辫状河流相薄砂体地震子波效应和识别方法
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摘要
在地震资料频率一定的情况下,地震子波旁瓣效应会增加薄砂岩识别和解释的难度。为了研究子波旁瓣的影响程度,设计系列正演模型,利用不同频率的零相位雷克子波合成人工地震剖面,确定砂体位置、频率与地震子波旁瓣效应的关系,研究振幅类属性与薄砂体描述的关系。结果表明,综合利用多频带地震剖面和振幅类属性,可以可靠地解释和描述厚度大于1/8波长的辫状河流相薄砂岩储层。
Under a fixed seismic frequency,wavelet side lobes may increase the difficulty of interpreting and recognizing thin sand bodies.To investigate the impacts of wavelet side lobe effects,we design a series of forward models and produce synthetic seismic profiles using zero phase Ricker wavelets of different frequencies.The purpose is to identify the relationship of sand body location and frequency with side lobe effects.This study also aims at exploring the relationship between amplitude attributes and the description of thin sand bodies.The results show that,an integrated use of multi-frequency profile and amplitude attributes can reliably interpret and describe thin sand bodies of braided river facies which are thicker than 1/8 wavelength.
Under a fixed seismic frequency,wavelet side lobes may increase the difficulty of interpreting and recognizing thin sand bodies.To investigate the impacts of wavelet side lobe effects,we design a series of forward models and produce synthetic seismic profiles using zero phase Ricker wavelets of different frequencies.The purpose is to identify the relationship of sand body location and frequency with side lobe effects.This study also aims at exploring the relationship between amplitude attributes and the description of thin sand bodies.The results show that,an integrated use of multi-frequency profile and amplitude attributes can reliably interpret and describe thin sand bodies of braided river facies which are thicker than 1/8 wavelength.
引文
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2徐怀民,蔡忠,侯加根.地震信息对薄砂岩储层特性的描述[J].地质论评,1998,39(5):433~441
3张军华,陆文志,王月英.薄层地球物理特征再认识[J].石油物探,2004,43(6):541~546
4凌云研究组.地震分辨率极限问题的研究[J].石油地球物理勘探,2004,39(1):436~442
5袁红军.东营凹陷博兴洼陷滨浅湖相滩坝砂岩储层预测[J].石油与天然气地质,2007,28(4):497~503
6王洪艳,夏连军,胡云.复杂地区薄互储层属性应用技术研究[J].石油物探,2004,43(增刊):51~52
7于建国,姜秀清.地震属性优化在储层预测中的应用[J].石油与天然气地质,2003,24(3):291~295
8杜劲松,韩福民,陈发亮,等.薄互层正演模拟分析及其应用[J].断块油气田,2004,11(6):4~6
9石世革.黄骅坳陷板桥凹陷古近系沙一段中部层序地层学研究与岩性油气藏勘探[J].石油与天然气地质,2008,29(3):320~325
10崔永谦,冯小英,李贤平,等.饶阳凹陷马西地区砂、泥岩薄互层高精度储层预测的实践[J].勘探技术,2008,(2):67~70
11石玉,李宗杰.塔河油田三叠系非构造圈闭识别与评价技术[J].石油与天然气评价,2008,29(1):53~60
12陈君,陈发亮,郑玲,等.砂泥岩薄互层预测技术在东濮凹陷的应用[J].石油钻采工艺,2009,31(增刊):44~47
13崔永谦,秦凤启,卢永和,等.河流相沉积储层地震精细预测方法研究与应用———以渤海湾盆地冀中坳陷古近系河道砂为例[J].石油与天然气地质,2009,30(5):668~672
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