全三维解释方法及其在BZ25—1油田地震解释中的应用

ALL-3D INTERPRETATION METHOD AND ITS APLLICATION IN BZ25-1 OILFEILD, BOHAI SEA

三维可视化技术可以使解释者通过调整透明度、设置光照方向等手段改善视觉效果,突出异常目标,观察数据体的表面特征,透视数据体的内部结构,以确定构造特征和储层的发育分布规律.以方差技术为基础,以Geoquest和VoxeIGeo软件为工具,利用层位自动追踪、砂体和地质体"雕刻"的三维可视化解释新方法.可以从三维空间整体把握构造特点和沉积特征,从而提高地震解释的精度和效率,避免解释的随意性,并使地震信息的利用率有较大提高.该方法在渤中25 1油田的成功应用,为三维地震解释从单纯的单剖面解释向全三维解释转变提供了可借鉴的经验.

By means of adjusting transparence and setting light direction to improve visional effect, the 3D visualization may enable the interpreters to highlight abnormal objectives, observe data surface characteristics and penetrate internal structure of data,so as to determine geologic structure and reservoir development. Based on the variance cube technology, the 3D visualization can take Geoquest and VoxelGeo software as tools to trace formation automatically and 'sculpture' sand bodies and anomalous geologic bodies. As a new seismic interpretation, the 3D visualization can hold 3D structural and sedimentary characteristics as a whole, improve precision and efficiency of interpretation, and avoid random interpretations, with the utilization of seismic information enhanced greatly. A successful application of the method in BZ25 1 oilfield, Bohai Sea, has provided a useful experience for the seismic interpretation conversion from single sections to all 3D.