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基于相干的精细断裂刻画技术在顺北地区的应用
Coherence-based fine characterization technology for fractures and its application to Shunbei area
卢志强,王力,杨瑞召,孟令彬,金圣林
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作者单位:中国石化西北油田分公司勘探开发研究院
中文关键字:预处理 本征相干体 计算时窗 断裂刻画 属性融合 塔里木盆地
英文关键字:Preprocessing; Intrinsic coherence cube; Computation window; Fracture characterization; Attribute fusion; Tarim Basin
中文摘要:塔里木盆地顺北地区奥陶系碳酸盐岩油气藏埋藏较深,构造复杂,断裂系统是该地区缝洞型碳酸盐岩储层分布的主要控
制因素。因此对断裂进行了精细刻画:①应用倾角中值滤波、断层增强滤波的预处理方法增强原始地震数据的构造信息;②以第3 代
本征相干技术为依托,探究适合顺北地区的相干计算时窗;③对相干体数据体采用AFE 线性增强以获得更精细准确的断裂刻画效果;
④通过地震属性融合技术,得到以大时窗相干为“断裂骨架”,以小时窗相干为“裂缝充填”的断裂带效果。结果表明:基于相干的
精细断裂刻画技术在顺北地区奥陶系断裂刻画中取得良好的应用效果,结果与钻测井信息吻合良好,显示储层发育与断裂有密切关系,
北东向主干断裂带为油气聚集部位。
英文摘要:Most Ordovician carbonate oil and gas reservoirs, Shunbei area, Tarim Basin, are characterized by deep burial depth and
complex structures. And the distribution of fractured-vuggy carbonate reservoirs is controlled by fractures. So, we implemented some
study on fractures. First, structure information obtained from original seismic data was enhanced by preprocessing dip median filtering
and fault enhancement filtering. Second, coherent computation window suitable for Shunbei area was explored with the support
of Generation 3 intrinsic coherence technology. Third, coherent data volume was enhanced linearly by means of AFE to characterize
fractures more precisely. Finally, a technology of seismic attribute fusion was adopted to achieve the effect of fracture belt with major
window coherence as "fracture framework" whereas minor window coherence as "fracture infilling". Results show that the coherence-
based fine characterization technology has been well applied to characterizing fractures in Ordovician of Shunbei area. Description
results are in good accordance with drilling and logging data, indicating a close relationship between reservoir development and
fractures. And the major NE-striking fracture belt is conducive to hydrocarbon accumulation.
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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
主管单位:中国石油西南油气田公司  主办单位:中国石油西南油气田公司勘探开发研究院
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