Ravva - Cairn’s first development success story has been the bedrock of innovation, and the foundation of our success story in the country and the region. Ravva, which in Sanskrit and Telegu means “diamond” showcases the journey of growth that Cairn has been able to achieve in its business. Incidentally, Ravva is the only field in India to get such a unique name indicating the belief of the nation in it. http://www.cairnindia.com/

1.
RAVVA
Celebrating 16 Years of Technical Excellence
Innovating Development | Reservoir Simulation

2. Ravva | Innovating Development
Reservoir Simulation
Reservoir Simulation Studies have been a critical tool to understand the performance of the field and
devise methods for optimum development and exploitation of the reservoirs. Reservoir simulations help in
identifying any deviations from the predicted path of reservoir performance and help in fine tuning the
exploitation strategy to make mid-course adjustments to achieve the ultimate target of achieving the
projected recoveries from the oil fields.
The first 3D simulation studies for
Ravva were carried out in 1996
soon after the PSC was signed and
it was used for the initial
development planning. This study
was based on the limited data
available at that point of time. With
additional data being available,
revised simulation studies were
carried out in 1997, which
recognised that the field could be
produced at higher offtakes and
recommended the increase in the
oil production plateau rate from
35,000 bopd to 50,000 bopd.
Again, in 2004, based on revised
geological modeling, reservoir
simulation studies were conducted
which formed the basis for infill and
further appraisal drilling in the
Ravva field. The results from the infill drilling / workover programme of 2007 were as per expectations.
Based on the results of the last drilling campaign, the geological model for Ravva has been further revised
in 2008 and is currently being evaluated for identifying further infill and workover opportunities in the field.
The field has so far been performing as per expectations and predictions from the previous reservoir
simulation studies.
The performance review and monitoring are warranted due to the availability of additional data, possible
deviation from the recommended path of development, new set of exploitation conditions and advances in
technology. The critical element in creating a representative dynamic model of the reservoir is
representing the technical character of the field/ reservoir with a comprehensive geological model. This is
a pre-requisite for the formulation of a viable and effective exploitation strategy. The realisation of the
effective yield from the field would ultimately depend on the best design and timely execution of the
development plans. Ravva reservoir models are created using state-of–the-art modeling tools like
PETREL and ECLIPSE reservoir simulators.
Through repeated cycles of model building and reservoir simulation, the performance and the potential of
Ravva field is being continuous evaluated and appropriate steps taken to achieve the ultimate objectives.