二维高分辨率反演技术在苏里格气田的应用
摘要
二维常规地震反演的分辨率与地震分辨率较为接近,难以识别5m左右的储层。本文利用二维地震与三维地震的关系,首次将二维地震转化为伪三维地震,然后利用三维地震的地质统计学反演算法,对二维地震数据进行了高分辨率的地质统计学反演,从而有效提高了二维反演的纵向分辨率,可满足实际生产对二维地震储层预测的纵向分辨率的要求。同时,结合叠前道集AVO弹性波阻抗反演及高分辨率二维地震储层预测,描述薄有效储层的平面分布特征,实现利用二维地震数据预测薄有效储层的目的。
The resolution of 2D seismic inversion depends on that of the seismic data.So it is difficult to identify the reservoir with the thickness less than 5m.Combined with the high-resolution of 3D geostatistical inversion and the relationships between 2Dand 3Dseismic data,we transform 2D seismic data into pseudo 3Dseismic data firstly,then complete the high-resolution geo-statistical inversion on 2Dseismic data by the geo-statistical inversion algorithm for the 3Dseismic data,which can effectively improve the vertical resolution of 2D inversion to meet geological requirements for the vertical resolution of 2Dseismic reservoir prediction.At the same time,combined with pre-stack AVO elastic wave impedance inversion and the geostatistical inversion,we can effectively identify the plane distribution characteristics of thin reservoirs by 2Dseismic data.So we achieved the purpose of predicting thin reservoirs on 2Dseismic data.
The resolution of 2D seismic inversion depends on that of the seismic data.So it is difficult to identify the reservoir with the thickness less than 5m.Combined with the high-resolution of 3D geostatistical inversion and the relationships between 2Dand 3Dseismic data,we transform 2D seismic data into pseudo 3Dseismic data firstly,then complete the high-resolution geo-statistical inversion on 2Dseismic data by the geo-statistical inversion algorithm for the 3Dseismic data,which can effectively improve the vertical resolution of 2D inversion to meet geological requirements for the vertical resolution of 2Dseismic reservoir prediction.At the same time,combined with pre-stack AVO elastic wave impedance inversion and the geostatistical inversion,we can effectively identify the plane distribution characteristics of thin reservoirs by 2Dseismic data.So we achieved the purpose of predicting thin reservoirs on 2Dseismic data.
引文
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[7]王霞,张延庆,于志龙等.叠前反演结合地质统计模拟预测薄储层.石油地球物理勘探,2011,46(5):744～748Wang Xia,Zhang Yanqing,Yu Zhilong et al.Thin res-ervoir prediction by prestack inversion combined withgeostatistic simulation.OGP,2011,46(5):744～748
[2]边树涛,狄帮让,董艳蕾等.地质统计反演在东濮凹陷白庙气田沙三段储层预测中的应用.石油地球物理勘探,2010,45(3):398～405Bian Shutao,Di Bangrang,Dong Yanlei et al.Applica-tion of geostatistical inversion in reservoir prediction inthe third member of Shahejie Formation,Baimiao GasField,Dongpu Depression.OGP,2010,45(3):398～405
[3]苏云,李录明,钟峙等.随机反演在储层预测中的应用.煤田地质与勘探,2009,37(6):63～66Su Yun,Li Luming,Zhong Zhi et al.Application ofrandom inversion in reservoir prediction.Coal Geolo-gy&Exploration,2009,37(6):63～66
[4]慎国强,孟宪军,王玉梅等.随机地震反演方法及其在埕北35井区的应用.石油地球物理勘探,2004,39(1):75～81Shen Guoqiang,Meng Xianjun,Wang Yumei et al.Random seismic inversion and its application in Cheng-bei Well 35zone.OGP,2004,39(1):75～81
[5]郭晓龙,欧阳永林,陈海东等.叠前地震反演技术在苏里格地区的应用.天然气地球科学,2008,19(6):840～843Guo Xiaolong,Ouyang Yonglin,Chen Haidong et al.Application of pre-stack seismic inversion in Suligearea.Nature Gas Geoscience,2008,19(6):840～843
[6]强敏,周义军,钟艳等.基于部分叠加数据的叠前同时反演技术的应用.石油地球物理勘探,2010,45(6):895～898Qiang Min,Zhou Yijun,Zhong Yan et al.Applicationof pre-stack simultaneous inversion based on partialstack data.OGP,2010,45(6):895～898
[7]王霞,张延庆,于志龙等.叠前反演结合地质统计模拟预测薄储层.石油地球物理勘探,2011,46(5):744～748Wang Xia,Zhang Yanqing,Yu Zhilong et al.Thin res-ervoir prediction by prestack inversion combined withgeostatistic simulation.OGP,2011,46(5):744～748
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