利用多方位地震采集资料预测BZ28-1油田裂缝储层

英文篇名：Predicting fractured reservoirs by multi-azimuth seismic data in BZ28-1 oilfield
中文刊名：中国海上油气
英文刊名：China Offshore Oil and Gas
作者：谢涛 ; 杨凯 ; 金明霞 ; 毛宁波
英文作者：Xie Tao1 Yang Kai1 Jin Mingxia1 Mao Ningbo2(1.The Geophysical Department of China Oilfield Services Limited ; Tianjin ; 300451 ; 2.Key Laboratory of Oil and Gas Resources and Exploration Technologies ; Ministry of Education ; Yangtze University ; Hubei ; 434023)
中文关键词：多方位地震采集 ; BZ28-1油田 ; 裂缝储层 ; 方位NMO速度 ; 方位时差 ; 方位AVO
英文关键词：multi-azimuth seismic acquisition ; BZ28-1 oilfield ; fractured reservoir ; azimuthal NMO velocity ; azimuthal travel time ; azimuthal AVO
出版日期：2011-06-15
机构：中海油田服务股份有限公司物探事业部;长江大学油气资源与勘探技术教育部重点实验室;
年：2011
期：03
出版单位：中国海上油气

摘要

渤海BZ28-1油田为裂缝性潜山油气藏。该区原三维地震资料分辨率低、信噪比低,很难满足裂缝储层预测的要求。为了研究该区裂缝的分布,设计了由8条二维测线组成的多方位地震测网,首次进行了多方位地震采集,并对新采集的数据进行了高分辨率处理和完全保幅处理。利用方位NMO速度、方位时差、方位AVO等地震属性的变化,对BZ28-1油田裂缝发育状况及分布进行了预测,取得了较好的效果。
BZ28-1 is an oilfield with fractured buried-hill reservoirs in Bohai sea,where existed 3D seismic data failed to predict the fractured reservoirs because of their low resolution and low signal-to-noise ratio.In order to probe into the fracture distribution in this field,multi-azimuth seismic data have been firstly acquired by designing a multi-azimuth seismic network composed of 8 2D lines,and have been processed for high resolution and complete amplitude preservation.Using the variations of seismic attributes such as azimuthal NMO velocity,azimuthal travel time and azimuthal AVO,the development and distribution of fractures are predicted in BZ28-1 oilfield,resulting in a good effect.

引文

[1]TSVANKIN I.Anisotropic parameters and P-wave velocity fororthorhombic media[J].Geophysics,1997,62(4):1292-1309.
    [2]Li Xiangang.Fracture detection using azimuthal variation of P-wave moveout from orthogonal seismic survey lines[J].Geo-physics,1999,64(4):1193-1201.
    [3]RUGER.Variation of P-wave reflectivity with offset and azimuthin anisotropic media[J].Geophysics,1998,63(3):935-947.
    [4]SIMON.Fracture prediction from wide-azimuth land seismicdata in SE Algeria[J].The Leading Edge,2007,26(9):1154-1160.