Institute of Computational Mathematics and Mathematical Geophysics SB RAS

International Conference on Mathematical Methods in Geophysics «MMG-2008»

Akademgorodok, Novosibirsk, Russia, October 13-15, 2008

Abstracts

Mathematical Simulation in Geophysical Problems. Seismic Methods, Problems of Geomonitoring and Geodynamics

Sensitivity analysis of well-bore acquisition systems for monitoring of reservoir properties

Serdjukov S.V., Sylvestrov I.Yu., Tcheverda V.A.

Institute of Mining SD RAS (Novosibirsk) Institute of Petroleum Geologya an Geophysics SD RAS (Novosibirsk)

Time-lapse or 4D seismic is very promising and intensively developed direction in reservoir monitoring during production life of many reservoirs. The most widely used 4D seismic techniques a baseline 3D seismic survey is made over a producing reservoir and a repeat or monitor survey is conducted after hydrocarbon is produced over some time, the difference in the two data sets providing a measure of the saturation and pressure changes as the reservoir depletes. The objective of the paper is to extend time-lapse measurements at the wells into the interwell reservoir volume. The main advantages of well-bore based acquisition system are extremely low level of noises and possibility to approach as close as possible to the target. But there is significant disadvantage also – there is impossible to install rather dense seismic networks there. So it is important to provide reliable estimation of resolving ability of well-bore based monitoring. In the paper this study is implemented with the help of SVD analysis of linearized operator of inverse problems. Numerical experiments are performed and discussed.

Note. Abstracts are published in author's edition

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