AVO技术在港北地区流体预测中的应用

Application of AVO Technology to Fluid Prediction in Gangbei Area

港中油田位于港北地区滨海断层以北的区域,针对港中油田港北地区沙河街组主要含油气层段砂泥岩的波阻抗差异小、砂体分布复杂、砂体的平面展布特征预测难度大等技术难点,将AVO技术引入该工区开展储层和流体预测。通过精细的岩石物理分析,选取有效的储层和流体敏感弹性属性,对目标区沙二段滨Ⅲ储层进行了岩性和流体预测,预测结果与实钻结果吻合程度高。

In Gangzhong oilfield, located at the north of Binhai fault, Gangbei area, the Shahejie Formation is an oil/gas-bearing bed which is mainly composed of sand and shale. During its reservoir and fluid prediction, there are some technological difficulties, including small difference of wave impedance, complex sandbody distribution, and very difficult prediction of sandbody lateral distribution. So, AVO technology has been applied to the study area. For the Bin III reservoir of Shahejie 2 Member, its lithology and fluid were predicted after a fine petrophysical analysis. And the predicted results highly accords with actual drilled ones.