Indonesia has a plan to reduce its emissions of carbon dioxide (CO2), a green house gas, by 26% by 2020 as a measure against global warming. Emissions of CO2 into the atmosphere from gas fields during production of natural gas is a problem for this plan, making it an urgent task to establish systematized techniques for carbon dioxide capture and storage (CCS) as a direct measure for their reduction . This study concerns approximately 0.3 million ton of CO2 emitted annually during production of natural gas in a gas field presently under development in the Gundih Area, Central Java Province, Indonesia. It is a pilot study for research and development of technologies for assessing deep strata at sites of CO2 injection, which is essential for safe application of CO2 sequestration technologies, and for monitoring of underground distribution and behavior of CO2 through capacity development of organizations and human resources.