高分辨率处理技术在车排子地区的应用

Application of high resolution processing technique in Chepaizi Area

准噶尔盆地西缘区块车排子地区主要圈闭类型为地层及岩性圈闭,勘探目标较为隐蔽,对地震资料的分辨率有较高的要求。分析了高分辨率处理的适应性,针对该区资料的特点,提出了高分辨率处理应解决的问题,即提高地震探测精度,就是要求地震勘探具有更高的垂直和空间分辨率,有更强捕捉弱信号的反应能力。研究了一套适合本区的高分辨率处理方法,即在保证信噪比的前提下,通过噪音压制、反褶积、静校正、高精度速度分析与叠加等高分辨率处理技术的应用,提高了地震资料的分辨率。成果剖面中各反射层位波组特征清楚,层间信息丰富,波形自然稳定,断层走向清晰,断点干脆,能够较好地满足地震资料解释的要求。解释成果也表明,所采用的关键技术及处理流程设计正确、合理,具有推广价值。

Main trap types are mainly the stratigraphic and lithologic traps in Chepaizi Area in the west of Junggar Basin. Exploration target is subtle and high resolution is demanded in seismic data. Aiming at the features of data in the area, we analyze the adaptability of high resolution processing and put forward the problems that will be solved by high resolution processing, which meant that the improvement of seismic explanation precision needs that the seismic explanation has a higher vertical and spatial resolution and a stronger reaction capability of capturing the week singles. A set of high resolution processing method is studied in the area. Without reducing the S/N, the resolution of seismic data is improved largely by using a series of high resolution processing techniques, such as noise suppression, deconvolution, static correction, high-precision velocity analysis and stack. There are some clear reflection events, rich information of interlayer, stable waveforms, distinct fault strikes and breakpoints within each reflection layer on seismic section, which can meet the demand of seismic data inteIpretation. The application result also proves that the critical techniques and treatment scheme we used are correct and are worthy of popularization.