井约束提高地震分辨率技术在春光探区的应用  

Application of well constraint seismic resolution enhancement technology in Chunguang exploration area

作　　者：江富贵 黄德芹[1] 杨路娜 胡小波 张冉 牛秋莲 JIANG Fugui;HUANG Deqin;YANG Luna;HU Xiaobo;ZHANG Ran;NIU Qiulian(Exploration&Development Research Institute of Henan Oilfield Company,SINOPEC,Nanyang,Henan 473132,China;Henan Aero Geophysical Exploration and Remote Sensing Center,Zhengzhou,Henan 450000,China;Instrument Repair Center of Huabei Company,Petroleum Engineering Geophysics Co.,Ltd.,SINOPEC,Nanyang,Henan 473132,China)

机构地区：[1]中国石化河南油田分公司勘探开发研究院,河南南阳473132 [2]河南省航空物探遥感中心,河南郑州450000 [3]中国石化石油工程地球物理有限公司华北分公司仪修中心,河南南阳473132

出　　处：《石油地质与工程》2022年第5期1-6,共6页Petroleum Geology and Engineering

摘　　要：春光探区位于准噶尔盆地西部隆起车排子凸起中部,新近系沙湾组构造背景简单,为西北高东南低的单斜构造,主要发育“河道砂体侧缘尖灭”型的岩性油藏,油层厚度一般2~5 m。常规处理地震资料因分辨率不足,只能识别到砂层组,无法精细刻画多期次砂体尖灭带,难以满足岩性油藏精细勘探的需要。采用井约束模式,利用非稳态稀疏反褶积拓展地震数据频宽,然后应用精细Q值补偿技术补偿地震数据衰减的高频成分,达到提高地震数据分辨率的目的,可满足岩性油藏解释的需要。该方法处理过的地震资料,目的层段沙湾组的信噪比、分辨率和振幅保真度等方面均有明显改善;通过精细对比、细分层系,可将沙湾组的砂体尖灭带由原来的“两个带”细分为“七个带”,有效拓宽了勘探领域,新增探明地质储量200多万吨,取得了良好的应用效果。Chunguang exploration area is located in the middle of Chepaizi uplift in the western uplift of Junggar basin.The Neogene Shawan formation has a simple structural background,which is a monoclinal structure with high in northwest and low in southeast.It mainly develops a lithologic reservoir of"pinching out on the side edge of channel sand body",and the thickness of oil layer is generally 2~5 m.Due to insufficient resolution of conventional seismic data processing,only sand groups can be identified,and multi-stage sand body pinching out zones cannot be accurately described,which is difficult to meet the needs of fine exploration of lithologic reservoirs.Using well constrained mode,with unsteady sparse deconvolution to expand the bandwidth of seismic data and fine Q-value compensation to compensate the high-frequency components of seismic data attenuation,so as to improve the resolution and meet the needs of interpretation.The signal-to-noise ratio,resolution and amplitude fidelity of Shawan formation in the target interval have been significantly improved by the seismic data processed by this method.Through fine correlation and subdivision of strata,the sand body pinching out zones of Shawan formation can be subdivided from the original"two"to"seven",with proved geological reserves increased by over 2 million tons and achieving good application results.

关 键 词：春光探区 提高分辨率 井约束反褶积 井约束Q值补偿 

分 类 号：P631.8[天文地球—地质矿产勘探]