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

作　　者：卢志强 王力 杨瑞召[2] 孟令彬[2] 金圣林 Lu Zhiqiang;Wang Li;Yang Ruizhao;Meng Lingbin;Jin Shenglin(Exploration and Development Research Institute,Sinopec Northwest Oilfield Company,Urumqi,Xinjiang 830011,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国石化西北油田分公司勘探开发研究院 [2]中国矿业大学(北京)地球科学与测绘工程学院

出　　处：《天然气勘探与开发》2018年第3期20-25,共6页Natural Gas Exploration and Development

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。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.

关 键 词：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 

分 类 号：P618.13[天文地球—矿床学]