宽线加大组合地震技术在库车坳陷中部勘探中的应用

Application of broadened line plus large geophone array seismic technology in exploration in mid Kuqa

库车坳陷中部石油地质条件优越,但由于地震资料品质差,制约了勘探进程。地震勘探难点主要表现在:地面高大山体发育,地形条件复杂,地表类型多,地震采集困难;表层结构复杂,调查建模不准,求准静校正难;激发接收条件差,资料信噪比低,构造落实难等。针对库车中部地震勘探面临的诸多难题,开展了地震技术攻关,形成了宽线加大组合观测方法及高精度遥感信息选线选点等地震采集技术,从而提高了地震资料信噪比,改善了地震成像质量,为发现和落实钻探目标创造了条件。

Though the petroleum geological conditions are excellent in mid Kuqa,exploration in the area is slow due to poor quality of seismic data.The difficulty in exploration lies in high mountains,complex landform,and complicated near surface conditions.To tackle these problems,continuing seismic data acquisition technology research was carried out.A suite of techniques has been developed.The key techniques to successful data acquisition are broadened line plus large geophone array,and allied techniques include selection of point and line position by high resolution remote sensing.The signal-to-noise ratio of seismic data acquired by the proposed methods is improved significantly,which provides solid foundations for ascertaining drilling targets.