摘要
断层破碎带可分为断层核部及其周围的诱导裂缝带,研究其内部结构可以帮助评估地下流体在其中的流动效果。为此,以"断层地质模式—地震正演模拟—多属性综合识别"的思路和方法对樊162井区断层破碎带开展研究。结果表明:①断层核部与诱导裂缝带均对原状地层的地震波形产生影响,利用小道间距地震资料识别内部结构效果更好;断层核部在地震频带范围内有响应;诱导裂缝带的波形在低频情况下易被断层核部影响,在高频情况下分辨率变高、干涉效应减弱,据此可以分辨诱导裂缝带。②断层核部振幅弱,在地震频带范围内相干性较差;诱导裂缝带振幅较弱、高频相干性较差;原状地层带相干性好、振幅较强。③利用低频与高频相干的差异区和瞬时振幅属性值可区分断层核部与诱导裂缝带;利用曲率和高频相干属性可识别断层破碎带范围。
A fractured fault zone includes a fault core and surrounding induced fractured zones.Studying its inner structure can help evaluate how underground fluid flows in it.Following the workflow of"from a geological model to seismic forward modeling to multi-attribute comprehensive identification",we studied the fractured fault zone in Well Fan 162 area.The results show that:(1)Both the fault core and the induced fractured zone have impacts on the seismic waveform of the original formation,and seismic data recorded with small trace spacing can better identify the inner structure.The core has responses within the seismic frequency band.The waveform of the induced fractured zone is affected easily by the core at low frequency,while at high frequency,the resolution is higher,and the interference effect is weak,so that the waveform of the induced fracture zone can be distinguished.(2)The amplitude of the fault core is weak,and the coherence is poor within the seismic frequency band.The amplitude of the fractured zone is weak,and the high-frequency coherence is poor.But the undisturbed formation is well coherent and strong in amplitude;(3)The core can be distinguished from the fractured zone by the difference between low-frequency and high-frequency coherence and instantaneous amplitude.The fractured fault zone can be identified by curvature and high-frequency coherence.
作者
杜凯
林承焰
马存飞
任丽华
梁书义
张宗轩
DU Kai;LIN Chengyan;MA Cunfei;REN Lihua;LIANG Shuyi;ZHANG Zongxuan(School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Reservoir Geology Key Laboratory of Shandong Province,Qingdao,Shandong 266580,China;Dongsheng Petroleum Development Group co.Ltd of Shengli Oilfield,Dongying,Shandong 257000,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2020年第3期651-660,473,共11页
Oil Geophysical Prospecting
基金
国家科技重大专项“低渗—致密油藏描述新方法与开发模式”(2017ZX05009-001)
“渤海湾盆地济阳坳陷致密油开发示范工程”(2017ZX05072-002)联合资助
关键词
断层破碎带
地质模式
瞬时振幅
分频相干
RGB融合
地震正演模拟
曲率
fractured fault zone
geological model
instantaneous amplitude
discrete frequency coherency
RGB fusion
seismic forward modeling
curvature attribute
