongan,PANG Quankang,et al.Wide azimuth acquisition and imaging of weak signals under igneousrocks in SN area[J].Complex Hydrocarbon Reservoirs,2021,14(04):47-53.[doi:10.16181/j.cnki.fzyqc.2021.04.007]
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SN地区辉绿岩下弱信号宽方位采集与成像()
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
14卷
期数:
2021年04期
页码:
47-53
栏目:
油气勘探
出版日期:
2021-12-25

文章信息/Info

Title:
Wide azimuth acquisition and imaging of weak signals under igneousrocks in SN area
作者:
陈习峰1薛永安1庞全康1朱 峰2石一青2
1.中国石化江苏油田分公司物探研究院,江苏 南京 210046;2.中国石化地球物理华东分公司,江苏 扬州 225007
Author(s):
CHEN Xifeng1XUE Yong’an1PANG Quankang1ZHU Feng2SHI Yiqing2
1.Geophysical Research Institute of Jiangsu Oilfield Company,SINOPEC,Nanjing 210046,China;2. East China Branch of Sinopec Geophysics Co.,Ltd.,Yangzhou 225007,China
关键词:
高密度宽方位能量补偿分方位速度分析井约束建模辉绿岩阜宁组高邮凹陷
Keywords:
high densitywide azimuthenergy compensationazimuth velocity analysiswell constraint modelingigneous rockFuning FormationGaoyou Sag
分类号:
P631
DOI:
10.16181/j.cnki.fzyqc.2021.04.007
文献标志码:
A
摘要:
高邮凹陷古近系辉绿岩广泛发育,SN地区最为典型。辉绿岩强反射是该区地震资料信噪比较低的主要原因之一。为了提高辉绿岩下成像质量,不仅需要精准压制多次波等强干扰,还需要加强辉绿岩强能量屏蔽机理分析,进而找到增强岩下弱信号的措施。通过从纵向和横向两个维度分析辉绿岩对岩下地层的地震反射能量影响,充分利用辉绿岩空间分布的局限性和差异性等特性,提出以宽方位为核心的地震资料采集处理一体化解决方案。SN地区宽方位一体化成像攻关及观测系统退化分析证实:覆盖次数有一定保证时,观测方位的进一步增加更为重要。在此基础上做好分频能量补偿和优势方位成像,能够在最大程度上克服辉绿岩对下伏地层的屏蔽作用,实现辉绿岩下弱反射信号较好质量的成像。
Abstract:
The tertiary igneous rocks are widely developed in Gaoyou Sag,and the SN area is the most typical. The strong reflection of igneous rocks is one of the main reasons for the low signal-to-noise ratio of seismic data in this area. In order to improve the imaging quality under igneous rocks,it is not only necessary to accurately suppress strong interference such as multiple waves,but also to strengthen the analysis of the strong energy shielding mechanism of igneous rock,and then find measures to enhance weak signals under the rocks. By analyzing the influence of igneous rocks on the seismic reflection energy of the substrata from the vertical and horizontal dimensions,and making full use of the limitations and differences of the spatial distribution of igneous rocks,it was proposed an integrated solution of seismic data acquisition and processing with wide-azimuth as the core. The wide-azimuth integrated imaging research and the degradation analysis of the observation system in the SN area confirmed that the further increase of observation azimuth is more important when the coverage times are guaranteed to a certain extent. On this basis,frequency division energy compensation and dominant azimuth imaging can overcome the shielding effect of igneous rocks on underlying strata to the greatest extent,and achieve better quality imaging of weak reflection signals under igneous rocks.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2021-05-25;改回日期:2021-09-10。
第一作者简介:陈习峰(1972—),高工,从事地震采集及资料处理研究工作。E-mail:chenxf.jsyt@sinopec.com。
基金项目:中国石化江苏油田分公司科技项目“永安高密度三维精确成像关键处理技术研究及应用”(JS19007)。
更新日期/Last Update: 1900-01-01