地球物理技术在河道砂岩中的应用及问题探讨——以济阳坳陷新近系为例

Application and discussion of geophysical technology for channel sandstones:a case study with the Neocene formation in Jiyang Depression

以地球物理技术在解决日常勘探生产实践工作中遇到的实际问题为基础,探讨了不同技术在不同地质条件下的应用效果和技术瓶颈。研究表明:沿层相干、断层增强和倾角分析等技术基本能够实现微幅构造的解释,但对于更微小的断层识别还没有针对性的技术方法;均方根等振幅类属性在低砂地比地区预测河道砂体展布效果较好,在高砂地比地区还没有形成有效技术手段;能量类属性在含油气性判识方面有一定的作用,但远远不能满足当前勘探的需求。

The application effect and technical bottleneck of geophysical techniques in different geological conditions are discussed based on practical problems encountered in exploration practices.The research indicates that the techniques such as layer coherency,fault enhancement and dip analysis can basically satisfy interpretation of minor structures,but there is no specific technique for identification of microfault yet;amplitude attributes like root mean square are effective for prediction of channel sands distribution in zones with low sand-to-gross ratio,and there has not developed an effective technique for zones with high sand-to-gross ratio;energy attributes have a certain role in distinguishing hydrocarbon potential,but far from being able to meet the need of exploration.