Publications

Interwell coverage and resolution are important parameters that are required to characterize the reservoir and help optimize its management. Traditional well log data provide high-resolution measurements of the formation very close to the wellbore. Surface-based methods provide deeper investigation but coarser resolution. Crosswell seismic provides insight into the interwell space at the reservoir scale, bridging the measurement gap (Figure 1). In this paper, examples of crosswell seismic imaging are discussed with the focus on high resolution structure and injection monitoring during enhanced oil recovery. A brief description of the measurement and its capabilities is provided, followed by a description of the processing workflow and finally a discussion on advanced interpretation using the information within the crosswell data sets. With EOR being becoming more prominent in mature and complex fields, the ability to monitor the efficiency of these strategies is paramount. In these examples, crosswell seismic has been able to successfully monitor the injection through velocity profiling in time lapse and provide answers as to why and how the flow has occurred through interpretation of the reflection seismic section.