基于双相介质的油气检测技术在辽河牛居地区的应用

Hydrocarbon prediction based on two-phase media in Niuju area of Liaohe basin

针对牛居地区储层厚度薄,相带变化快,有利含油气区预测难度大的问题,利用基于双相介质理论的油气检测技术开展了沙一段有利含油气区预测。首先通过精细井震标定,确定检测时窗,然后利用多井频谱对比分析,拾取敏感频段,最后依据地震波在双相介质中传播具有“低频共振、高频衰减”的特征,进行有利含油气区预测,预测结果与钻井吻合率达80%,可为下步勘探部署提供技术支撑。

In order to solve the problems of thin reservoir thickness,rapid change of facies belt and difficulty in hydrocarbon prediction in Niuju area,the prediction of favorable oil and gas bearing area in the first member of Shahejie formation is carried out by using oil and gas detection technology based on the theory of two-phase media.Firstly,the detection window is determined by fine well seismic calibration.Then,the multi-well spectrum comparison analysis is used to pick up the sensitive frequency band.Finally,according to the characteristics of"low frequency resonance and high frequency attenuation"of seismic wave propagation in two-phase media,the favorable oil and gas bearing area is predicted.The results show that the coincidence rate between the prediction results and drilling is up to 80%,which can provide technical support for the next exploration and deployment.