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通过对BBT油田试采资料的分析,认为以前确定的主力油层油水界面不合理。因原来的地震资料信噪比和分辨率低,横向存在静校正问题,且存在速度陷阱。为此对地震资料进行了目标处理,运用FOCUS4.3和PG99等软件,采用了针对性的处理技术,并与解释和地质人员紧密结合,使主要目的层的主频由30Hz提高到40Hz,信噪比和连续性有了较大的提高。构造研究方面,利用SeisX软件,在储层精细标定的基础上,对三维地震资料进行精细解释;然后使用地震速度建立了三维地震速度场,并用VSP速度和地震测井速度进行了标定,对研究区进行了变速成图;最后利用已钻井的目的层深度对变速构造图进行了标定,得到了最终的钻井—地震构造图。储层研究方面,利用VoxelGeo和SeisX软件对储层的振幅等属性信息进行了分析,结合已钻井资料划分出了储层展布的有利区。
Based on the analysis of trial mining data of BBT field, it is considered that the previously determined oil-water interface at the main reservoir is unreasonable. Due to the low signal-to-noise ratio and resolution of the original seismic data, the problem of static correction exists horizontally, and there is a speed trap. To this end, the seismic data are processed by using the software such as FOCUS4.3 and PG99, and the targeted processing technology is adopted. With the combination of interpretation and geology personnel, the main frequency of the target layer is increased from 30Hz to 40Hz. Noise ratio and continuity have been greatly improved. In the aspect of tectonic research, we use SeisX software to finely interpret 3D seismic data based on fine calibration of reservoirs. Then, we establish a 3D seismic velocity field using seismic velocities and calibrate them with VSP velocities and seismic logging velocities. Finally, the final map of drilling-seismic structure was obtained by using the depth of target layer of the drilled wells to calibrate the speed-changing structure map. In reservoir research, VoxelGeo and SeisX software were used to analyze attribute information such as amplitude of reservoir. According to drilling data, favorable zones for reservoir development were identified.