Microseismic Reservoir Monitoring in a Deep Wellbore Carbonate Environment in Kazakhstan

The Karachaganak field is a super giant gas and condensate field in North-western Kazakhstan. Karachaganak Petroleum<br>Operating BV (KPO) has deployed an 8-level microseismic sensing system in 2008, with its deepest sensor at 4109 m sub-sea<br>depth to monitor and interpret production-related microseismicity, which can have a significant impact on reservoir<br>management of the Karachaganak Field. An on-site microseismic sensing system is recording microseismic events on a<br>continuous basis. Microseismic events have been located and initial interpretations of the microseismicity will provide<br>valuable input to the reservoir model and should impact how the reservoir is developed.