Time lapse rock physics template and seismic quantitative analysis amid the production phase
Journal of Applied Geophysics, ISSN: 0926-9851, Vol: 174, Page: 103956
2020
- 6Citations
- 9Captures
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Article Description
With the advancement of technology and more complex frontiers, importance of extending the life of and maximizing the recovery from producing field is unprecedented. It is important to understand the dynamics of change in reservoir elastic behaviour with varying subsurface physical conditions. Moreover, defined relations are required to relate the measured time lapse seismic effect attributed to these variations. Conventional rock physics analysis provides a mean to functionalize these relations. We propose a pragmatic workflow to model seismic signatures at different stages of production profile for understanding the changes in reservoir behaviour. In this process 4D rock physics seismic template has been generated. These templates provides framework to map the effects on seismic amplitude as variables of possible alterations in reservoir physical conditions. Among many petrophysical and reservoir properties, saturation and pressure plays major role in defining reservoir commerciality and future production trend. Whereas finding out independent quantifiable changes in pressure and saturation from the observed variations in stacked seismic data or in acoustic impedance in not possible. Moving to EEI domain time lapse template and scanning different χ angle projections helps us in separately quantify their individual effects. Further, an attempt has been made to compile all the quantitative and qualitative measurements of variations in parameters controlling seismic responses of the subsurface in to a framework of scoring system. It is presented as a 4D report card. This report card provides an overall understanding on sensitivity of the reservoir towards production related environmental alterations and assesses success of this study.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0926985119306445; http://dx.doi.org/10.1016/j.jappgeo.2020.103956; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85078525412&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0926985119306445; https://dx.doi.org/10.1016/j.jappgeo.2020.103956
Elsevier BV
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