层序控制下的浊积岩厚度估算与储层预测

Turbidite thickness estimate under sequence control and reservoir prediction

浊积岩储层厚度的求取是油气藏描述的重要部分,采用普通振幅法计算易造成较大的误差。针对大芦湖油田浊积岩储层多期次发育,储层厚度难以精确预测的问题,在层序控制下,基于薄层反射调谐原理,利用生成调谐频率及调谐能量体对储层厚度和其横向变化进行描述,对实钻井砂体厚度与调谐频率进行相关性分析,定量估算了储层厚度,并对储层展布进行了预测。预测结果有效指导了该区滚动勘探,取得良好的勘探开发效果。

Reservoir thickness calculation is an important part in reservoir description but big error can be easily occurred by using common amplitude method. As the reservoir of Daluhu oilfield developed in different times, the reservoir thickness is difficult to be accurately predicted. Under sequence control, based on thin layer reflection tuning principle, tuning frequency and tuning energy body have been formed, which are used for describing reservoir thickness and lateral change. After correlation analysis of real drilling sand body thickness and tuning frequency, the quantitative estimation of reservoir thickness, and the reservoir prediction have been carried out. As a result, the prediction results can provide effective guidance for rolling exploration and achieve good effect of exploration and development.