摘要
苏里格气田S区块储层具有低孔、低渗、非均质性强的特点,储层埋深较大,有效砂岩储层薄。且地表为沙漠、半沙漠环境,煤层发育,地震信号屏蔽现象严重,地震资料分辨率低,有效砂岩储层地震响应特征不明显,地震响应隐含于薄互层复合响应中,由此地震资料获取的波阻抗反演结果无法识别有效砂岩储层。为此,针对该问题,提出了解决方案:应用HFE高分辨率处理技术对地震数据进行重新处理,在保真的基础上改善地震数据分辨率,然后在高分辨率地震数据基础上进行AIW波阻抗反演获取波阻抗数据体识别有效砂岩储层。研究结果表明,应用HFE高分辨率技术及AIW波阻抗反演方法后,原始地震数据的品质得到了较大改善,分辨率得到了较大提高,且AIW波阻抗反演结果与井数据吻合较好,为HFE高分辨率处理技术及AIW波阻抗反演方法在其他油气田的应用提供一定的经验和参考价值。
The reservoir of Sulige gas field has the characteristics of low porosity, low permeability and strong non--uniformity, the reservoir of valid sandstone is greatly deep and thin, and the surface of the gas field is covered by desert and semi--desert, developing coal seam produces serious screen phenomenon, which reduced a low resolution of the seismic data and unclear feature of the seismic response to valid sandstone, causing the seismic response of valid sandstone to be embedded in the composite response of thin interbedded. Therefore, valid sandstone has not been identified by the results of acoustic impedance inversion, which increases the difficulty of reservoir identifying of the valid sandstone. In order to solve the problem, the solution was proposed, which was adopting a high frequency expanding technique to re--process seismic data of the region, acquiring seismic data of high resolution, and would execute the acoustic impedance inversion based on wavelet edge analysis and modeling after the high frequency expanding. The result indicates that after the processed of high frequency expanding, the vertical resolution of the seismic data has been improved on the basis of fidelity, and the results of the acoustic impedance inversion based on wavelet edge analysis and modeling were authentic by comparing with the data of the well, which provides guidance for the application to the other oil and gas fields.
出处
《工程地球物理学报》
2012年第3期311-316,共6页
Chinese Journal of Engineering Geophysics
关键词
苏里格气田
有效砂岩
波阻抗反演
分辨率
Sulige gas field
valid sandstone
acoustic impedance inversion
resolution
