Full text loading...
-
Multi-Scale Cave Detection based on Amplitude Difference of Pre-Stack Frequency Division Data Volumes
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
The carbonate fracture-cavern reservoir is the focus of current research in China, and how to detect the fracture-cavern reservoir accurately is a difficult problem. In this paper, a new multi-scale cave detection method is studied to predict the spatial distribution of fracture-cavern reservoir of different scales. Firstly, through forward modeling analysis with different cave scales, we can determine the change laws of “string beads” reflection characteristics. Then we conduct pre-stack frequency division time migration for CMP gathers and get four pre-stack frequency division data volumes. Finally, we carry out multi-scale cave detection based on amplitude difference of frequency division data volumes. Practical application show that this method can detect different cave scales effectively and is highly consistent with the actual drilling results.