[1]刘立民,陈习峰,田 坤,等.苏北盆地火成岩发育区复杂断块精确成像对策[J].复杂油气藏,2014,(01):25.
　Liu Limin,Chen Xifeng,Tian Kun,et al.Strategies of precision imaging for complex fault block of igneous rock developing area in Subei basin[J].Complex Hydrocarbon Reservoirs,2014,(01):25.
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苏北盆地火成岩发育区复杂断块精确成像对策
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
期数:
2014年01期
页码:
25
栏目:
油气勘探
出版日期:
2014-03-25

文章信息/Info

Title:
Strategies of precision imaging for complex fault block of igneous rock developing area in Subei basin
作者:
刘立民; 陈习峰; 田 坤; 石生林
中国石化江苏油田分公司物探技术研究院,江苏 南京 210046
Author(s):
Liu Limin; Chen Xifeng; Tian Kun; Shi Shenglin
Geophysical Research Institute of Jiangsu Oilfield Company,SINOPEC, Nanjing,Jiangsu 210046
关键词:
苏北盆地 复杂断块 火成岩成像 速度模型 逆时偏移
Keywords:
Subei basin;  complex fault block;  igneous rock imaging;  velocity model;  reverse time migration
分类号:
P631.4
摘要:
叠前深度偏移是解决构造及速度场双复杂区成像的有效方法,为了验证克希霍夫积分法叠前深度偏移及逆时偏移在苏北盆地火成岩发育区复杂断块的精确成像能力,进行了基于苏北盆火成岩区复杂断块模型的成像试验,结果显示:在提供可靠的高频近似速度场的情况下,逆时偏移优势明显,反之,则克希霍夫积分法叠前深度偏移是可行的选择。为验证实验结果,选取信噪比较高的实际数据建立可靠的高频速度场并进行成像处理,结果证实:逆时偏移在断块成像及火成岩下目的层成像方面,效果明显优于克希霍夫积分法叠前深度偏移。因此,苏北盆地火成岩区复杂断块精确成像的方法选择,应根据数据信噪比而定,信噪比高,可建立较准确的高频速度场,宜采用逆时偏移; 信噪比低则采用克希霍夫叠前深度偏移。
Abstract:
Pre-stack depth migration is an effective imaging method for complex structure and velocity field zones.In order to verify precise imaging ability of Kirchhoff’s pre-stack depth migration(KPSDM)and the reverse-time migration(RTM),imaging tests were carried out based on the velocity model for complex fault block of igneous area in Subei basin.Experimental results showed that under the condition of reliable high-frequency velocity field,RTM has obvious advantage in imaging of fault blocks,otherwise,KPSDM was a viable option.In order to verify above experimental results,by selecting seismic data with higher signal to noise ratio(SNR),a reliable high-frequency velocity field was established,and the imaging processing was carried out.The results showed that RTM has obvious advantage over KPSDM in the aspect of improving imaging results of fault blocks and target layer under igneous rock.Therefore,imaging methods for fault blocks of igneous zone were selected by SNR of seismic data.If seismic data have high SNR,a more accurate high frequency velocity field can be set up.Thus RTM can achieve precise imaging for target layer.If the seismic data have low SNR,KPSDM will become a good choice.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2013-07-17; 改回日期:2013-10-16
作者简介:刘立民(1980—),硕士,现主要从事地震资料处理和方法研究工作。电话:025-83503084,E-mail: liulm.jsyt@sinopec.com。
项目攻关:江苏石油勘探局(JS12011)
更新日期/Last Update: 2014-03-25